H. Richardson — Isopods of the Bermudas. 289 



extending beyond telson. Both branches have the margins smooth, 

 entire. 



First gnathopods with small hand. Dactylus short. Free inner 

 margin of propodus furnished with hairs. Second gnathopods and 

 first periopods similar in shape to, but smaller in size than, first pair 

 of gnathopods. The free inner margin of the propodus is beset with 

 two spines, the carpus with one spine. The remaining periopods 

 have a single spine at the distal margin of the jn-opodus and two 

 spines on the carpus. 



One specimen, a female, was collected by A. E. Verrill at the Ber- 

 mudas in 1901. 



Type in Peabody Museum of Yale University. Cat. No. 3349. 



This species differs from A. elongata Norman, in the shape of the 

 outer branch of the uropoda, in the length of both branches, as com- 

 pared with the terminal abdominal segment, and in the fact that the 

 margins of the outer branch in our species are smooth and not cren- 

 ulate, as in A. elongata. 



Family Cirolanidae. 

 Colopisthus Richardson, gen. nov. 



Head transversely elongated. Eyes situated in the middle of the 

 lateral margins at the extreme edge and elevated knob-like above the 

 surface. 



Both pairs of antennas short; second pair reach the posterior mar- 

 gin of the first thoracic segment. 



First five abdominal segments consolidated into one short segment. 

 Terminal segment strongly keeled in the median longitudinal line. 



Colopisthus parvus, Richardson, sp. nov. 



Plate XXXVIII. Figures 33-36. 



Head transversely elliptical, the anterior and posterior margins 

 rounded. The eyes are situated in the middle of the lateral margins 

 at the extreme edge, and are elevated above the surface of the head 

 like knobs. The head is concave between the eyes. 



The first pair of antennas are short, not much longer than the 

 width of the head, and reach the end of the last peduncular joint of 

 the second pair of antennas; the flagellum contains three joints. 



The second pair of antennas are also short, extending to the pos- 

 terior margin of the first thoracic segment; flagellum consists of 

 seven joints. 

 Trans. Conn. Acad., Vol. XI. 19 January, 1902. 



