282 II. Richardson — Isojjods of the Bermudas. 



segments have two antero-lateral angulations. There is an anteriorly 

 directed curved spine on the ventral surface of the first free seg- 

 ment. On the ventral surface of the second segment there is a 

 straight spine directed posteriorly. The third, fourth, and fifth seg- 

 ments bear each a ventral curved spine directed anteriorly. The 

 sixth segment has on the ventral surface a large, stout process. 



The lateral margins of all the first five abdominal segments are 

 drawn out in acute processes. 



The terminal segment has two lateral angulations above the 

 attachment of the uropoda. The posterior margin is triangulate. 

 The inner branch of the uropoda is yery long, equal in length to 

 half the body, and is composed of thirty-four joints. The outer 

 branch consists of eleven joints. 



The first gnathopods have a tooth on the distal margin of the 

 propodus near the articulation of the dactylus. There is a con- 

 spicuous spine on the posterior margin of the basis. 



The second gnathopods have one spine at the distal end of the 

 merus on the anterior margin ; one spine at the distal end of the 

 carpus on the anterior margin and two spines on the posterior mar- 

 gins of the same joint ; four spines on the posterior margin of the 

 propodus and two on the anterior margin at the distal extremity ; 

 the dactylus is serrate along the inner margin. Exopods are present 

 on both first and second gnathopods. The other legs are beset with 

 spines. 



A few specimens, both males and females, were collected by A. 

 E. Verrill and party at Bailey Bay and Castle Harbor, Bermudas, 

 in 1898. 



Type specimen from the Bermudas in Peabody Museum, Yale 

 University. Cat. No. 3194. 



This species is very closely related to Apseudes iuterniedhis 

 Hansen* but differs in the following points. 



1. — The first joint of the peduncle of the first pair of antenna? is 

 armed with three spines on the inner margin, and one spine on the 

 outer margin at the distal end. In A. intermedins, this joint is 

 unarmed. 



2. — In the increased number of joints in the flagflla of both pairs 

 of antennae, there being sixteen joints in the fiagellnm of the first 

 pair of antennae, eight in the secondary appendage, and ten in the 

 flagellum of the second pair of antennae, while in Dr. Hansen's spe- 



*Isopoden, Cumaceen, und Stomatopoden der Plankton-Expedition, p. 49-50, 



pi. V, fig. 10-lOb, pi. vi, fig. 1, 1895. 



