32 Mr. F. S. Conant on the Cabomedusje. 



CUBOMEDUS^ (Hseckel, 1877). 



Acraspeda with four perradial marginal bodies, which con- 

 tain an auditory club with endodermal otolith-sac and one or 

 several eyes. Four interradial tentacles or groups of tentacles. 

 Stomach with four wide perradial rectangular pockets, which 

 are separated by four long and narrow interradial septa. 

 They belong to the subumbrella, and are developed from the 

 endoderm of the stomach-pockets, so that they project freely 

 into the space of the pockets. 



Family I. CharybdeidaD (Gegenbaur, 1856). 



Cubomedusae with 4 simple interradial tentacles ; without 

 marginal lobes in the velarium, but with 8 marginal pockets ; 

 without pocket-arms in the 4 stomach-pockets. 



Family II. ChirodropidgB (Hseckel, 1877). 



Cubomedusffi with 4 interradial groups of tentacles ; with 

 16 marginal pockets in the marginal lobes of the velarium, 

 and with 8 pocket-arms, belonging to the exumbrella, in the 

 4 stomach-pockets. 



(This family is represented in American waters by a species 

 of CMropsahms found at Beaufort, N.C., and identified by 

 H. V. Wilson as Ch. quadrumana. Before Claus's paper on 

 Chmybdea marsupialis was received at the laboratory. Pro- 

 fessor Wilson had gone over precisely the same ground on 

 Chirojysalmus, but with results so similar to those of Claus 

 that, when the latter's article came, he did not finish for 

 publication the notes and drawings he had made.) 



To accommodate the second species found in Kingston 

 Harbour another family must be added to the preceding. 



Family III. TripedalidaB (1897). 



Cubomedusae with 4 interradial groups of tentacles, each 

 group having 3 tentacles carried by 3 distinct pedalia ; 

 without marginal lobes in the velarium ; with 16 marginal 

 pockets ; without pocket-arms in the stomach-pockets. 



Description of Charyldea xaymacana. (Fig. 1.) 



Genus Charyldea (ace. to Hsftckel) : Charybdeidse with 4 

 simple interradial tentacles, with pedalia ; with velarium 

 suspended, with velar canals and 4 perradial frenula. 

 Stomach flat and low, without broad suspensoria. Four 



