46 BULIMULUS-ANTILLEAN. 



B. FRATERCULUS (' Fer.' Potiez and Michaud). PI. 11, figs. 24,25. 



Shell oval, oblong, perforate, fragile, fawn or clear corneous, 

 transparent ; longitudinally striated ; the epidermis being a little 

 lamellose, especially in young individuals, and these very fine and 

 very caducious lamellae cross the longitudinal striae, thus rendering 

 the shell a little rough to the touch. Spire composed of 5-6 whorls, 

 the last larger than the rest taken together. 



Aperture ovoid, angular above and slightly so below at the union 

 of the outer and inner margins ; peristome simple and sharp, a lit- 

 tle reflexed only at the umbilicus. (P. & MS). 



Alt. 12*3, diam. 5* or 6 mill. ; alt. of aperture 5'3 mill, (from 



the figures). 



Guadelupe (Fer.). 



Bulimus fraterculus Fer., POTIEZ & MICHAUD, Galerie des Moll, 

 du Mus. de Douai, i, p. 141, and Atlas, p. 14, pi. 13, f. 7, 8 (1838). 

 ? Helix (Cochlogenci) fraterculus FER., Tabl. Syst., p. 54, no. 395. 

 Conf. PFR., Symbols ad Hist. Hel., ii, p. 46, no. 202. ? B. fra- 

 terculus Pfr., Monogr. Hel. Viv., ii, 220 ; Conchyl. Cab., pi. 49, f. 

 5, 6. Probably not B. fraterculus RVE., C. Icon., pi. 63, f. 438. 



This species may be compared, in miniature and as to contour 

 only, with B. guadalupensis Lam. [exilis Gm.]. Its spire is shorter 

 comparatively, and it cannot be taken for the young of that spe- 

 cies. (P. & k). 



This species was not described by Ferussac. The first description 

 is that of Potiez and Michaud, and indicates a fragile brownish 

 shell with spiral cuticular striae, somewhat like B. diaphanus Pfr., 

 but smaller and more pupiform. Pfeiffer, some years later, de- 

 scribed a specimen from the Paris Museum, apparently Ferussac's 

 type, as follows : 



" Shell perforate, oblong-ovate, pale corneous, lusterless ; most 

 minutely decussated with growth and transverse striae ; whorls 6, 

 convex, the last a little shorter than the spire ; aperture oblong- 

 oval ; peristome simple, thin, the right margin slightly expanded, 

 columellar margin reflexed. Length 13, diam. 7 mill." 



I have been unable to identify this species with any of the shells 

 before me. The B. fraterculus of American collections, reported 

 from Porto Rico, St. Kitts, St. Croix, Antigua, St. John, St. 

 Thomas, Trinidad and Barbados, is not this species ; so the locali- 

 ties cited by Pfr. in Monogr. viii, p. 189, and by Smith, Ann. Mag. 

 (6), viii, on the authority of Bland, do not refer to the true frater- 

 culus. 



