ANALYTICAL INDEX. 



CHAPTER XL continued. 



The whole body susceptible of great, alterations, PAGE 273 



Food of the Doris, .... 274 

 Propagation, ... . ib. 

 Embryo contained in white spherical ova a shell so 



minute as to be called the Nautiline, . . 278 



No similitude to the parent, . . 279 

 The Doris and the Murex antiquus, compared, . ib. 



Spawn of the Murex, .... ib. 



Changes in the ova of the Tritonia, 280 



The branchiae few and simpler than in adults, . ib. 



Plates XXXVIII. XXXIX. explained, . 281 



2. TRITONIA CERVINA, 



Form of remarkable kind, . . ib. 



Messrs Alder and Hancock, Miiller, . ib. 



Description, . ib. 



Spawn, 



Plate XL. explained, 284 



SECTION II. TRITONIA, 



1. TRITONIA PINNATIFIDA The Crested Doris The Crested 



Tritonia, .... ib. 



General description, . . ib. 



Length, figure, &c., of the pinnatifida, ib. 



Account of specimens, ib. 



Dr Johnston, Montagu, . ib- 



Food, . 286 



Subject to mutilation of the branchiae, . ib. 



Plate XLI. explained, 287 



2. TRITONIA PUNCTATA The Speckled Tritonia, . ib. 

 Has striking analogies to the preceding, . ib. 

 Animal described, ib. 

 Spawn, ...... ib. 



Plate XLI. explained, . 288 



Animal resembles the Doto coronata, ib. 



3. TRITONIA DIVARICATA, ib- 

 Length, breadth, &c., ib. 

 Regeneration, ... . ;b. 

 Plate XLI. explained, . ib. 



