TRUNCATELLA. 189 



oped basal ridge or carina are the characteristics of this 

 species. 



Both of the figures are from Chemnitz. PfeifTer refers 

 to them as representing his species. 



TRUNCATELLA PULCHELLA PFEIFFER. 

 PLATE LXXV. FIGURES 1, 9, 10. 



T. subrimata, oblongo-subcylindrica, gracilis, rufo-cornea vel succinea, 

 rarius hyalina, niticla, subpellucida, subtiliter costulata ; costulis vix eleva- 

 tis, filiformibus, interstitia non aequantibus, ad suturam mediocrem saspe 

 distinctioribus ; anfr. superst. 4-4i modice convexi, lente accrescentes* 

 ultimus infra medium plerumque laevigatus, basi breviter compresso-cari- 

 natus ; apertura subverticalis, oblique fere elliptica, basi subefTusa ; perist. 

 simplex, continuum, expansiusculum, margine dextro crista levissima 

 cincto. (Pfr.) 



SYNONYMS AND REFERENCES. 



Truncatella pulcheUa, PFEIFFER, in Wiegm. Arch. 1839, i. 356; in Zeitsch. f. 



Mai. 1846, p. 186; in Mon. Auric. Viv. 192; Mon. 



Pneum. Viv. ii. 8. 

 SHUTTLEWORTH, Diag. 7, p. 155 

 CHEMNITZ, ed. 2, Auric. 10, pi. ii. figs. 11-15. 



DESCRIPTION. 



Animal not observed. 



Shell subperforated, or grooved, oblongly subcylindrical, 

 light, reddish horn-color or amber, shining, pellucid, lightly 

 ribbed ; ribs scarcely elevated, threadlike, at irregular in- 

 tervals, often more distinct at the moderate suture ; re- 

 maining whorls 4 to 4|, rather convex, gradually increasing 

 in size, the last generally smooth below the middle, com- 

 pressly carinated at its base; aperture subvertical, oblique- 

 ly elliptical, enlarging at base ; perist. simple, continuous, 

 somewhat expanding, and furnished with a slight ridge at 

 its right extremity. 



Length 4^-5, diameter l-2, length of aperture Ijj mil- 

 limetres. 



Geographical Distribution. I detected specimens of 



