«Cope. 354 [Jan. 5, 
ENCHODUS. Cuvier. 
Remains of species of this genus occur in the eretaceous strata of Kan- 
sas. I discovered a tooth belonging to one of them, in the matrix be- 
neath the vertebrae of Hlasmosaurus platyurus. Dr. Leidy describes a 
species* from the cretaceous formations of the Upper Missouri region, 
which he called #. shumardti. The premaxillary of a rather large spe- 
cies was obtained by my expedition, but the species is not determinable. 
The diameter of ‘the basis of the tooth is M. .012. The long tooth of a 
species of medium size was detected, as follows: 
ENCHODUS CALLIODON. Cope. sp. nov. 
Finchodus sp. Cope. Hayden’s Sury., Wyoming, etc., p. 424, 
The tooth on which this species rests is especially elegant. It is quite 
slender, and gradually contracts to the acute apex. The cutting edges, 
which extend to the base, are on one side, and are separated in one 
direction by a narrow, slightly convex, and perfectly smooth face. The 
inner face is strongly convex, being more than half a cirele from the mid- 
dle of the length downwards. This is also smooth on its anterior and 
posterior aspects, but on the inner, there are nine sharp delicate keels 
which disappear as the tooth contracts, the last terminating with the 
third quarter of the length. Total length, M. .02 ; longitudinal diameter 
at base, .0025; transverse do., .0035. The apex of the tooth is black. 
From near Fossil Spring, Western Kansas. 
@) 
ANOGMIUS. Cope. 
(Proceed. Amer. Philos. Soc., 1871, p. 170.) 
This name was applied to a genus supposed to be allied to the Sauro- 
dontida, and represented by vertebra: only. One species was named A. 
contractus, Cope, 1. ¢., which was found by Professor Mudge. I have 
seen nothing resembling these vertebrae among either of the three fami- 
lies above described, and cannot ascertain their exact affinities without 
further investigation. It is clear that they are not referable to the known 
genera of Sawrodontide nor of Stratodontide. They present a marked 
character in the crowding together of those caudal vertebres which pre- 
cede those that support the caudal fin. The centra are shortened and 
the prolonged neural and hemal arches and spines lie one on the other, 
forming a fan-shaped body. The arches do not, at the same time, become 
anchylosed. This structure is seen in the A. contractus and in a second 
and smaller species. It finds a parallel in the caudal vertebre of the 
genus Ischyrhiza of Leidy from the green sand of the New Jersey creta- 
ceous, where all the elements of this fan-shaped body, centra, spines, ete., 
are coossified into a solid mass. This will define family. A species 
haying the same structure is common in the Miocene of Maryland. In 
* Enchodus shumardii, Leidy, Proc. Ac, Nat. Sci., Phil., 1856, p. 267. isa smaller species 
than any of the Cimolichthyes here described, 
