NO. 1199. CR USTA CEANS OF WEST A FBICA—BA TRB UN. 295 



Family PARTHENOPIDJE. 



KEY TO THE WEST AFRICAN GENERA OF THE FAMILY PARTHENOPID^. 



A. Carapace uot laterally expaudedso as to conceal the ambulatory legs.. Lamhr us. 

 A'. Carapace more or less expauded to form a vault in which the ambulatory legs 

 are concealed Heterocrypta. ' 



Genus LAMBRUS Leach. 



KEY TO THE WEST AFRICAN SPECIES OF THE GENUS LAMBRUS. 



A. Carapace much wider than long macrochelos. 



A'. Carapace nearly as long as wide. 



B. Carapace very convex and tuberculated massena. 



B . Carapace more depressed and sparingly granulated Mcarinatus. 



LAMBRUS MACROCHELOS (Herbst) . 



Cancer macrochelos Herbst, Natur. Krabben u. Krebse, I, 1790, p. 254, pi. xix, 



fig. 107. 

 Lamhrus mediterraneus Roux, Crust. Mddit., 1828, p. (20), pi. i. 

 Lamiriis macrocheles Ortmann, Zool. Jahrb., Syst., VII, 1893, p. 414. 



Range. — Mediterranean Sea; West Africa. 



West African locality. — Liberia, 49 fathoms (Stucler). 



LAMBRUS MASSENA Roux. 



Lambrus massena Roux, Crust. Medit., 1828, p. (25), pi. xxiii, figs. 7-12. 



Lambrus (Parthenopoides) massena Miers, Ann. Mag. Nat. Hist. (5), VIII, 1881, 



p. 207. 

 Lamhrus {Partlienolamirus) massena Miers, CftaHeuf/er Rept., Zool., XVII^ 1886, 



p. 100. 



Range. — Mediterranean; West Coast of France; Azores (Barrois); 

 Azores, off Fayal, 50 to *.)0 fathoms (Miers) ; West Africa. 



West African localities. — Canaries; St. Vincent, Cape Verde Islands 

 (Miers); Goree Bay, Senegambia, 9 to 15 fathoms (Miers). 



Variety GOREENSIS Miers. 



Lamirus massena var. goreensis Miers, Ann. Mag. Nat. Hist. (5), VIII, 1881, p. 

 374=Variety Spinifer, idem., p. 208. 



Differs from typical massena in having the prominent tubercles of the 

 gastric, cardiac, and branchial regions developed into blunt spines. A 

 similar spine exists near the distal end of the upjDcr surface of the arm, 

 and the upper surface of the palms is strongly granulated and tuber- 

 culated (Miers). 



West African locality. — Goree Island, Senegambia (Miers). 



Variety ATLANTICA Miers. 



Lamirus massena var. atlanticus Miers, Ann. Mag. Nat. Hist. (5), VIII, 1881, p. 

 208; Challenger Rept., Zool., XVII, 1886, p. 100. 



Front much less prominent than in typical forms, more deflexed and 

 rounded at its distal end; the regions of the carapace less convex and 



