268 MELANIID^l. 



Unfortunately not quite adult. A large, tumid form, appar- 

 ently even more aberrant than the above-quoted figure, or than 

 any of the varieties figured by Kobelt. 



Sub-Genus NIGRITELLA, Brot. 

 Conch.- Cab. II, 1874, type M. nigritina, Morelet. 



55. Melania [Nigritella] guineensis. 



Melania guineensis, Reeve, Icon. fig. 142, I860, " Coast of Guinea." 



var. minor. 



4 Liberia ; coll. Dr, H. Dohru [23, 9 J]. 



56. Melania [Nigritella] decoUata. 



Melania decollata, Lamarck, Hist. 1822, Riv. de la Gttyane ; fide Brot = 

 M. erosa, Philippi [not Less] = M. sculptilis, Reeve. 



3 La Guayra ; coll. A. Morelet, Esq. 



Sub-Genus PAOHYCHILU8, Lea. 

 P. Zool. 8. 1850, p. 179, type P. cumingii, Lea [as Genus now.]. 



57. Melania [Pachychilus] largillierti. 



Melania largillierti, Philippi, Abb. I. 1845, Centr. America ; fide Brot. -M t 

 rusticula, Busch and M. rubicunda, Reeve. 



var. intermedia. 



Melania intermedia, von dem Busch, Philippi, Abb. J, 1845, " Lacus 

 Nicaragua. " 



2 Guatemala j coll. A. Morelet, Esq. 



58. Melania [Pachychilus] conica. 



Melania conica, d'Orligny, Hist. Nat. Cuba, 1841; fide Brot-M. nlgrata 

 Poey, Mem. Cuba II, 1852 = M. scarabus, Rv., Icon., Hal. ? = M. 

 gemella, Rv.; Icon., Cuba=M. attenuata, [Anthony], Reeve, Icon., Cuba. 



5 Cuba ; ex c. Dr. F. Stoliczka [ex Landauer]. 



2 Cuba; ex c. Dr. F. Stoliczka [labelled " M. nigrata, Poey."]. 



