1890.] Zoblogy. 487 
Through the kindness of Dr. O. Boettger I have received a skull of 
Lepidochelys olivacea, “from West Africa, for examination. Later I 
found in the collection of the Smithsonian Institution a skull of a sea- 
tortoise from Ventosa Bay, Mex., collected by Prof. Sumichrast, of the 
same genus. 
Lepidochelys olivacea Eschsch. is distinguished from Lepidochelys 
(Colpochelys) empii Garman, by the very much more expande 
pterygoids, and the large ectopterygoid processes. There are no ridges 
on the alveolar surfaces of the upper jaw, and there is an indication 
of a median keel at the symphysis of the lower jaw. 
The specimens on which the genera Euchelys, Girard, and Ony- 
chochelys, Gray, have been established I do not know, neither do I 
know Gray’s genera, Cephalochelys and Eremonia. Chelonia depressa 
Garman, which is considered by Boulenger as a synonym of Chelonia 
mydas, Without indication of any reason whatever, a thing very often 
repeated by Mr. Boulenger, does not belong to the genus Chelonia at 
all. Through the kindness of Mr. Garman, I have examined the 
type, which is represented by a stuffed specimen. The lower jaw has 
a greatly developed hook very re like Lepidochelys Rempit.Garman, 
but there is a median ridge on the symphysis, something like Lefido- 
chelys olivacea Eschsch, Until the skull of this species is known, it is 
impossible to decide whether it belongs to Thalassochelys, Lepido- 
chelys, or, what I think probable, to a new genus. 
Chelonia muitiscutata Kuhl is possibly an abnormal specimen of 
Lepidochelys olivacea Eschsch. Kuhl described this species after a 
specimen in Groningen. According to a letter kindly received from 
Prof. Van Anhum (dated Nov. 21, 1887), none of the collections at 
Groningen contain the original, 
There is a great number of species of Cheloniida, which have been 
described by different authors ; future examinations will show whether 
these species are in existence or not. There is no doubt whatever 
that the Chelonia from the Pacific is a different species from the 
Atlantic; the skulls are the same, but there are great differences in 
the form of the carapace. I have seen a great number of young 
specimens of Chelonia collected by the Albatross on the Galapagos 
Islands. These have 1—6 peculiar dermal plates between the margin- 
alia and the infra-marginalia. I propose to call these plates sudmar- 
ginals. It remains to be decided whether this species is the same as 
Chelonia agassizii Boc., or not.—G. Baur, Ph.D 
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