TRUNCATELLA. 189 



oped basal ridge or carina are the characteristics of this 

 species. 



Both of the figures are from Chemnitz. Pfeiffer refers 

 to them as representing his species. 



TRUNCATELLA PULCHELLA Pfeiffer. 

 Plate LXXV. Figukes 1, 9, 10. 



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

 rarius hyalina, nitida, subpellucida, subtilitei" costulata ; costulis vix eleva- 

 tis, filiformibus, interstitia non a?quantibus, ad suturam inediocrem ssepe 

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

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

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

 simplex, continuum, expansiusculum, margine dextro crista levissima 

 cincto. (Pfr.) 



SYNOXYMS AND KEFEKENCES. 



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 subperf orated, 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 45, rather convex, gradually increasing 

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

 pressly cai'inated 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 1^-2, length of aperture 1| mil- 

 limetres. 



Geographical Distribution. I detected specimens of 



