56 Proceedings of the Royal Physical Society. 
The atloid consists of nasal 23, cartilage 24, rhinal 25. 
Before concluding this hasty communication, the atten- 
tion may be directed to prepared disarticulated crania of the 
cod, as representing the osseous fishes. 
I. That by Mr Flower of London, according to the views 
of Professor Owen. 
II. That prepared by Mr Davies, of the Natural History 
Museum, Edinburgh, according to the system advocated in 
this paper. 
It will be seen that in the No. I. Professor Owen has 
omitted the occipital vertebra altogether, having mistaken 
it for the atlas, but as it closes in the par-encephalic or 
cerebellar cavity, as shown in No. II. in its proper rela- 
tion with the distinct cranio-vertebral characters. This, of 
course, renders the numbers used by Professor Owen in- 
correct, as may be seen by referring to the tables where the 
names adopted in this paper are so arranged as to show the 
synonyms of Owen, Huxley, Bertrand, and the Nos. of 
Cuvier, where the homologous bones, according to the dif- 
ferent authors, can be identified. (See Table, p. 49.) 
On the Thoracic Zones and Limbs of Osseous Fishes. 
The temporal zone 46-48 inclusive, and its limb, is at- 
tached to the anterior margin of the scapula 53, described 
as the tympano-mandihular arch (Owen) ; the scapula or 
epitympanic (Owen) — the suspensorium (Huxley) — sup- 
porting the opercular bones of fishes. 
The temporal of Cuvier will be found to represent the 
mammal temporal as well as the scap)ula, advanced and 
articulated with the mastoid (10). It is more varied in its 
shape, and, besides the coracoid and glenoid processes for 
the union with the clavicle (54) and the hrachium (55), it 
projects another forward to support the temporal 46, 47, 
and the cond^yle maxillce (49), all connected by squamous 
suture. 
Professor Owen has hazarded a wilder homology in regard 
to the pectoral fin of the ichthyologist. In this he follows 
