96 Notes on North American Crustacea^ 



dactylus without tooth. Ambulatory feet with ten long, slender 

 spines above and two or three below. 

 Length of carapax, about half an inch. 



Found at Manzanillo (West Coast of Mexico), by John 

 Xautus, Esq. 



]Votoloi>as, nov. gen. 



Carapax pyriform ; back with a flattened area on the posterior 

 half, enclosed by a ridge which posteriorly becomes a broad concave 

 lamella, occuf)ying the entire width of the carapax and projecting 

 over its posterior extremity. Rostrum long, bifid ; horns divaricate. 

 There is a prseorbital spine of moderate size, and behind the eye a 

 strong triangular lobe extending slightly beyond the tip of the eye, 

 and somewhat excavated in front, forming part of the orbit, which, 

 however, is not completed below. The external antennte are not 

 concealed beneath the rostrum, and the basal joint is broad, with a 

 lobed laminiform expansion at the outer side ; coxal joint with a 

 small but prominent tooth on the outer side. Oiiter maxillipeds of 

 the form usual in the Pisinte; meros-joint with no distinct notch for 

 the reception of the palpus. Ambulatory feet cylindrical; dactyli 

 very strong, curved, and nearly as long as the penult joint. Male 

 abdominal appendages of the first pair somewhat flattened, reaching 

 to the last segment of the abdomen, and tapering very little toward 

 the extremity, which is truncate and exj^anded, with a fold on the 

 outer and a small slender hook on the inner side. 



This genus resembles in general appearance some of the 

 genera of Acanthonychiclie ratliei' than those of the Pisa 

 group, in which the characters of the orbital region would lead 

 us to place it. It differs, however, from Halimus and Pugettia 

 in the strong post-ocular lobe excavated in front, and from 

 Halimus also in the non-expanded penult joint of the ambula- 

 tory feet. From Acantliojyhrys A. M. Edw. it differs in its 

 exposed external antenna. The posterior lamelliform expansion 

 of the carapax will distinguish it at a glance from most if not 

 all other genera of Maioids. 



