CYLINDRELLA. 151 



Affinis quidem et precedent! (C. Piloceri Pfr.) et sequenti (C. Gold- 

 fussi Mke.), tarnen carina basalo anfractus ultimi et ejus torsione tarn sin- 

 gulari, ut testarn primo aspectu sinistrorsem putes, ab omnibus distinctis- 

 sinio. 



CYLINDRELLA GOLDFUSSI PFEIFFER. 

 PLATE LXXIX. FIGURE 33. 



C. testa elliptico-oblonga, subcylindracea, apice conica, Integra, acuta ; 

 umbilicata, luteo-cornea, tenui, pellucida ; anfractibus undecim, convex- 

 iusculis, dense et tenuissime arcuatim costulatis : infimo parum protracto, 

 basi rotundato, conipressiusculo ; apertura patente orbiculato-subcordata ; 

 canaliculo brevissimo, obtuso. 



SYNONYMS AND REFERENCES. 



CylindreUa Goldfussi MENKE, in Zeitsch. f. Mai. 1847, p. 2. 



PFEIFFER, Mon. Hel. Viv. ii. 383; iii. 579. 

 PHILIPPI, Icon. iii. 17, p. 6, tab. iii. fig. 9. 



DESCRIPTION. 



Animal not observed. 



Shell umbilicated, elongated, more ventricose at the 

 middle, apex conic, not truncated, thin, diaphanous, light 

 horn-color, marked with numerous light subarcuate striae ; 

 whorls 12, scarcely convex, narrow, the last slightly ex- 

 tended beyond the body of the shell, carinated, its right 

 side somewhat furrowed, rounded at base ; aperture sub- 

 vertical, obliquely and subtriangularly pear-shaped ; perist. 

 slightly expanded at its entire circumference, its right ter- 

 mination flexuose. 



Length, 11 ; diameter, 4 mill. 



Geographical Distribution. Texas, (PfeifFer.) 



Remarks. The figure (somewhat magnified) is drawn 

 from a specimen from Mr. Eland's collection. 



In general form, it is more nearly allied to Macroceramus 

 pontificus than any other figured in the " Mollusks." 



SPURIOUS SPECIES. 



CylindreUa pontifica Gould (p. 306) is Macroceramus pontificus, 

 vid. p. 137. 



