﻿168 DEVONIAN FAUNA. 



thickened, rapidly tapering. Mouth pointed above, dilate, rather produced and 

 rounded below. Outer lip convex, meeting the columella at a right angle. Shell- 

 structure thin. 



Size. — Height 34 mm., width 21 mm. 



Locality. — Wolborough. There are three specimens in the Museum of Practical 

 Geology, a fine and exactly similar specimen in the Torquay Museum, and a 

 specimen in Mr. Vicary's Collection. 



Remarks. — This shell seems to me exactly to agree with Phasianella ventricosa y 

 Goldfuss, except that the mouth is not so produced in front, and this appearance 

 may be due to the imperfection of the German specimen. 



Affinities. — These shells differ from the species next described, by their 

 much greater breadth, their more expanded mouth, and their shorter columella ; 

 from Macrochilus ventricosus, Goldf., as given by M'Coy, by their longer spire 

 and less swollen body-whorl ; and from Macrochilina elevata by their shorter 

 and slighter spire. A distinctive feature in the species seems to be the form of 

 the spire, the enveloping angle of which increases downwards, so that it is more 

 tapering at the top than near the body-whorl. M. ventricosus, Barrois, 1 is a 

 narrower shell with a larger body-whorl. 



7. Macrochilina, aff. acuta, Sowerby, sp. PI. XVII, figs. 10, 10 a. 



? 1853. Macbochiltjs oyatus, Sandberger. Verst. Eliein. Nassau, p. 234, pi. xxvi, 



figs. 16, 16 a (not Goldfuss). 



Description. — Shell rather small, elongate, slender, of about six volutions. 

 Apex sharp or acuminate. Sutures simple, linear. Spire elpngate, more than 

 half the height of the shell, regularly increasing, and very conical. Whorls 

 adpressed against the suture, otherwise moderately and evenly convex. Body- 

 whorl nearly half the height of the shell, moderately convex, curving in somewhat 

 rapidly round the base of the shell. Inner lip flattened, diffuse, probably callous. 

 Columella elongate, straight, tapering, rounded, about a quarter the height of the 

 shell. Mouth elongate, large, pointed above, extended below. Outer lip convex, 

 with its curvature increasing downwards, and meeting the end of the columella 

 almost at a right angle. 



Size. — Height 28 mm., width 15 mm. 



Locality. — "Wolborough. There is a single specimen in Mr. Vicary's Collection. 



Remarks. — This specimen is distinguished from the others that accompany it 



1 1889, Barrois, ' Faun. Calc. d'Bbray,' p. 222, pi. xv, figs. 11 a, b. 



