CARCINOLOGICAL STUDIES. 11 



postero-lateral ones and armed , behind the extraorbital teeth , 

 with four triangular teeth. The two first are subacute, the 

 two posterior ones very acute, almost spiniform , and some- 

 what directed forward. The penultimate tooth projects a 

 little more outward than the last , so that the cephalothorax 

 presents its greatest width at the penultimate teeth. The 

 margins of these teeth are ornamented , especially at their 

 base, with acute conical granules, and the antero-lateral 

 teeth are also somewhat granulated above. The postero- 

 lateral margins are nearly straight and somewhat granulated. 

 There is, finally, a transverse sinuated groove immediately 

 before the posterior margin of the cephalothorax. 



The lateral parts of the under surface of the cephalo- 

 thorax are covered with long hairs , especially in the middle 

 and posteriorly; they are also somewhat granulated. 



The second joint of the outer foot-jaws is marked with 

 the usual longitudinal furrow near and parallel with the 

 inner margin ; this furrow reaches neither to the anterior , 

 nor to the posterior margin of the joint. The third joint 

 is slightly broader than long and quadrangular; its an- 

 terior margin is straight , the external margin very slightly 

 concave. The outer foot-jaws are almost smooth, though 

 punctate. 



The sternum is smooth , shining and somewhat punctate , 

 especially anteriorly. The male abdomen is five-jointed. 

 The penultimate joint is somewhat longer than broad, the 

 terminal joint obtusely rounded and a little shorter than 

 broad at its base ; the abdomen is smooth , except the 

 lateral sides of the basal segment which are granulated. 



The legs resemble those of Etisodes Electra. The right 

 chelipede is the larger in both specimens. The arms project 

 scarcely beyond the lateral margins of the cephalothorax. 

 Some small acute teeth are observed on the upper margin, 

 which is clothed with long hairs ; the anterior margin 

 presents a few acute granules, but the infero-external mar- 

 gin is rounded and unarmed. The distal margin of the 

 outer surface is also somewhat hairy. The arms are for 



JNotes Iroiu tlie I-ieydeii JVIuseiiixi, Vol. XIIII. 



