Class VI. MUREX. ROCK-SHELL. 279 



GENUS XXV. MUREX. ROCK-SHELL. 



Animal, a Slug. 



Shell spiral, often rough with knobs. " 

 Aperture oval ; the beak narrows into a strait 

 canal or gutter, a little ascending. * ' 



* Sutures rough, with curled scales, tail short. 



Lin. Syst. 1206. No. 526. Lin. Tr. viii. 142. 1. ERINA- 



Gm. Lin. 3530. 

 Gualtieri tah. 49. Jig. H. 



Gm. Lin. 3530. Mont. Test. Br. 250. ^^^V?- 



urcliin. 



M. with an angular shell, surrounded with tu- 

 bular ribs ; each rib ending with its mouth on 

 the angle. Consists of six spires on the whole; 

 a most rugged shell. The aperture exactly 

 oval ; the gutter or canal covered. Length near 

 two inches. Tab. Ixxix. Jig. L 



** With a strait elongated tail; gutter 

 covered. 



Lin. Tr. viii. 147- Mont. Test. Br. 25?. 2. carina- 



TUS. 



M. with five or six spires, the body ventricose : ""^" "^^ ' 

 the spires rising into angulated ridges. The 

 aperture semicircular. Length near four inches. 



