279 
Zoophytes, now known, will yield satisfactory evidence of 
the filiation of successive forms, when the investigations of 
palaeontologists are not merely actuated by the desire to 
discover geological time-marks, and to multiply species, but 
are guided by that perception of the importance of morpho- 
logical facts, which can only be conferred by a large and 
thorough acquaintance with Anatomy and Embryology. 
But, under this aspect, the palaeontology of the Invertebrata 
has yet to be created." 
Explanation of Plate XI. 
Fig. 1. — Ommatostrephes todarus. Delle Cbiaje (ventral asi^ect). 
a. Arms (bracliia). h. Head. 
e. Eyes. m. Mantle. 
/. Funnel t. Tentacula. 
Fig. 2. — Diagram of the anatomy of a Cuttle fish. 
Buccal mass. 
Beak. 
Oesophagus. 
Salivary glands. 
Stomach. 
Pyloric coccum. 
Intestine. 
h. Anus. 
i. Liver. 
k. Ink bag. 
I. Internal shell. 
m. Gill. 
n. Heart. 
0. Ovary. 
Fig. 3. — Nervous system of Eledone cirrosa. Lamarck. 
A. Cerebral, pedal, and parieto- 
splanchnic ganglia surround- 
ing the gullet. 
a. Nerves of the arms. 
b. Auditory nerves. 
c. Nerves of the funnel. 
d. Accessory nerve of the mantle. 
e. Pidlial nerves. 
/. Visceral nerves. 
g. Branch of the visceril nerves to 
the muscles of the body. 
h. Ganglia of the branchial heart, 
t. Branchial ganglia. 
Fia. 4.— OmmatoBlrephes todarus. Delle Chiaje (oral aspect). 
a. Arms (first pair). 
6. Arms. 
c. Tentacles. 
d. Oral aperture. 
