ISOPODS OF NORTH AMERICA. 



599 



Abdomen not narrower than thorax; pleural lamellae large. 



Terminal segment of body much broader than long, widely rounded 

 posteriorly, not conically produced as in Oniscus. Basal joint of the 

 uropoda large, broadly expanded inside, not oblong as in Oniscus; 

 inner branches close together, their internal lateral margins contigu- 

 ous. Inner branch inserted but little or scarcely at all in advance of 

 the outer branch, situated close to the inner post-lateral angle of the 

 peduncle. Outer branch somewhat longer than inner branch. 



SYNUROPUS GRANULATUS Richardson. 



Synuropus granulatus RICHARDSON, Proc. U. S. Nat. Mus., XXIII, 1901, pp. 

 563-564. 



Locality. El Yunque, Porto Rico, at an altitude of 2,800 feet. 

 Body oval, not able to be contracted into a ball, with the lateral 

 parts of the segments expanded. 



Entire surface of body covered with small 

 tubercles. 



Head deeply set in the first thoracic segment, 

 the rounded anterior angulations of which reach 

 the antero-lateral angles of the head. The an- 

 terior margin of the head is produced in an ob- 

 tusely pointed median lobe. The lateral lobes 

 are very acute. The antennae are geniculate at 

 the articulation of the fourth and fifth pedun- 

 cular joints; the flagellum consists of three 

 joints. 



The first thoracic segment is longest; the 

 others are subequal. The ab- 

 domen is not narrower than 

 the thorax. The first two 

 segments have their lateral 

 margins concealed. The three 

 following have their lateral 



margins broadly expanded. The terminal segment 

 is twice as broad as long, with the posterior margin 

 broadly rounded. The basal joints of the uropoda 

 are large, being partly covered by the terminal seg- 

 ment of the body. The outer branch is styliform 

 and extends its entire length beyond the terminal 

 abdominal segment. The inner branches are situated close together 

 in such a way that the inner lateral margins are contiguous through- 

 out their length. /&&_ 

 The legs are ambulatory, similar, and subequal. 

 Color brown, mottled with black. 



FIG. 655. SYNUROPUS GRANU- 

 LATUS. a, DORSAL VIEW, b, 

 UROPODA. 



FIG. 656. SYNUROPUS 

 GRANULATUS. MAX- 



ILLIPED. 



