BAHAMA CRUSTACEA. 243 



5. hispidiis, extending beyond the peduncle of inner antennae. 

 Whole surface of carapace covered with delicate spines obscurely 

 arranged in rows ; usually curved forward, with a somewhat re- 

 flexed tip. Spines on dorsal surface of first two abdominal seg- 

 ments short and straight in a double row pointing forwards ; on 

 third segment several rows, stouter, pointing outwards ; on the 

 fourth, fifth and sixth segments spines are longer, pointing back- 

 wards. In the middle of the posterior portion of the tergum of 

 the third abdominal segment there is a polished, slightly ele- 

 vated, shield-shaped area, with crenulated margins, about i mm. 

 in length. The median tergal region of fourth segment is 

 smooth and polished, surrounded by a row of appressed spines, 

 the same being true to a less extent of the fifth segment. I 

 have taken the specific name from this peculiar scutellar area on 

 the third abdominal segment. This feature -seems to corre- 

 spond to a triangular but less prominent area on the similar 

 segment in S. hispidits which is prolonged into a smooth dorsal 

 ridge on the next segment. 



Telson lance-shaped, with a double row of spines between 

 which is a longitudinal groove about as long as the uropodal 

 lamellae, which are finely serrated on their margins, and, as the 

 telson, fringed with stiff hairs. 



Eyes on short peduncles which are armed above with three 

 short spines projecting over the cornea, and with a few spines 

 at the anterior margin. Cornea (in alcoholic specimen) bluish- 

 black. Inner antennae ; peduncle with a few weak spines at 

 distal end of segments. Outer antennae ; peduncles with strong, 

 forwardly projecting spines. Scale lined on inner margin with 

 long, closely set hairs and prolonged into a ciliated bristle. 

 Flagella more than twice the length of body. Third maxillipedes 

 when extended reach a little further than extremity of rostrum ; 

 the three distal segments about equal in length. 



First pair pereiopods wanting in my specimen. Second pair 

 slender, chelate, segments of equal length. Third pair of similar 

 proportions to those in 5. hispidiis ; chelae 7 mm. long ; pro- 

 podos laterally compressed and somewhat triangular in cross 

 section, broad above ; on the dorsal margin a double row of 



