238 RECORD OF SCIENCE FOR 1886. 



Cope, E. D. — Contiuued. 



frequently found associated with the jaws and teetb of the ' snout fishes' 

 of the Kansas Chalk, which have been described under the generic head of 

 Erisichilie Cope. Several species are known (see Bulletin U. S. Geol. Sur- 

 vey Terrs., iii, l'S87), and one of them is probably the Xipliias Dlxoni of 

 Agassiz, from the chalk of Sussex, England. These genera can not be re- 

 ferred to any of the existing orders of fishes, on account of the peculiar 

 structure of the pectoral arch. The author therefore places them in an 

 especial one, the Actinopleri (see Proceedings Amer. Assoc. Adv. Science, 

 1877-'78, p. 299). 



Cope, E. D. Upper Miocene (Loup Fork Beds) in eastern Mexico. 

 (Amer. IS'at., 1885, p. 494; Amer. Jonr. Sci., 3d ser., vol. xxxi, p. 310, 

 April, 188G. New Haven.) 

 Abstract of. 



Cope, E. D. Tlie Vertebrate Fauna of the Ticholeptus Beds. (Amer. 

 Nat., vol. XX. pp. 3G7-3G9, April, 1880. Philadelphia.) 



Gives lists of the species found in the Ticholeptus bed on the Cottonwood 

 Creek, Oregon, and iu Montana; the only species common to both lists is 

 the Blasiomeryx borcalis. The Ticholeptus horizon is interesting as that in 

 which the genus Mastodon makes its first appearance iu America. It is 

 now shown to be the last which contains the genus Anchitherium. It is 

 intermediate iu all respects between the Middle and Upper Miocene forma- 

 tions of the West, as represented by the John Day and Loup Fork beds. 



Cope, E. D. The Plagianlacidiie of the Puerco Epoch. (Amer. Nat., 

 Vol. XX, p. 451, May, 1886. Philadelphia.) 



Reviews briefly the three sftecies already described from this group, and de- 

 scribes the new species Xeoplagiaulax molcstus, from an entire inferior fourth 

 premolar. 



Cope, E. D. Notes on Phenacodus. (Geol. Mag., new ser., Decade 

 III, vol. Ill, pp. 238-239, May, 18SG. Loudon.) 



States that in the article in the Geological Magazine for February, pp. 49-52, 

 pi. II, the editor omitted to state the author's more mature views published 

 in the American Naturalist for 1885 and for 1884. 



It thus appears that Lemurine forms were the ancestors of all Placental Mam- 

 malia, as was already anticipated by Haeckel iu his far-seeing " Schop- 

 fuugsgeschichte," 



Cope, E, D. Note on Erisichthe. (Geol. Mag., new ser., Decade iii, 

 vol. Ill, p. 239, May, 1886. London.) 



Defends the use of the name Erisclitlie, against Mr. Davies's note in the March 

 number of the Geological Magazine, where he wishes him to use the name 

 I'rotosphi/rauia Leidy. 



Cope, E. D. Vertebrata of the Swift Current Creek region of the Cy- 

 press Bills. (Ann. Rep. Geol. and Nat. Hist. Surv. Canada, 1885. 

 New series, vol. i, pp. 79c-85c. Published May, 1886. Montreal.) 



The region mentioned is in the district of Assiniboina, Northwest Territory, 

 about longitude 109, latitude 49° 40'. The author considers the beds in 

 question to belong to the White River or Oligocene epoch. 



Describes the new species Menodus angustigenis, and mentions generically an- 

 other species of Aleuodtis and two species of Tistudinata, Trionyx, and Sly- 

 lemys, sp. 



