CHAPTER XI.—continued. 
SECTION 
ANALYTICAL INDEX. 
The whole body susceptible of great alterations, PAGE 
Food of the Doris, 
Propagation, , 
Embryo contained in aiete spherical ova—a shell so 
minute as to be called the Nautiline, 
No similitude to the parent, . 
The Doris and the Murex antiquus, compared, 
Spawn of the Murex, 
Changes in the ova of the Tetonial 
The branchiz few and simpler than in adults, 
Plates XX XVIII. XX XIX. explained, 
2. TRITONIA CERVINA, 
Form of remarkable kind, 
Messrs Alder and Hancock, Miiller, 
Description, 
Spawn, 
Plate XL. eepleed! 
II.—Triron1, 
1. Trrronra PInNATIFIDA—The Crested Doris—The Crested 
Tritonia, 
General description, 
Length, figure, &c., of the ana 
Account of specimens, 
Dr Johnston, Montagu, 
Food, 6 
Subject to mutilation of the ie anchie, 
Plate X LI. explained, 
2. Trivonra punctata—The Speckled Tritonia, 
Has striking analogies to the preceding, 
Animal described, 
Spawn, 
Plate XLI. Seanad, 
Animal resembles the Doto coronata, 
3. TRITONIA DIVARICATA, 
Length, breadth, &c., 
Regeneration, 
Plate XLI. aids 
286 
287 
288 
ib. 
