336 MOLLUSCA. SOLENOSTOMATA. Tornatella. 



Gen. ANCILLARIA. — Shell oblong, subcylindrical ; aper- 

 ture longitudinal, effuse ; separating line not canaliculated. 



1. A. aveniformis Oval, elongated, smooth ; spire acute ; varix with two 



{)laits ; extension of the inner Mp short ; aperture little more than half the 

 eugth of the shell, inner lip extended over about one-third of the exposed 

 part of each whorl ; surface shining. — Sower. Min. Conch, t. xcix. middle 

 figures. — London Clay, 



2. A. turr'itella. — Subcylindrical, with an acute subturrited spire, minutely 

 and transversely striated ; upper part of each whorl shining, middle minute- 

 ly decussated ; an obscure spiral sulcus near the varix ; pUlar with three 

 plaits, and one deep sulcus — Sower. Min. Conch, t. xcix. larger figures. — 

 London Clay. 



3. A. subulata. — Subulate, smooth and shining; spire and base polished ; 

 spire elongated^ acute ; the varix at the base of the pillar striated. — Sower. 

 Min. Conch, t. cccxxxiii — London Clay and Upper Marine Formation. 



TORNATELLAD^. 



Gen. LXIX. TORNATELLA.— Body-lip simple ; separat- 

 ing line canaliculated by the inflection of the edge of the 

 whorl ; with a corneous lid. 



301. T. fornatilis. — Whorls eight; spirally striated; the pil- 

 lar with one fold, near the retral extremity. 



Buccinum parvum, List. Conch, t. dcccxxxv. f. 58. — Voluta tornatilis, 

 Linn. Syst. i. 1187. Mont. Test. Brit. 231 — In Sandy bays. 

 Length fths of an inch ; purplish red, with two white spiral bands; body- 

 whorl large, the others forming a short conical spine ; aperture contracted be- 

 hind by the projection of the body-whorl ; outer lip thin, slightly rounded. 



EXTINCT SPECIES. 



1. T. NocB. — Oval, transversely striated ; with one plait near the extre- 

 mity of the pillar ; striae equidistant, numerous, impressed, obscurely decus- 

 sated ; lip sulcated within. — Acteon Noae, Sower. Min. Conch, t. ccclxxiii.— 

 In Crag, 



2. T. cwspirfaiMS.— Subcylindrical, smooth; spire immersed, cuspidated; 

 one plait upon the pillar ; aperture nearly the whole length of the body 

 whorl. — A. cusp. Sower. Min. Conch, t. cccclv.— Oolite at AnclifFe. 



3. T. acutus Subcylindrical, smooth ; spire conical acute ; one plait up- 



on the pillar A. acutus. Sower. Min. Conch, t. cccclv. f. 2. — At Anclifte. 



Probably the young of the preceding. 



4. T. crenatus. — Ovate, elongated, spiraUy striated ; pillar minutely crena- 

 ted. — A. cren. Sower. Min. Conch, t. cccclx. f. 1 — Lmichn clay. 



6. T.striatus, — Ovate, acute, spirally striated; pillar without a plait; 

 striae not punctated A, str. Sower. Min. Conch, t. cccclx. f. 2 — Cray. 



