A S T A C I D E A. 5^9 



Family PALINURID./E. 



Tee Palinuridse of our present seas have been divided into two 

 sections or subgenera of a single genus Palinurus, by Edwards and 

 De Haan, being called Palinuri communes and P. longicornes, and 

 into two genera by Gray. The species of these sections differ much 

 in aspect; and their distinguishing characters are believed by us, 

 sufficient to authorize the adoption of Gray's genera. 



Still a third genus, which he names Linuparus, is proposed by 

 Gray, for the Palinurus trigonus, De Haan, and the allied species. 

 These belong to the first section, and to the genus Palinurus, as 

 adopted. 



Gr. 1. Palinurus, Fair. — Carapax vix rostratus. Annulus antennalis supra 



angustissiinus, curvatus. Antennae externae basi fere contiguae. Antennae in- 



ternae flagellis breves. 

 G-. 2. Panulirus, Gray. — Carapax non rostratus. Annulus antennalis supra 



latus, subquadratus et horizontalis. Antennas externae basi remotae. Antennae 



internae flagellis longae. 



Palinurus Lalandii, Lamk. 

 Cape of Good Hope. 



Panulirus spinosus (Edw.), Gray. 

 Pacific Islands. 



Panulirus penicillatus {Olivier), Gray. 

 Pacific Islands. 



