Fraser, 1937b : 6 Names of hydroids (Cnidaria, Hydrozoa) established by Charles McLean Fraser (1872 - 1946), excluding those from Allan Hancock Expeditions Calder, Dale R. Choong, Henry H. C. Zootaxa 2018 2018-10-02 4487 1 1 83 52XWS Fraser, 1937 b Fraser 1937 [151,590,1580,1606] Hydrozoa Aglaopheniidae Streptocaulus GBIF Animalia Leptothecata 62 63 Cnidaria species gracilis     Streptocaulus gracilis  Fraser, 1937b: 6, pl. 2, fig. 10.     Holotype. USNM 43293: Puerto Rico, off northeast coast, 18°30’20”N, 65°57’00”W, Johnson-Smithsonian Deep- Sea Expedition Sta. 9, 0  1 February 1933, 240–280 fm (  439–512 m), R/ V Caroline, one colony, ca. 9 cmhigh, in fairly good condition, without gonophores, coll.  PaulBartsch, labelled “ type” and “ holotype”; ethanol.  Schizoholotype.BCPM 976-00946-001, Puerto Rico, one colony fragment, 1.3 cmhigh, in good condition, without gonophores; slide (slide is broken lateral to mount).    Typelocality. Puerto Rico: off northeast coast, 18°30’20”N, 65°57’00”W, 240–280 fm (  439–512 m) (Johnson- Smithsonian Deep-Sea Expedition Sta. 9; Bartsch, 1933).  Current status.Valid.   Remarks.The name-bearing typeof  Streptocaulus gracilis(USNM 43293), designated by Fraser (1937b)as a holotype, is listed in the NMNH database as a syntype. Examination of the typematerial confirms the existence of a single specimen, i.e., the holotype. The single location record of the species as cited in Fraser’s original account, from the slope north of Puerto Rico (18°33’15”N, 65°56’45”W, 240 fathoms), does not match that of type material (USNM 43293) in the current online database record of the NMNH (syntype, N of St. Thomas, U.S. Virgin Islands, centroid latitude 18.5583, longitude -65, Johnson-Smithsonian Deep-Sea Expedition Sta. 98, 549 m). Neither of these locations appears to be correct. A label in the vial with the holotype specimen indicates that it was collected at Johnson-Smithsonian Deep- Sea Expedition Station 9, not Station 98. According to Bartsch (1933), Stn 9 was occupied at 18°30’20”N, 65°57’00”W, 240–280 fm ( 439–512 m) on 0 1 February 1933. He reported that at Station 98, sampling gear did not touch bottom and only pelagic animals were collected. A slide of  S. gracilisexists in the RBCM (BCPM 976- 00946-001), but no collection data are provided with it. The species was not listed in Arai (1977). Collection data recorded above correspond with those of Station 9 in Bartsch (1933).   Streptocaulus gracilis, held to be valid in WoRMS, was described from a single specimen. Its trophosome was said by Fraser (1937b)to be a “Colony 8 cmin height…”, and the record in the NMNH database (USNM 43293) lists a specimen count of “1.” That specimen is the holotype, and material on a slide at the RBCM (BCPM 976- 00946-001) represents a fragment of the holotype(i.e., a schizoholotype).  Ramil & Vervoort (1992: 175)suggested that  Streptocaulus gracilismay be referable to family Plumulariidaerather than Aglaopheniidaebased on trophosomal morphology. If so, it warrants assignment to a genus other than the aglaopheniid taxon  StreptocaulusAllman, 1883. The gonosome of  S. gracilisis unknown. 1915526016 1933-02-01 USNM V Caroline Puerto Rico 476 18.505556 Puerto Rico 21 -65.95 62 63 USNM 43293 1 holotype 1915526029 [695,1302,1789,1814] Puerto Rico Paul 62 63 2 Paul holotype 1915526044 Puerto Rico 476 18.505556 Puerto Rico 21 -65.95 62 63 1 holotype