Class VI. MUREX. ROCK-SHELL. 285 



Lin. Tr. viii. 14(). ib. Hi. 68. 18 _ MINU . 



TISSIMUS. 



* M. with a shell having five spirally striated 

 volutions ; ribs distant ; canal covered ; this 

 minute species inhabits the sea. 

 Pembroke. 



Gm. Lin. 3531. Mont. Test. Br. Sup. App. 170. lg. gyri- 



nus. 



* M. with a strong, brown, conic shell, of four 

 volutions, regularly covered with chesnut color- 

 ed tubercles : aperture orbicular ; minute. 



Mont. Test. Br. Sup. 114. 20# ACCINC . 



tus. 



* M. with a shell of six or seven finely striated, 

 ribbed volutions ; aperture oblong ; canal short ; 

 length four tenths of an inch ; breadth one tenth 

 of an inch. 



Frith of Forth ; extremely rare. 



Mont. Test. Br. Sup. 115. t. 30. /. 6. gj. SUBU , 



LATUS. 



* M. with a slender white shell, of about fifteen 

 scarcely raised volutions, with two rows of 

 beads, divided by a depressed line; aperture 



