205 
there are likewise several exceptions ; but the osseous fishes, I be- 
lieve, afford numerous examples, especially among the Salmonide and 
Scomberide. Thus I have recently examined the blood of the Com-" 
mon Tunny (Thynnus vulgaris), weighing about 320 Ibs., and the 
corpuscles were rather smaller than those of the Mackerel (Scomber 
scomber). ; 
I have also had an opportunity of examining some of the cast skin 
of the Salamander, which has been thrown off since the arrival of the 
reptile at the Gardens. The subjoined are drawings I have taken of 
this and of the cast skin of the Triton cristatus : fig. 1 represents the 
former and fig. 2 the latter, magnified 60 diameters. 
Fig. 1. 
It will be seen that the epidermoid cells in both are hexagonal, 
and that those of the Salamander (fig. 1) are more than double the 
size of those of the Triton (fig. 2); the former measuring about 
4}pth of an inch in diameter, the latter about 5}yth. It will be 
curious hereafter to observe the relative proportion of these cells to 
the blood-globules in other reptiles. 
I purpose placing before the Society at an early period a compa- 
rative estimate of the size of the blood-corpuscles of this Gigantic 
Salamander, and those of the Siren, Lepidosiren, Proteus, and other 
reptiles. 
April 24th, 1860. 
Dr. Gray, V.P., in the Chair. 
Mr. Bartlett exhibited a series of the eggs of Struthions birds, 
including those of the Northern and Southern Ostrich, the American 
and Darwin’s Rhea, the Common and Spotted Emeus (Dromeus 
nove hollandie and D. irroratus), the Common Cassowary, and the 
Mooruk (Casuarius bennettii). The latter had been laid in the 
Society’s Gardens on the 21st of April by the bird received from 
