COCHLITOMA. 93 



grown. But lately it has been proved that they were only 

 the young, by large specimens found in the same place, one 

 of which is here illustrated [pi. 26, figs. 32, 33]. As the 

 addition of the last whorl gives the whole shell a more elong- 

 ated egg-shape, the diagnosis of the species requires several 

 alterations besides that of the dimensions. The fine granu- 

 lation which covers >the upper whorls disappears close over 

 the succeeding suture upon those following, and is indicated 

 on the last two whorls only by weakly impressed lines below 

 the suture. The aperture is longer and the columella in some 

 of the grown shells is more strongly concave than in the 

 young. 



18. C. CRAWFORD: (Morelet). PI. 26, figs. 27, 28. 



Shell short-ovate, ventricose, thin; pale yellow, profusely 

 striped longitudinally with chestnut, the stripes narrow, 

 partly irregular or slightly zigzag, partly straight and in the 

 direction of growth lines ; the first 3% whorls pale fleshy and 

 without stripes; surface finely decussate-granulate down to 

 the periphery of the last whorl, the base nearly smooth. 

 Spire short, the summit large and obtuse. Whorls 6%, con- 

 vex, the suture deeply impressed and bordered with a crenu- 

 late whitish line. Aperture acuminately ovate, white and 

 showing the bands through, the outer lip thin, columella 

 somewhat concave, strongly or narrowly truncate below, 

 whitish ; parietal callous a mere transparent film. 



Length 56, diam. 26 mm. (type). 



Length 44.5, diam. 26 mm. aperture 27 mm. long. 



S. Africa: Port Elizabeth (Jas. Crawford). 



A. crawfordi MOREL., Journ. de Conchyl. 1889, p. 8, pi. 1, 

 f. 3. CLAPP, Nautilus xi, p. 69. 



This handsome little species resembles C. varicosa in having 

 the slightly oblique stripes interrupted at intervals by broader 

 variceal streaks parallel to the growth-lines, and apparently 

 marking the inception of a new period of growth-activity. In 

 some specimens nearly all of the stripes are of this character, 

 very few being noticeably oblique or zigzag. 



Mr. Clapp found young shells of about 8 mm. diameter 



