Zoology. 139 
Thirty-eight species. Puppigerus embraces all of the Chelones 
described by Owen and Bell from Sheppey. To Zytoloma perhaps 
belong the two Chelones described and figured by Faujis and 
Cuvier from the Cretaceous of <r named Ch, cretacea by 
Seeger and Ch. Faujasti by Maa 
On Discosaurus pk its allies ; by Di J. Ley. (Proc. Acad. 
Nat Sci. — 1870, p. 18). —On the 5th of April, Dr. Leidy 
made remarks on Discosaurus and its allies, additional to those 
published at 392 of the last volume of this Jo urnal; and in the 
urse of it discusses the relations of Cimoliasaurus, as or iginally 
established, to Discosaurus. On this point he observes: 
probably contributed to ie ar cap Cope in his examination of 
the sie of the Kansas sau 
“The vertebral specimens ail to Cimoliasaurus consisted of 
two sets ot specimens, from two different individuals, both from 
the aie of Burli ngton Co., N. J. ey are described in 
those of figs. 10-18 more anterior cervical 
“The cervicals of Cimoliasaurus are so different i in their propor- 
tions from those of the Kansas saurian that there can be no ques- 
tion as to the distinction of the two animals, at least as speci 
“Do all the remains originally referred to ‘Discosaurus belong to 
this genus as distinct from Cimoliasaurus? I suspect that those 
from New J aioe to the latter. The animals indicated by 
all the fossils which have been under consideration are Plesiosau- 
roid, and, as in d species of Plesiosaurus, there is much 
variability i in the number, proportions, and other characters of the 
cervicals without a correspon extent of variation in other parts 
of the vertebral column, we would be prepared to find in Cimolia- 
ind of i in Discosaurus. 
“ Prof. Cope, in his ‘ Synopsis of the Extinet Batrachia and Rep- 
tilia,’ pt. i, mee Ra 56, describes two vertebral specimens from 
the lower bed of he Cretaceous us green sand of Gloucester saidk Mon- 
sie ‘counties, which he —caagersicie ~ a species with the name of 
aurus orient sla ea cribed as caudals are 
seen, by —— with the" Staranss ibsletan, to be cervicals.” 
The a rred to in aper—all Cretaceous—are ~ 
as follows: 1. osaurus vetustus tesla (Cimoliasaurus magn 
and C, ‘tiny of t Coney from Alabama. 2. Disc, ius (E (Bri 
