Cassis. MOLLUSCA. BUCCINIM3. 339 



lus, lire's ltuth. 308. t. xiv. f. 9.— In Carboniferous Limestone — I have ven- 

 tured to name this shell in memory of the Rev. David Ure, the author of 

 the " History of Rutherglen and East Kilbride," a work which contains the 

 best enumeration of the fossils of the independent coal formation which has 

 yet been published in this country. 



buccinim:. 



a. Right lip of the canal with a raised edge, and a groove behind ; outer 

 lip thickened, denticulated within ; pillar lip thick, spreading or 

 forming a longitudinal ridge. 

 Cassis. 

 Morio. 

 Nasa. 

 aa. Right lip of the canal obsolete. 



b. Outer lip thickened. 

 (Ricinula.) 

 Purpura. 

 Monoceros. 

 (Concholepas.) 

 Ilarpa. 



bb. Outer lip plain. 

 Dolium. 

 Buccinum. 

 Ebumea. 



Gen. LXXI. CASSIS. — Spire short ; canal slightly pro- 

 duced and recurved. 



307. C. bilineata. — Glossy brown, with spiral bands of brown 

 spots. 



List. Conch, t. Dccccxcviii. f. 63 — Buccinum decussatum, Penn. Brit. 



-Zool. t. lxxix. lower figures — B. porcatum, Pult. Dorst. 41 B. bi- 



lin. Mont. Test. Brit. 244 — Weymouth, Mr Pennant; Dunbar, Mr 

 Laskey ; very rare. 



Length from one to two inches ; whorls five or six, the upper part set 

 round with two series of tubercles ; outer lip slightly toothed ; pillar lip rug- 

 ged and granular. In a young specimen which I received from the late Rev. 

 James Lambert, Cambridge, as from Plymouth Sound, the whorls have nu- 

 merous, fine, waved, spiral striae. These are crossed by more numerous and 

 fine longitudinal striae, together with obsolete wrinkles of growth, which, on 

 the top of the spires, constitute well defined subtubercular ridges. The 

 white cover of the tube at the base of the pillar is finely granular. ° 



EXTINCT SPECIES. 



1. C. bicatenata — Ovate, ventricose, with many depressed spiral ridges, de- 

 cussated by small longitudinal costae towards the upper parts of the whorls ; 

 aperture ovate ; left lip obscurely tuberculated — Sower. Min. Conch, t. cli. 

 — Crag, 



2. C. striata.— Shell ovate; spire acute; volutions oval, longitudinally 



striated, with one obscure nodose ridge ; beak nearly straight Sower. Min. 



Conch, t. vi. ; four lower figures— London Clay. 



y2 



