STALK-EYED CRUSTACEA 435 



cut into small semicircular grooves that have hairs and 

 resemble imbricated scales. The first pair of legs the 

 longest. The abdomen has upon each segment four or 

 five transverse grooves. 

 Range. — West Indies. 



2. Panulirus. 



Pamdirns Spence Bate. 



Palinunis (part) H. Milne Edwards, 



Fabricius. 

 Pamdinis (subgenus) . . . Gray. 

 Langoustes longicornes . . . H. Milne Edwards. 



There is no central tooth in the middle line between 

 the frontal horns. The ophthalmic segment is exposed 

 and membranous. The antennary segment is greatly 

 produced in front of the frontal margin, which is generally 

 armed with strong teeth. The terminal filaments of the 

 internal antennse are long and slender. Gills as in 

 Palimirus. 



Range. — West Indies, Pacific Ocean ; in warm seas. 



Synopsis of the Species. 



I. The abdomen is grooved transversely. 

 A. The first antennary segment is armed with two 

 teeth. — (/*. guttatus.) 



B. The first antennary segment is armed with four 

 teeth. 



a. The four conical teeth remote. 



a}. Teeth large, equidistant, and forming a quadrangle. 



d^. Carapace spinose all over.^ — (P. anicricamcs.) 



b^. Teeth minute, scarcely approximate on the median 

 line, anterior and posterior much more distant. — {P. 

 argus?) 



