Dr. J. E. Gray on Tortoises. 143 



being very irregular in size and number. In fact they are 

 not stri^, properly speaking, at all, but simply concentric 

 crumplings or corrugations of the capsule. 



I need not discuss here further the affinities and structure of 

 D. campanulafaj as I have not yet detected the species in the 

 shales of the Quebec group. It is, however, the commonest 

 species which occurs in the anthracitic shales (Upper Llan- 

 deilo) of the south of Scotland. 



Corynoides calicularis^ Nich. (?) 

 Numerous examples of a species of Corynoides^ Nich., occur 

 in a bed of black shale at Point L^vis ; but their state of pre- 

 servation is such as to render their specific determination 

 impossible. They agree very well in their dimensions with 

 G. calicularis, Nich. (Geological Magazine, vol. iv. p. 107, 

 pi. vii.), which is an abundant fossil in the Upper Llandeilo 

 shales of Dumfriesshire, Scotland. It is quite possible, however, 

 that more perfect examples will show that the Quebec species 

 is distinct. 



Caryocaris, sp. 

 It is very interesting to notice the occurrence in the Point- 

 L^vis shales of a species of the Crustacean genus Caryocaris, 

 Salter, this genus being exceedingly characteristic of the cor- 

 responding formation of the Skiddaw Slates of the north of 

 England. The state of preservation of the Quebec specimens 

 is such as to render their specific determination hazardous and 

 uncertain ; and I prefer therefore to leave them undescribed at 

 present. Upon the whole they closely resemble small speci- 

 mens of Caryocaris Wrightii, Salter (Quart. Journ. Geol. Soc. 

 vol. xix. p. 139) ; but it is probable that they will turn out to 

 be distinct. None of my specimens shows more than the cara- 

 pace, and that considerably crushed. 



XVIII.— iVofes on Tortoises. By Dr. J. E. Gray, F.K.S. &c. 



Testudinella Horsjieldii. 



General Goldsmid has kindly presented to the British Mu- 

 seum a small and a larger specimen of the shell of a tortoise, 

 the large one wanting the front of the sternum, from Rud-I- 

 Mil, Chuh Suguti to Duruh, in Persia, which were collected 

 on March 23rd, 1871 ; they evidently belong to this species, 

 thou2;h we have not the animal to determine the number of its 

 claAvs. 



The two specimens are exceedingly like Peltastes grcecus in 

 general character, but are much more depressed, and the horny 



