450 APPENDIX TO CRUSTACEA [December, 



inferior edge; fingers striate, black, armed with obtuse 

 teelh; tibia of all the feet spinous above; tarsi hairy be- 

 neath. 



Length about nine tenths, breadth one inch and one 

 tenth. 



Found on the coasts of Georgia and E. Florida^ and 

 generally occurs concealed in a large species of gelati- 

 Trf^us alcyonium which is frequently cast up by the waves. 

 A species of Balanus is often attached to their thorax. 

 This does not agree with the description of C. spinifrons 

 as quotf^d in Rees' Cyclopaedia from Fabricius, but it 

 may possibly approach in character to that of Herbst as 

 quoted by Latreillc. In order that the truth may be as- 

 cercaintd I have given a detailed description of this ani- 

 mal, that those who may have an opportunity may judge 

 of its identity by comparison. 



I should have referred this species to the genus Eri- 

 phies, Latr. but the antennas are not remarkably elon- 

 gated, nor distant from the ocular peduncles. It cannot 

 be referred to the genus Atelecyclus, Leach, as the hands 

 arc not crested. 



Genus PINNOTHERES. 



For characters see p. 67. 



SPECIES. 



1. P. maculatum^. Body with very short desiduous, 

 dense hair; clypeus obtusely angulated, indented above 

 the tip. 



Inhabits the muricated Pinna of our coast. 



Cabinet of the Academy. 



