PART II. CASSIN^E. NASSINJE. 299 



outer lip (typically) considerably dilated, with a pro- 

 minent,, callous, and detached rim ; inner lip inflected, 

 broad, flattened, dilated in the middle, and toothed ; 

 aperture narrow, irregular, (fig. 65. a.) 

 cornuta (type). Chem. pi. flammea. En. Meth. 406. f. 3. 



184, 185. (fig. 65. a.) (Aberrant.) 



tuberosa. Mart. 38. f. 382. fasciata. Mart. 37. f. 384. 



CASSIDEA Sw. Aperture wide ; outer lip never broad 

 or flattened, but sometimes slightly inflected ; inner 

 lip spreading, but never dilated or detached beyond 

 the base into a prominent rim. (fig. 66. a.) 

 glauca. Sow. Gen. f. 1. zelanica. Ib. 18. 



plicaria. Chem. f. 1459-60. sulcosa. Seba. 68. f. 14, 15. 

 areola. En. M. 407. f. 3. granulosa. Mart. f. 344-5. 



Zebra. Chem. f. 1457-8. Saburon. Gualt. 39. g. 



decussata. Mart. f. 360-1. semigranosa. Lam. No. 23. 

 ringens Sw. Bligh, Cat. vibex. Mart. 35. f. 364-6. 



achatina. En. Meth. 407. f. 1. erinaceus. Ib. 35. fig. 363. 

 pyrum. Lam. No. 17. 



DOLIUM Lam. Shell ventricose, inflated, smooth ; spire 

 very short ; outer lip thin, not inflected ; base ge- 

 nerally truncate and emarginate. (fig. 66. 6.) 

 D. olearium. Sow. Gen. f. 1. fimbriatum. Ib. f. 2. 



SUB-FAM. 3. NASSIN^E. 



Generally small ; tbe spire longer than the aperture * ; 

 the base either truncate, or with a short recurved 

 channel; inner lip often dilated and spreading ; some- 

 times granulated, but never toothed ; a prominent ridge 

 or fold at the base of the pillar; outer lip crenated within. 



CASSIDAREA Lam. Ventricose ; spire short ; inner lip 

 spreading, and detached at the base ; outer lip thick- 

 ened within ; canal slightly lengthened, and turning 

 upwards ; representing Cassis. 

 echinophora. Ency. M. 405. f. 3. Thyrrena. Ib. 4O5. 1. 



ONISCIDIA Sow. General shape of Cyprcecassis, but Jess 

 ventricose, the base more attenuated, and the canal 



* But in the aberrant genera it is shorter. 



