S36 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 lip short ; aperture little more than half the 
ength 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 ; pUlar with three 
plaits, and one deep sulcus — Sower. Min. Conch, t. xcix. larger figures. — 
London Clay. 
3. A. 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. — Lotidon Clay and Upper Marine Formation. 
tornatelladj:. 
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. toi'natilis . — 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 l)y the projection of the body-whorl ; outer lip thin, slightly rounded 
EXTINCT SPECIES. 
1. T. iVo<».— Oval, transversely striated ; with one plait near the extre- 
mity of the pillar ; striae equidistant, numerous, impressed, obscurely decus- 
sated; lip sulcated within. — Acteon Nose, Sower. Min. Conch, t. cccixxiii.— 
In Crag, 
2. Y. cmpldatus. — 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. Subcylindrical, smooth ; spire conical acute ; one plait up- 
on the pillar — A. acutus. Sower. Min. Conch, t. cccclv. f. 2.— At Ancliffe. 
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. sifnaiws.— Ovate, acute, spirally striated; pillar without a plait; 
strics not punctated.— A. str. Sower. Min. Conch, t. cccclx. f. 2. — Crag. 
