PART II. CASSINiE. NASSINJE. 299 



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

 minentj callous, and detached rim ; inner lip inflected, 

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

 aperture narrow, irregular, {fig. 65. «.) 

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



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



tuberosa. Mart. 38. f. 382. fasclata. 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. lb. 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. lb. 35. fig. 363. 

 pyrmn. 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. lb. f. 2. 



SuB-FAM. 3. NASSINiE. 



Generally small ; the 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 Zflw. 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. lb. 405. f. 1. 



Oniscidia Sow. General shape of Cyprcecassis, but less 

 ventricose, the base more attenuated, and the canal 



* But in the aberrant genera it is shorter. 



