334 MOLLUSCA. SOLENOSTOMATA. Cancillaria. 
2. M, scahra — Ovato-fusiform, rough, with decussating striae; lip thicken- 
ed with one obtuse tooth upon its margin — This probably belongs to the 
genus Collumbella — (Buccinum scabriusculum, Brander^ fl 20.) Sower. Min. 
Conch, t. cccci. — London Clay. 
3. M. Ovate, fusiform, short, transversely sulcated ; upper edges 
of the whorls defined, entire ; aperture elongated, Hp plaited within ; four 
folds on the pillar. — Sower. Min. Conch, t. ccccxxx. f. 1. — London Clay. 
4. M. pumila — Ovate, fusiform, short, transversely sulcated ; upper edges 
of the whorls defined, crenated; sulci decussated by longitudinal costae; aper- 
ture elongated ; lip, plaited within ;. four folds on the pillar.— Min. 
Conch, t. ccccxxx. f. 2. 
Gen. LXVII. CANCELLARIA. — Last whorl subventri- 
cose ; aperture ovate, ending in a short canal ; pillar plait- 
ed. 
S99. C. hyalina . — Whorls six, smooth, folds of the pillar nu- 
merous. 
Voluta hyalina, Mont. Test. Brit. Sup. 101. t. xxx. fl 1.— Found at 
Dunbar by Mr Laskey. 
Length a quarter of an inch, breadth nearly two-thirds less; pellucid, 
white ; whorls fiat, scarcely defined by the separating line, tapering to an ob- 
tuse point ; body-whorl more than half the length of the shell ; aperture con- 
tracted retrally ; outer lip nearly straight, smooth ; folds of the piUar fine 
thread-like striae, originating from behind the pillar-lip. 
EXTINCT SPECIES. 
1. C. quadrata. — Ovate elongated, cancellated, without either varices or 
beak ; two obtuse plaits on the pillar, besides the spiral edge ; outer lip sharp, 
entire, striated within — Sower. Min Conch, t. ccclx — London Clay. 
2. C. IcBviuscula. — Short, ovate, pointed, furnished with varicose sutures 
and costae, crossed by numerous obtuse elevated lines ; pillar biplicated ; aper- 
ture scarcely canaliculated.— (S'owcr. Min. Conch, t. ccclxi. f. 1. — London 
Clay. 
3. C. evulsa. — Short, ovate, pointed, furnished with varicose sutures and 
costae, crossed by several acute carinae, most elevated upon the costae ; pillar 
biplicated ; aperture scarcely canaliculated — (Buccinum evulsum, Brander, 
f. 14.) Sower. Min. Conch, t. ccclxi. f. 2, 3, 4, — London Clay. 
The two last species evidently belong to the group indicated by Brander- 
