olO PROCEEDINGS OF THE ACADEMY OF [Sept.., 



THE MOLLUSCA OF MANDEVILLE, JAMAICA, AND ITS ENVIRONS. 

 BY HENRY A. PILSBRY AND AMOS P. BROWN. 



The mollusks enumerated below were collected by one of us (Dr. 

 Brown) during two visits to Jamaica, in February-March and May 

 of this year; on the former occasion with assistance from Mr. Steward- 

 son Brown. The material has been studied by both authors. 



While the non-marine molluscan fauna of Jamaica might be con- 

 sidered well known, since most of the species have been described, 

 yet it is really most imperfectly known. Very few forms have been 

 examined anatomically; almost nothing has been observed of the 

 relations of the many specialized forms to their environments; a 

 large proportion of the species has not been figured, and many are 

 .scarcely recognizably described. Finally, our knowledge of the 

 distribution of species is extremely imperfect. The Mandeville list 

 may therefore prove useful, both as the most nearly complete fauna 

 published for any Jamaican locality, and because definite localities 

 4ire supplied for a large number of species hitherto known from no 

 more exact habitat than "Jamaica." 



The "Contributions to Conchology" of Professor C. B. Adams was 

 for the time a work of distinguished excellence; but it has a very 

 serious defect in the omission of localities. Almost all of the species 

 of Pfeiffer, Gray and Sowerby were also described as from Jamaica, 

 without nearer localization. A list published b}' C. P. Gloyne 1 sup- 

 plies localities for some species, but often only the Parish is mentioned. 

 Mr. J. B. Henderson. Jr., 2 has given a more extended list (248 species) 

 in which the localities are carefully noted. Out of 55 species listed 

 1 >y him from " Mandeville," 1 7 were not found in our material. 3 Adding 



1 Journal de Conchyliologie, XX, 1872, p. 26; XXIII, p. 115. 



- Nautilus, VIII. LS94, pp. 1, 19, 31. See also C. T. Simpson, Proc. U. S. Nat. 

 Mus. XVII, 1894, pp. 423-440, where several new forms are described. Other 

 new species of Urocoptida>, Achatinidw and Oleacinidcp from Mr. Henderson's 

 collection have been described in the Manual of Conchology. 



? These Mandeville species which we did not obtain are: Varicella ligata, 

 Sagda cookiana, S. epistylioides, S. arboreoides, Pleurodonte ja?naicensis cornea, 

 Cepolis subconica, Urocoptis inornata, Geomelania fords, Aperostoma subrugosum , 

 A. ru pisfontis, A. crassum, Tudora proximo, Colobostylus tectilabris, C. banksianus, 

 Hclicina jamaicensis. Probably Messrs. Henderson and Simpson listed all 

 -species collected within a radius of some miles as from Mandeville. 



