CJECILIOIDES OF SPAIN AND PORTUGAL. 17 



shorter and more strongly truncate. As the increase of the 

 whorls is regular and the convexity about equal in all there is 

 not the contraction at the left side between the penultimate and 

 last whorls, noticed in C. belonidaa. The simple peristome is 

 not thickened within, and is not patulous at the base of the 

 aperture. Length 6, diam. 1.75, aperture 2x1 mm. ; whorls 7. 



Spain: drift debris of the Guadalquivir at Seville. 



Cacilianella v. , SERVAIN, Etude ser les Moll. Esp. et Port. , 

 1880, p. 130. Locard, Ann. Soc. Agricult. Lyon, 1895, p. 

 146 (drift of the Besanyon at Saint- Armour, Jura). 



C. castroiana Locard. Shell of relatively great size, of a fusi- 

 form, long-conic shape; spire very narrow, acuminate, com- 

 posed of 6 slightly convex whorls, the first three increasing 

 slowly and regularly, the following two much larger, the last 

 whorl greatly developed, rounded at the base, three- sevenths 

 the total length. Suture impressed, with a bordering line 

 below. Summit small, obtuse, rounded. Aperture small, 

 piriform, slightly over two-sevenths the total length, contracted 

 above, well rounded at the base. Peristome simple, unex- 

 panded and acute; right margin arching a little forward, the 

 profile broadly arcuate; columellar border slightly sinuous, 

 truncate, not reaching the base of the shell; the margins joined 

 by a visible callus. Shell thin, quite solid, diaphanous^ 

 smooth, whitish. Length 7, diam. 2 mm. (Loc.~). 



Portugal: Faro, Algarve. 



Caecilianella c., LOCARD, Conchyliologie Portugaise, in Archives 

 du Museum d'Histoire Naturelle de Lyon, vii, 1899, p. 141. 



Said to be larger, more slender, longer and more conic than 

 C. acicula, with less regularly coiled and less convex whorls, 

 duplicated suture, smaller and narrower aperture, etc. 



C. ribeiroi Servain. This species is remarkable for the oblong- 

 acuminate shape of the spire as far as the two upper whorls, 

 which are cylindric; for the progressively accelerated increase 

 of the whorls, the suture also more and more steeply descending. 

 The last whorl is regularly long-convex. The aperture is quite 

 excised by the convexity of the penult whorl; columellar mar- 

 gin short, strongly projecting, strongly truncate at the base, 

 obliquely arcuate from left to right, giving the aperture in the 



UNIVERSITY 



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