288 * GASTEROPODES. 
different specimens is very great, and the contrasting colours very orna- 
mental. It is neither rare, nor of difficult preservation. 
Prate -XLI. 
Fic. 6. Tritonia punctata, enlarged: back. 
7. Another specimen: belly, enlarged. 
8. Spawn, enlarged. 
The valuable work of Messrs Alder and Hancock contains a magnified 
view, and some account, of an animal bearing considerable resemblance to 
this species, under the name of Doto coronata, Family.3, Plate 6. But I 
scarcely think the two are to be identified as the same. 
3. TRIToNIA pIvARIcCATA.—Plate XLI. Figs. 9, 10, 11. 
Length four lines, breadth under one ; two black specks between the 
sockets of the tentacula. Two pair of branchiz rise from the back, each 
consisting of two or three stages of short obtuse cylinders, spreading 
around a central one, which is considerably larger. Colour very pale 
watery blue, with short irregular brown streaks. The tentacula extend 
far from the socket. 
The adhesion of the animal is tenacious. 
Only a single specimen has occurred. 
This, when taken in October, was mutilated of two of the tufts. 
Regeneration appeared in a week ; and it had advanced far in some 
weeks, during which the animal survived. 
Prate XLI. 
Fic. 9. Tritonia divaricata, enlarged: back, 
10. Belly. 
11, Tuft, enlarged. 
