History of British animals - University of Guam Marine Laboratory

334 MOLLUSCA. SOLENOSTOMATA. Cancillaria.2. M. scabra— Ovato-fusiform, rough, with decussating stria?; lip thickenedwith one obtuse tooth upon its margin—This probably belongs to thegenus Collumbella.-~ (Buccinum scabriusculum, Brander, f. 20.) Sower. Min.Conch, t. cccci.—London Clay.3. M. parva.— Ovate, fusiform, short, transversely sulcated ; upper edgesof the whorls defined, entire ; aperture elongated, Mp plaited within ; fourfolds on the pillar.— Soiver. Min. Conch, t. ccccxxx. f. 1.—London Clay.4. M. pumila Ovate, fusiform, short, transversely sulcated ;upper edgesoi the whorls defined, crenated ; sulci decussated by longitudinal costae ;apertureelongated; lip, plaited within ; four folds on the pillar Sower. Min.Conch, t. ccccxxx. f. 2.Gen. LXVII. CANCELLARIA.—Last whorl subventricose; aperture ovate, ending in a short canal ; pillar plaited.299. C. hyalina.— Whorls six, smooth, folds of the pillar numerous.Voluta hyalina, Mont. Test. Brit. Sup. 101. t. xxx. f. 1.—Found atDunbar by Mr Laskey.Length a quarter of an inch, breadth nearly two-thirds less; pellucid,white ;whorls flat, scarcely defined by the separating line, tapering to an obtusepoint; body -whorl more than half the length of the shell ; aperture contractedretrally ;outer lip nearly straight, smooth ; folds of the pillar finethread-like stria?, originating from behind the pillar-lip.EXTINCT SPECIES.1. C. quadrata.— Ovate elongated, cancellated, without either varices orbeak ; two obtuse plaits on the pillar, besides the spiral edge;outer lip sharp,entire, striated within Soiver. Min Conch, t. ccclx. — London Clay.2. C. Iceviuscula.— Short, ovate, pointed, furnished with varicose suturesand costse, crossed by numerous obtuse elevated lines ; pillar biplicated ; aperturescarcely canaliculated.— Sower. Min. Conch, t. ccclxi. f. 1—LondonClay.3. C. evulsa Short, ovate, pointed, furnished with varicose sutures andcostae, crossed by several acute canaliculated— carina?, most elevated upon the costoe ; pillarbiplicated ; aperture scarcely (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.