COILOSTELE. 345 



ened above, robust, dilated, sublamellose within; margins 

 joined by a rather strong callus. Length 4, diam. 1 mm. 

 (Bgt.). 



Spain: drift of the Guadalquivir at Seville. 



Coalestele servaini BGT., Deser. Coel. p. 16, 1880. 



Var. tumidula Bourguignat. 



This species is characterized by a ventricose, slightly obese, 

 scarcely scalariform shape, the whorls convex, a little swollen 

 around the upper part. In tumidula the not very regular 

 striag which are not oblique but nearly vertical, are here and 

 there a little stronger. The swollen, slightly obese shape dis- 

 tinguishes it well from servaini, which is lanceolate-scalari- 

 forrn with a deep suture. Length 3.5, diam. 1 mm. Guadal- 

 quivir river at Seville. (Bgt.). 



C. tumidula BGT., Descr. Orel., p. 17. 



10. C. LETOURNEUXIANA Bgt. 



Quite recognizable by the lanceolate-acuminate shape, with 

 its whorls convex, deeply separated by a deep suture without 

 being scalariform; its aperture elongate, narrowed, the colu- 

 mella with a large, spirally descending fold within. Ele- 

 gantly ribbed, the ribs oblique, regularly spaced, disappear- 

 ing at the summit. Length 4, diam. 1 mm., whorls 8 or 9. 

 (Bgt.). 



Spain : Guadalquivir at Seville. 



Coclestele I., BGT., Descr. Coal. p. 18. 



Var. raphidia Bgt. 



Very distinct from the preceding, notably by its more 

 acuminate shape, different costulation (elegantly costate, the 

 ribs strong, oblique, regularly spaced, smaller on the upper 

 whorls, evanescent at the summit), semi-spheric aperture, 

 rounded only on the outer side, and nearly straight from the 

 upper insertion of the lip to the base of the columella; the 

 columella with no appearance of a fold, etc. Length 4, diam. 

 1.25 mm., whorls 8 to 9. Guadalquivir at Seville. (Bgt.). 



C. raphidia BGT., Descr. Coel., p. 19. 



