386 MR. G. S. BRADY ON NEW OR IMPERFECTLY 



valves covered with irregular, sinuous, projecting laminEe, the free edges of which are 

 variously cut and cleft. 



Length 4^ in. ("GS mm.). 



Hab. Australia, 14 fathoms. 



7. CvTHEREis spiNosissiMA, n. sp. (PI. LX. fig. 10, a~e.) 



Valves compressed, oblong-oval, twice as long as broad. Dorsal and ventral margins 

 nearly parallel, slightly arched. Anterior margin obliquely rounded, bearing five or six 

 large, blunt teeth. Posterior margin narrower, rounded, bearing about eight blunt 

 teeth and one very long pointed spine at the ventral angle. Dorsal aspect ovate, with 

 irregularly dentated outline and tapering extremities. Surface of the valves beset with 

 blunt processes, which are crowded together in irregular rows, producing a resemblance 

 to the growth of a lichen or nullipore. 



Length ^ in. (1 mm.). 



Hab. Norway (Messrs. M' Andrew and Barrett's dr edgings). 



This species approaches in general aspect C lichenopora, Bosquet ; but the ventral 

 aspect, instead of being marked with rows of excavations (as in C. lichenopora), bears 

 several series of stout, sharp spines. 



Family CYPRIDINID^. 



Genus Cypridina, Milne-Edwards. 



Eyes two ; antennte two ; feet two pairs. Abdomen terminated by a broad lamellar 

 plate, armed with claws and spines. Carapace consisting of two distinct valves ; pro- 

 duced in front into a more or less prominent beak, with a subajacent hollow or notch 

 facing the ventral margin. 



1. Cypridina japonica, n. sp. (PI. LXII. fig. 8, a-d.) 



Carapace oval, obscurely pointed behind. Dorsal and ventral margins both well 

 arched, the former most strongly. Anterior extremity broad and well rounded, with a 

 large, acutely pointed beak ; the underlying notch large, cuneate. Ventral profile 

 oblong-oval, twice as long as broad, the notch forming a transverse, oblong depression 

 at the anterior extremity. End view oval. Surface smooth, distantly and slightly 

 pitted. Colour light buff, mottled with patches of white and brown. 



Length -^o in- (2"54 mm.). 



Hab. Japan. Taken in the towing-net {Mr. A.Adams). 



2. Cypridina elongata, n. sp. (PI. LXII. fig. 9, a-d.) 



Valves oblong-oval, twice as long as broad, mucronate behind, flattened in front. 

 Dorsal and ventral margins gently arched. Posterior extremity produced into a 

 flattened, triangular lamina. Beak small, sharp, with a rounded, shallow notch. Dorsal 



