ANALYTICAL INDEX. 359 
CHAPTER XI.—continued. 
Spawn, . : : : . PAGE 315 
Plate XLV. explained! : : : ib. 
Note—other species, besides the above, have boone) ib. 
I,—Fan-head Eolis, : 3 2 ; é ib. 
Length, &e., : : : ib. 
Of a dingy eolous with white precks é . 318 
Plate XLV. explained, . 6 5 ¢ ib. 
IJ.—A black animal, ascribed to the Doridean tribes, : ib. 
Description, : : ib. 
Dr Johnston proposed to name it Denapgitce nigra, . ib. 
Messrs Alder and Hancock reclaimed it, . 6 ib. 
THE NAUTILINE. 
General remarks—difficulty of tracing animal life from its 
earliest form, : 319 
Can trace no immediate connection ‘between the spawn and 
the Doris itself, ; ib. 
The Nautiline exist in the spawn, but fever that fee it 
cannot be traced, . : : ¢ 320 
Statement of facts, . A 322 
Nautiline apparently the ares of the Don yet it may 
be allied to the Animalcula infusoria. ; 325 
Plate XLVI. explained, . . : : 326 
