840 



HI I.I.KTIN OF TiJK UNITED ATATKS FISH COMMISSION. 



Tubulajria crocea (A-;.). Fig. 1!). 



( I'urililhni-i-i ,i;n Aj;.. ('out. Xilt. Hivt.r.S., Vol. IV, p. 2 111. ) 



TVopAosojnc. Colony gmwlng JH dense tufts of stems entangled below and separated into long 

 pedicels above, attaining it hs-ighl of Sto4 inches. Stems unbranched or sparsely branched, annulated 

 slightly at .intervals, and invollen just below the liydranth. Hydranth with a body whorl of about 

 20 to 24 tt'ntifles, ami about the same nnmlier in the distal set. 



0onoMflM,->-Goi|ophoics growing in racemes or clusters. Sessile medusae with a group of about 

 four tentacular proccssi s at its oral end, those of the female being laterally compressed. There are no 

 evident radiating canals. 



( 'nlur, Body of hydranths and gonophores rose red. Stems pale, almost white. 



IHnlriliiiliiiii. Found growing very profusely on the piles of the Fish Commission dock at Woods 

 Hole; also on the piles of the docks at New Haven and other similar places. 



This species i.s exceedingly difficult to distinguish from T. spei-Uibilin. Indeed, little confidence 

 can l>e placed in identification of specimens without mature female gonophores. 



' 



19. Tiilinl'iriit i-rnrm (A(f. i. A. Cluster of ffonopliores. 20. Hypolytiif i>cregrinut Murb.' "(After Murbach.) 



HYPOLITIS. 



iiitK'. Colony consisting of single hydranths with a long proboscis and a distal and proxi- 

 mal whorl of filiform tentacles. The proximal end of the stem is free. 



(,'oiiiHiiiiiif. Oonophores borne on the prolwscis immediately above the proximal whorl of tentacles. 

 They occur singly and not in clusters in the type specimen. The sessile medusre are long and terete 

 in form, and show no tentacular processes. 



Hypolytus perigrinus Murbach. Fig. 20. 

 (Quart. Journ. Mic. Sci., vol. 42, part 3, p. 341.) 



The generic description above is sufficient to identify the one known species of the genus. 

 Description condensed from original; figure copied from that of Dr. Murbach, with his permission. 



HYBOCONIDAE. 



Trophosonie. Colony unbranched. Stem with a distinct chitinous perisarc, and rooted to a true 

 hydrorhiza. Hydranths large, with a proximal and distal set of filiform tentacles. 

 Cfenosonte. Gonophort; producing free ineduso?. 



