18 MITE A. 



in Reeve as a smooth shell. Last whorl shorter than in 

 Barclayi. 



234. petrosa (f. 314), Sowerby. — Testa crassa, alba, spira- 

 liter striata, fusiformi ; spira, pyramidata, anfractibus decli- 

 vibus, ultimo anfractu medio subventricoso ; apertura spiram 

 longitudine asquanti, ad suturam canaliculato ; labio externo 

 laavigato, crasso, antice eontracto, subangulato, brevi. — 

 Shell thick, white; spire striated, fusiform; spire pyramidal, 

 whorls sloped, last whorl tumid in middle, aperture as long 

 as spire, channelled at the suture; outer lip smooth, thick, 

 contracted anteriorly, rather angular, short. 



Sect. X. Columbelliform, with outer lip compressed; crenu- 

 lated or smooth. 



235. acuminata (f. 88*, 89*), Sivainson. 



236. coaectata (f. 99), Sivainson. 



237. fastigium (f. 435), Reeve. 



238. fuscescens (f. 303), Pease. 



239. brunnea (f. 441).— MS., Brit. Mus. 



240. aueiculoides (f. 439, 440), Reeve. — M. fastigium may 

 possibly be a variety of this. 



241. columbellifoemis (f. 255, 256), Kiener. — Shaped like 

 a columella, with the upper part of the outer lip compressed 

 and thickened. 



242. decdrtata (f. 460) , Reeve. — More angular and gibbous 

 on the upper part of the whoi'ls, with shorter spire. 



243. scutulata (f. 430, 1, 2), Chemnitz.— The shells 

 named " M. amphorella," Lamarck, are but varieties of this. 



244. oleacea (f. 101), Reeve. 



245. maculosa (f. 442, 3), Reeve. 



246. litterata (f. 436), Lamarck. — With dark letter-like 

 markings on a light ground. 



