28 PROCEEDINGS OP THE ACADEMY OP 



Spirifer hemiplicata, Hall. Stansbury's report, p. 409, pi. 4, fig. 3. Upper 

 Coal Measures near summit of hills back of Leavenworth, and at other local- 

 ities between there and Blue River. 



Spirifer lineatus. Anomites lineatus, Martin. Spirifer lineatus of Phillips. Geol- 

 Yorks., 2, p. 219, pi. 10, tig. 17, and of other authors. We have, from near 

 Leavenworth landing, in the coal measures, a Spirifer, apparently identical with 

 the above. It appears not to range very high in the upper coal measures of 

 Kansas. 



Spirifer . In division No. 12, above Fort Riley, we found a few imperfect 



specimens of a small, smooth Spirifer, similar in some respects, to S. lineatus, 

 but apparently more like Martinia Clannyana, King, from the Permian of Eng- 

 land. 



Spirifer planoconvexa, Shumard. Geol. Report, Missouri, 2d part, p. 202. 

 We found this handsome little shell quite abundant in the upper coal measures 

 (divisions 34 and 37,) at Manhattan ; also at Juniata, on Big Blue River, and near 

 summit of hills, back of Leavenworth City. 



Spirigera subtilita. (Terebratula subtilita, Hall. Stansbury's Report, p. 409, 

 pi. 4. fig. 1-2.) Spirigera subtilita of Dr. George Shumard. Trans. St. Louis 

 Acad. Sci., vol. i. 



This is a very abundant species in Kansas ; we found it ranging up, at least as 

 far as division No. 37, at Manhattan, and met with some obscure forms re- 

 sembling it, still higher in the series. From these horizons, it, ranges far down 

 in the other members of the coal measures. Several of our specimens col- 

 lected at Leavenworth City, show that it was provided with internal spiral ap- 

 pendages, as in the Spirifer, and consequently cannot remain in the genus Te- 

 rebratula, as now restricted. It has a wide geographical range, and is almost 

 everywhere the companion of Spirifer earner atus. Prof. Marcou figures it in 

 his work on the Geology of North America, pi. vi. fig. 9, from a formation in 

 the Rocky Mountains, which he refers to, the lower carboniferous ; but we have 

 never seen it from any position below the coal measures. 



Spirigera ? At Fort Riley, and above there, as well as in the same position on 



Cottonwood Creek, we found, ranging from division 18 up to 10 of the fore- 

 going section, a Spirigera resembling S. subtilita, but much more gibbous in 

 form ; it also appears to have a much thicker shell. If distinct from S. subtilita 

 this might be designated by the specific name gibbosa. 



Lamellibranchiata. 

 Monotis Hawni, Meek and Hayden. Trans. Albany Inst., vol. iv., March 2, 

 1858. Prof. Swallow thinks this species not distinct from M. speluncaria, Schot 

 sp. Although, like that species, it is quite variable, and some of its varieties 

 are very similar to it; after a careful comparison of a large number of indi- 

 viduals with King's figures and descriptions, we still regard it as distinct. We 

 have never seen any of its various forms with the beak of the larger valve ele- 

 vated so far above the hinge, as in fig. 5, 6, 7 and 8, pi. 13, of King's work. 

 Nor do any of our specimens possess the peculiar oblique posterior sulcus, seen 

 in the figures cited above. High Country, south of Kansas Falls ; also above 

 there, on Smoky Hill River and Cottonwood Creek, in division 10. 



Myalina [Mytilus) peraltenuata, Meek and Hayden. Trans. Albany Inst., vol. 

 iv., March 2d, 1858. Our description of this species was made out from one 

 of the more slender varieties of this shell, sent to us from near Smoky Hill 

 River by Mr. Hawn. We were probably wrong, however, in refering to it a 

 specimen in our possession from a locality on the Missouri, opposite the north- 

 ern boundary of Missouri; and we even suspect the rock from which this latter 

 specimen was obtained may belong to an older epoch. 



The species above cited, is we think identical with M. permianus of Swallow, 

 Trans. Acad. Sci., St. Louis, vol. i. p. 187. And we also suspect the form he de- 

 scribes in the same paper, as Mytilus {Myalina) concavus, is only a broader va- 



[Jan. 



