157 



The uropods are lamellar, rather broad, the inner ramus 

 distally truncate and exceeding the end of the pleon. The 

 outer ramus rather ovate, slightly exceeding the inner, the 

 riiargins of both faintly and irregularly serrate. 



This species is represented by two males, the females 

 being unknown. 



Gulf St. Vincent. 



Haswellia emarginata, Haswell. 

 Plate ix., fig. 18: and plate x., figs. 1 to 11. 



The body becomes narrower anteriorly, smooth, with 

 very few hairs towards the lateral margins. 



The head is slightly longer than the first segment of the 

 thorax, with a well-marked rostral projection very acute at 

 the tip. 



Tiie eyes are large, and project slightly. 



The segments of the thorax behind the first increase in 

 length successively behind, while the seventh tapers to a 

 long process, which extends beyond the end of the pleon, and 

 is terminally truncated and notched or emarginate. 



The epimeral plates of the thoracic segments are pro- 

 duced subacutely behind, except that of the seventh, which 

 is large and rounded; sutures marking off these plates are 

 not evident. 



The anterior portion of the pleon is covered, except at 

 the sides. The posterior portion is depressed and slightly 

 granular. The posterior notch is very deeply cut, its median 

 process projecting well beyond the sides, is truncated, and 

 slightly notched. 



The first joint of the antennular peduncle is rather 

 broad; there is a deep distal notch, the arms of w^iich are 

 equal in length, and do not reach the end of the second 

 joint; the anterior one is curved outwards a little at the end. 

 The second joint has a prominent keel below, ending distally 

 in an acute tooth. The flagellum has 17 small joints. 



The antennal flagellum has 17 joints. 



The mandibles are rather slender, the incisory plates are 

 entire, the other parts are well developed. 



The legs are similar to those found in the genus Circeis. 



The exopods of the first and second pleopods are toothed, 

 as also in the genus mentioned. The appendicc mascnJina is 

 small, and originates rather far along the inner margin of 

 the endopod of the second pleopods. In the third pleopods 

 the transverse suture is near the end; the setules noticed 

 before are present. 



The uropods are broad and very rigid. The exopod has 

 the inner margin more convex than the outer; this is 

 minutely serrate. The inner ramus is large and slightly 



