138 



THE MEDUSAE. 



Halicreas Fewkes, 1882. 

 sens. em. Maas, : 05. 



Halicreasidae with exumbral warts ; with eight radial canals. 



The original specimens for which Fewkes ('82 b ) founded this genus were 

 so fragmentary that little more than the chief generic character, the exum- 

 bral warts or papillae, could be distinguished. Fortunately, since these 

 structures are so far unparalleled among Medusae, the generic identity 

 of his material is not in doubt; but his description ('82 b , '86) and figures are 

 so incomplete, omitting as they do any reference to tentacles or sensory 

 clubs, that I prefer to follow Maas (: 05) in adopting H. papillosum as 

 proposed by Vanhdffen. Vanhoffen's other species, H. glabrum, and H. 

 rotundaium must be transferred to the genus Homoeonema, because they lack 

 the exumbral papillae. 



Halicreas papillosum Vanhoffen. 



Halicreas papillosum Vanhoffen, : 02 b , p. 68, taf. 9, figs. 7, 8, taf. 11, fig. SO; Maas, : 05, 



p. 57, taf. 10, fig. 70, taf. 11, fig. 71. 

 ? Halicreas minimum Fewkes, '82b, p. 306 ; '86, p. 953, pi. 8. 



Plate 3, Fig. 3; Plate 33, Figs. 8, 9; Plate 34, Figs. 1-3, 5, 8, 10, 11. 



Station 4621 ; 1 specimen. 



Station 4631; in trawl from 774 fathoms; 1 fragmentary specimen. 



Station 4647; in trawl from 2,005 fathoms; 3 specimens; fair condition. 



Station 4653; in trawl from 536 fathoms; 1 specimen. 



Station 4654; in trawl from 1,036 fathoms; 2 specimens; fragmentary. 



Station 4G65; 300 fathoms to surface; 1 fragmentary specimen. 



Station 4666; in trawl from 2,600 fathoms; 1 large specimen. 



Station 4668; 300 fathoms to surface; 3 specimens. 



Station 4669; 300 fathoms to surface; 2 small specimens. 



Station 4670; in trawl from 3,209 fathoms; 1 specimen; fair condition. 



Station 4671; 300 fathoms to surface; 1 specimen, 6 mm. in diameter. 



Station 4676; 300 fathoms to surface; 2 specimens; fair condition. 



Station 4685 ; surface ; 1 specimen ; the disc only. 



Station 4691 ; 300 fathoms to surface; 3 fragmentary specimens. 



Station 4707; 300 fathoms to surface; 1 specimen. 



Station 4709; in trawl from 2,035 fathoms ; fragments. 



Station 1711 ; 300 fathoms to .surface; 2 fragmentary specimens. 



