398 CRUSTACEA [October, 



Cabinet of the Academy. 



Body, the transverse le .s than half of the longiiudinal 

 diameter; segments narrower before and rounded, acute 

 behind; edge not thickened; antenna not robust; abdo- 

 tnen, segments suddenly narrower than the thoracic seg- 

 ments, subequal, the posterior ones gradually narrower, . 

 terminal segment dilated, lanceolate, a transverse impres- 

 sed line at base, longitudinally carinated, carina obsolete 

 towards the base, inner terminal joint of the lateral ap- 

 pendices triangular, outer one linear somew^hat obliquely 

 truncated at tip. 



Length three fourths of an inch. 



Found cast on the beach of Cumberland island, 

 Georgia. 



5. C. ociilata*. Body elongate- oval; head trilobate 

 behind, middle lobe smallest; abdomen, segments not , 

 shorter than the terminal thoracic ones; tail, terminal scg4^ 

 ment shorter than the four preceding segments con- 

 junctly. 



Inhabits the Sheepshead. ' ■ 



Cabinet of the Academy. 



Body, transverse less than one third of the longitudi- 

 liiil diameter, lateral line forming a perfectly regular un- 

 interrupted curve, segments gradually narrower to the' 

 base of the terminal segment, those of the abdomen and i 

 tail not shorter than the terminal thoracic ones; colour 

 -whitish with very numerous brown points; head broader , 

 than long, regularly rounded before, edge not thickened 

 beneath, trilobate behind, middle lobe rather smallest; 

 eyes large, conspicuous, fascetts regularly hexagonal; 

 taiU terminal segment hardly broader than the preceding, 



