ISOPODS OF NORTH AMERICA. 45 



APSEUDES PROPINQUUS Richardson. 



Apseudes proplnquvs Richardson, Trans. Conn. Acad. Sciences, XI, 1902, pp. 

 281-283, pi. XXXVII, figs. 6-9. 



Localities. — Bailey Bay and Castle Harbor, Bermudas; Gulf of 

 Mexico. 



Found on surface. 



Body narrow, elongated, surface smooth. 



Head with frontal maro'in produced in the middle in a long, acute, 

 deflected process, from base of which on both sides there is an abrupt 

 lateral expansion, the margin forming an outward curve which 

 extends to the base of the ocular lob(» and then proceeds straight to 

 the lateral margin of the head. Ocular lobe produced in an acute 

 process. Eyes large, black, occupying the whole of the ocular lobe. 



First pair of antennsv with tirst joint of peduncle long, and armed 

 on the inner lateral margin with two large spines and one small one 

 near the base, and on distal end of outer margin with one large spine. 

 Second joint less than one-third the length of tirst joint and unarmed. 

 Third joint one-half as long as second joint. Flagellum composed 

 of sixteen joints. Secondary appendage composed of eight joints. 

 Second pair of antenna' with an exopod at base of third joint of 

 peduncle; flagellum composed of ten joints. There is a conspicuous 

 spine on the epistome. 



First two free segments of the thorax about equal in length, the 

 three following ones longer, increasing in length, the last segment a 

 little longer than the flrst two. The antero-lateral margins of all 

 the segments are acutely produced, those of the fourth and fifth free 

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

 directed curved spine on the ventral surface of the first free segment. 

 On the ventral surface of the second segment there is a straight spine 

 directed posteriori}'. The third, fourth, and fifth segments bear each 

 a ventral curved spine directed anteriorh\ 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 attach- 

 ment of the uropoda. The posterior margin is ti'iangulate. The 

 inner })ranch of the uropoda is very long, equal in length to half the 

 l)ody, and is composed of thirty-four joints. The outer branch con- 

 sists of eleven joints. 



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

 podus near the articulation of the dactylus. There is a conspicuous 

 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 margin of the 



