382 



BULLETIN OK THK UNITED STATES FISH COMMISSION. 

 Gonionemus vertens A. Ag. Fig. 103. 



(Com. Nut. Hist. C.S., iv. p. 350.) 



Bell hemispherical. Marginal tentacles numerous, each with a sense-bulb at its base, and a 

 "knee-pad" of adhesive cells near its end which appear as thickenings of the tentacles at a short 

 distance from their ends. Otocysts numerous between the bases of the tentacle.". Proboscis short, 

 not reaching more than halfway to the velum, and ending in four frilled mouth-arms. Radial canals, 4. 

 Ovaries 4, forming convoluted bands fallowing the radial canals to the bell margin. 



Color*. Tentacle bases emerald green and brown, with a black eye-spot. Proboscis and ovaries 

 yellowish brown. 



Dixt.riliiitioH.The Eel Pond, at Woods Hole. 



Melicertum campanula Kscli. 



(Syst. dt-r Ami., p. 105.) 



Fig. 104. 



Bell deep, the upper portion somewhat narrowed. Marginal tentacles numerous, hollow, with- 

 out eye-spots at their liases. Nootocysts. Proboscis short, ending in eight frilled mouth-arms. Radial 

 canals 8. Ovaries 8, convoluted, extending beneath the radial canals to the margin. 



('tilrirx. Ovaries, proboscis, and tentacle bases light yellow. 



Dinli-iliiilinii. Woods Hole. (Vinal Edwards.) 



102. TV"-'// '/"""" 

 , Kubr.). 



.ffiquorea albida A. Ag. 

 (North American Aealephse, p. 110.) 



Bell rather shallow, in the shape of a low dome with lateral outlines slightly sinuous. Marginal 

 tentacles very numerous, with otocysts between their bases and without evident sense-bulbs. Pro- 

 boscis small, butjevident, without mouth-arms. Radial canals very numerous. 



Colors. Radial canals appearing as whitish lines. 



Distribution. Buzzards Bay; Naushon. (A. Agassiz. ) 



I have not seen this species, and the above description is taken from that of the original describer. 



Zygodactyla grcenlandica Ag. 

 (Cont. Nat. Hist. U.S., vol. IV, p. 360.) 



Bell shallow, a low dome, hardly emarginate along the lateral outlines. Marginal tentacles 

 exceedingly numerous, swollen at their bases. Otoeysta numerous; situated between the tentacle 

 bases. Proboscis large, thin-walled, reaching beyond the bell opening when not retracted, and sur- 



1 Since the above was written numerous specimens of this species have been secured at Woods Hole by Mr. Hal. Childs. 



