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 



plaits; extension of the inner lip short; aperture little more than half the 

 length 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. turritella. — 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 ; pillar 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. 



TORNATELLA DiE. 



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. tornatilis. — 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 |ths 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. Noes. — Oval, transversely striated ; with one plait near the extre- 

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

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

 In Crag, 



2. T . cuspidahis. — 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 Anclilte. 

 Probably the young of the preceding. 



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

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



5. T. striatals. — Ovate, acute, spirally striated ; pillar without a plait ; 

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



