BRACHYPODELLA, S.-G. AMPHICOSMIA. 53 



Helix (Cochlodina) gracilicollis FER., Prodr., p. 61, no. 505 

 (nude name) ; Hist., pi. 163, f. 10. Clausilia truncatida 

 LAM., An. s. Vert., vi, pt. 2, p. 113 (April, 1822). DELESSERT, 

 Recueil, pi. 27, f. 11. Urocoptis trunculata BK., Index, p. 

 83. Clausilia gracilicollis DESK., in Lam., p. 197. Cylin- 

 drella gracilicollis. Fer., PFR. in Wiegmann's Archiv fur 

 Naturg., 1840, i, p. 41; Phil. Abbild., i, p. 179, pi. 1, f. 6 

 (1844)'; Conchyl. Cab., p. 43, pi. 5, f. 1-3 (bad) ; Monogr., ii, 

 p. 376 ; iii, 574 ; iv, 704 ; vi, 378. BLAND, Ann. Lye. Nat. Hist, 

 of N. Y., xi, 1874, p. 82 (axis). CROSSE, Journ. de Conch., 

 1891, p. 146. 



The size varies within wide limits, and the supersutural 

 whitish tubercles, while characteristic, are often much re- 

 duced, very few in number, and 011 some specimens they are 

 represented only by slight, drop-like thickenings of the lower 

 ends of a few stride. This was the case with Lamarck's type. 

 The first really good description was that of Pfeiffer in 1844. 



1 have been unable to find any evidence that the name gracili- 

 collis was published, with a description or figures, prior to the 

 date of Lamarck's diagnosis. 



9. B. CRISTATA (Weinland & Martens). 



Shell not rimate, fusiform, the apex slender, not truncate, 

 thin, obliquely closely costulate-striate, brownish-rose colored; 

 suture deep, simple. Whorls 14, the upper ones pale, slender, 

 median ones swollen, the last whorl free, descending for- 

 wardly, the neck with an elevated crenulate crest at the base, 

 base provided with an elevated keel. Aperture oblique, sub- 

 circular, angular at the base and outer margin ; peristome ex- 

 panded, whitish. Length 12, diam. 3, aperture with perist. 



2 mm. (Martens). 



Haiti: neighborhood of Jeremie (Weinland). 



Cyl. cristata W. et M., MARTENS, Malak. BL, vi, 1859, p. 55. 

 PFR., Monogr., vi, p. 386. 



This unfigured species must be near to, if not identical with, 

 B. truncatida Lam. According to Von Martens, it differs 

 from B. goiddiana Pfr. in the structure of the neck. Where 

 the last whorl deviates from the preceding, a crest begins on 



