Series in Kansas, Oklahoma and New. Mexico. 217 
Cardium mudget Cragin ? 
Cardium bisolaris Cragin. 
Cardium (Protocardia) texanwm Conrad. 
Roudaria [?| gquadrans Cragin.—The Museum contains an ex- 
ample of this species collected by Prof. A. Hyatt at Tucumcari. 
Cyprimeria sp.—This abundant species is evidently not C. 
crassa, as Prof. Cragin thought. Our collections of the Texan 
forms of this genus are not yet large enough for a revision of the 
species. 
Cytherea ? sp.—A few casts of an indeterminate Venerid. 
Tellina ? sp. 
Mactra antiqua Cragin. | | 
Corbula crassicostata Cragin, also occurs in the Paw Paw beds. 
Dentalium sp.—Represented by fragments. 
Natica sp.—A few small casts. 
Turritella sp. related to T. seriatim-granulata Roemer.—This 
abundant species does not exactly agree with Roemev’s figure 
nor with any of the four or five other similar species that have 
been described from Texas. ‘The group needs careful study with 
large collection from the entire area in order to determine 
whether we are dealing with several species or only one or two 
variable forms. ‘The variety now under consideration occurs at 
Tucumcari. 
Anchura kiowana Cragin.—A small form represented by sev- 
eral imperfect specimens. It is closely related to Anchura mudgei 
White, which occurs in the Paw Paw beds, but is apparently not 
identical with it. 
Trochus texanus Roemer.—Two specimens that are doubtless 
like the one referred to this species by Prof. Cragin. They are 
somewhat smaller than Roemer’s figure, but agree well in sculp- 
ture and form. 
Schloenbachia peruviana von Buch.—Two or three character- 
istic fragments. The species is abundant in the Duck Creek and 
Kiamitia beds at Denison. It also occurs in the Washita division 
at El Paso and is said to occur as low as the Walnut clays of the 
Fredericksburg. 
Sphenodiscus sp.—Fragments of a form that differs from S. 
pedernalis von Buch in that it has a truncated periphery. S. 
emarginatus Cragin and S. remeri Cragin are both related 
forms from the Fredericksburg and Trinity divisions, respec- 
tively, but they do not agree with each other nor with this form 
in the details of the septa. | 
A critical examination of the above list will show conclusively 
that the beds from which the fossils came belong to the Coman- 
che series and probably to the upper half of that series. To make 
closer correlation with the subdivisions of the Texas section is 
more difficult because the association of species is not exactly the 
same as in any one of those subdivisions and some of the species 
common to the two regions are known to have a considerable 
vertical range. Taken altogether, the evidence seems to indicate 
