wHiTEAVES.] LARAMIE AND CRETACEiiT S IXYERTEBRATA. 13 



maximum height of the same, thirty >rven ; exact tliickur-,^ not a-ccr- 

 tainable. 



ForlcN of Devils Pine and Three Hill- Creeks. J. B. Tyrrell. I-S4. 

 two specimens. 



Perhap- only a hroad and short variety of the preceding specie-. 

 From the same locality Mr. Tyrrell collected -even specimen- of a 

 shell which mav possibly represent a form intermediate between thi- 

 and P. simulatrix, but they are so imperfect and ixuilv pre-erved that 

 it is impo-^ible to state to what gentts they -hould be referred. 



GASTEEOPODA. 



LiMx.EA TENncdsTATA, Meek and Hayden. 



Liiiinno tenvicostaia, ileek and Hayden. Is.lij. Proe. Ac. Xat. Sc. Phil., p. 119. 

 Limrwa [AciUa) ti avicosiato , M. and H. Isijo. lb., p. 431. 



Liiiinua {Plvrdunmiu) hnuicostata, Meek. 1876. Rep. U.S. Geol. Surv. Terr., vol. 



IX., p. 534, pi. 44, figs. 13, a, b, c. 



3Iouth of the Blind Man Pdver, Township 39, Eange 27, west of 4th 

 Principal Meridian ; J. B. Tyrrell, ISSd; several characteri-tic but not 

 very perfect specimens. 



Mr. Tyrrell state- that the fo-sil- from this locality are 

 from beds which are probablj- higher in the Laramie than those 

 from which most of the other ^]lecies here described under the heading 

 A 3 were collected, but the jjrecise relationship of these beds with the 

 subdivisions adopted in the more southerly portion of the district has 

 not yet been determined. 



AcELLA. (Si^ecies undeterminable.) 



A few fragments of an Acella were collected by Dr. G. M. Dawson in 

 181-1: and 1881 from the North or Second Branch of the Milk River, in 

 the St. Mary E. Series. 



Dr. C. A. White, to whom these specimens were sent, i-egards them 

 as distinct from his A. Haldanani, but they are too imperfect to admit 

 of an accurate description of their character.-. 



June, 188-5. 



