102 STALK-EVED CRUSTACEA 



Oceans; in warm seas, among rocks, in shallow and deep 

 water. 



Subgenus I. Lambrus. 

 Subgenus II. Pisolambrus. 



Synopsis of the Subgenera and Species. 



I. Carapace moderately convex, not produced over 

 the legs, rarely depressed ; rostrum and epistome well 

 developed ; lateral epibranchial spine small or absent ; 

 first pair of legs elongated ; palm and fourth joint with 

 strong spines ; pterygostomian regions sometimes slightly 

 excavated and carinated. — (Subgenus Lauibrus^ 



A. Fourth joint of walking legs spinose or tubcrcu- 

 lated. — (Z^. pourtalesii.) 



B. Fourth joint of walking legs without spines or 

 tubercles. 



a. Carapace broader than long, without angles at the 

 sides. — (Z. agonus.) 



b. Carapace with antero-lateral edges with eight to 

 nine teeth, last tooth long. — (A. scrratus^ 



II. Carapace rounded; eyes very large; basal joint 

 of internal antenna; large and swollen ; basal joint of 

 external antennae very small ; the efferent orifice of the 

 branchial chamber is continued in a canal on the ptery- 

 gostomian region. — (Subgenus Pisolambrus?) 



c. Carapace quite smooth. — {L. nitidus?) 



Subgenus Lambrus. 



Lambrus ... A. Milne Edwards,. Micrs. 

 Platylambrus . . Stimpson. 

 Rhinolambrus . A. Milne Edwards. 



Carapace moderately convex, and not produced over 

 the base of the legs, rarely depressed, with the rostrum 



