86 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. 



Bythoceiias iuidescens, Moore. 



Bytlioceras iridencens, Moore: Proc, Roy. Soc, 1898, vol. Ixii, p. 452, 

 fig. 1 ; Proc. Make. Soc., 1898, vol. iii, p. 93, fig. 1 ; ii, pp. '2.37- 

 244, figs. 21-3 ; Nicolas, C.R. Assoc. FranQaise, 1898, 2^ partie, 

 p. 625^ fig. 9 (1899). 



Bythoceras minor, Moore. Fig. 1. 



Bythoceras minor, Moore : ii, pp. 242-4, fig. 24. 



As this species has only been very briefly referred to, I append the 

 following description. 



Shell ovate, turreted, imperforate, solid, dirty whitish, but moi'c or 

 less covered with a thin brownish olive periostracum ; spii'e elongate, 

 acuminate, turreted ; whorls 9 (exclusive of the minute protoconch, 

 which is broken off), slowly increasing, slopingly gradate below the 

 suture, scarcely curved at the sides, sculptured with oblique costas 

 (14 or 15 in number on the penultimate whorl), which are crossed by 

 spiral sulci, giving the ribs a granose appearance. The rows of 

 granules are usually five on the upper whorls and thirteen on the last. 

 The uppermost row forms a coronation at the upper part of the 

 whorls, and one or two of the granules just behind the labrum are 

 produced into a short recurved spine. The body-whorl is produced 

 anteriorly and forms a short rostration. The longitudinal ribs become 

 more or less obsolete at the middle of this whorl, so that the spiral 

 ridges upon the lower half are less distinctly granose. Under the 

 lens the entire surface of the shell is seen to be covered with minute 

 striae of growth. Aperture oblique, ovate ; peristome continuous in 

 adult specimens, smooth, glossy, iridescent, expanded, of a dirty 

 olivaceous tint, the outer margin sometimes being faiatly grooved 

 within. 



Length 30, diameter 15 mm. ; aperture 10 mm. long, 6 in width. 



This species is smaller and more coarsely sculptured than B. iri- 

 descens, and has a smaller spine above the aperture. Both the costae 

 and spiral ridges are much more numerous in that species, and the 

 granules are more bead-like. The characters of the aperture and 

 peristome are practically the same in both forms. 



Paramelania. 



Paramelania, Smith: ii, p. 558 ; Bourguignat, i, p. 67 ; ii, pp. 36, 37, 



pi. xiv, figs. 17, 18; iii, p. 198; Martens, pp. 206, 209; 



Moore, ii, pp. 244, 245, figs. 25-27. 

 Pyrgulifera, White: Nature, xxv, p. 101; Tausch, Sitzungsb. Akad. 



Wiss. Wien, 1884, vol. xc, p. 56. 

 Bourguignatia, Giraud: Bull. Soc. mal. France, 1885, vol. ii, p. 193, 



pi. vii, figs. 5-7 ; Bourguignat, i, p. 66 ; ii, p. 29, pi, xii, 



figs. 1-10; iii, p. 165; Martens, p. 207. 

 The so-called genus Bouryuignatia is, in my opinion, synonymous 

 with Paramelania. 



