GEOLOGICAL SURVEY OF THE TERRITORIES. 297 



10. Inoceramus (undetermined species 5 ) ; Cache la Poudre River, near Greeley, Den- 

 ver and Pacific Railroad. Cret., No. 3. 



11. Inoceramus aultus, Meek ; near Medicine Bow Station, Pacific Railroad. Cret., 

 No. 3. 



12. Cucullcea (undetermined species) ; Dodson Ranch. Cret. No. 2. 



13. Modiola Pedernalis, Roemer ; Near Coalville. Cret., (?) 



14. Nuculana (undetermined species) ; Near Coalville. Cret., (?) 



15. - Pachymya (?) truncata, Meek, (new species, see description,) (?) 4. Exact localiy 

 unknown. 



16. Crassatellina oblonga, Meek, (new species, see description); twelve miles south- 

 west of Salina, Kansas, Professor Mudge. Cret. No. 1. 



17. Unio Nebrascensis, Meek (new species, see description) ; opposite Sioux City, Da- 

 kota County, Nebraska. Cret. No. 1. 



18. Area (?) parallela, Meek (new species, see description) ; twelve miles southwest 

 of Salina, Kansas, Professor Mudge. Cret. No. 1. 



19. Yoldia microdonta, Meek (new species, see description) ; twelve miles southwest 

 of Salina, Kansas, Professor Mudge. Cret. No. 1. 



20. Cardium pauperculum, Meek (new species, see description) ; near Fort Bridger, 

 Wyoming. Cret. No. 2. 



21. Cardium Kansasensis, Meek (new species, see description) ; twelve southwest oi 

 Salina, Kansas, Professor Mudge. Cret. No. 1. 



22. Cardium (Protocardia) salinens, Meek (new species, see description) ; twelve miles 

 southwest of Salina Kansas, Professor Mudge. Cret. No. 1. 



23. Cyrena (Corbicula?) nucalis, Meek (new species, see description); twelve miles 

 southwest of Salina, Kansas, Professor Mudge. Cret. No. 1. 



24. Cyrena (Corbicula?) subtrigonalis, Meek (new species, see description); twelve 

 miles southwest of Salina, Kansas, Professor Mudge. Cret. No. 1. 



25. Mactra (?) Cafionensis, Meek (new species, see description.) 



26. Tapes Wyomingensis, Meek (new species, see description) ; mouth Deer Creek, Wy- 

 oming. Cret. No. 4. 



27. Tellina subscitula, Meek (new species, see description) ; twelve miles southwest 

 of Salina Kansas, Professor Mudge. Cret. No. 1. 



28. Tellina (?) mactroides, Meek (new species, see description) ; twelve miles southwest 

 of Saliua, Kansas, Professor Mudge. Cret. No. 1. 



29. Leptosolen Conradi, Meek (new species, see description) ; twelve miles southwest 

 of Salina, Kansas, Professor Mudge. Cret No. 1. 



30. Anchura(?) (undetermined species) ; Dodson's Ranch. 



31. Turritella Martinezensis, Gabta (?) ; Coalville, Utah. 



32. Turritella Kansasensis, Meek (new species) ; twelve miles southwest of Salina, Kan- 

 sas, Professor Mudge. Cret. No. 1. 



33. Anisomyon centrale, Meek (new species); Valley of Fountain Creek and Box Elder 

 Creek, Colorado. Cret. No. 4. 



34. Pleurotomaria (?) (undetermined species) ; near Coalville, Utah. 



35. Turbo Mudgeanus, Meek (new species) ; twelve miles southwest of Salina, Kansas, 

 Professor Mudge. Cret. No. 1. 



36. Baculites compressus, Say ; Fountain Creek, Colorado City. Cret. No. 4. 



37. Baculities ovatus, Say; Fountain Creek, Colorado City, Miser Station, and Como. 

 Cret. No. 4. 



38. Scapliites (Discoscaphites) Conradi, Morton 6 ; Fountain Creek, Colorado City. Cret. 

 No. 5. 



39. Scapliites (Discoscaphites) Cheyennensis, Owen; Fountain Creek, Colorado City. 

 Cret. No. 5. 



40. Scapliites nodosus, Owen ; Fountain Creek, Colorado. Cret. No. 4. 



41. Scapliites Warrenanus, M. and H. ; Medicine Bow River. Cret. No. 2. 



42. Ammonites (undetermined, not a typical ammonite.) Fountain Creek, Colorado. 



5. This is a rather large, longitudinally oblong or depressed suboval, very gibbous, equivalve species, 

 ■with a long, straight hinge line, and with posterior side long and subtruncated or more or less obliquely 

 rounded. Its beaks are equal, very gibbous, oblique, depressed, and almost terminal, while its internal 

 casts only show more or less irregular, sometimes obscure, concentric undulations. It seems to be dis- 

 tinct from all of the previously known far- western species, and if new may be called I. oblongus. 



6. This is the type of a group of Scaphites, for which I have proposed (Proced. Am. Phil., Soc, xi, p. 

 429) the name Discoscaphites, compared with the typical species of Parkinson's genus, such as *S. cequalis, 

 Sowerby, these shells are seen to differ in having the characteristic extension of the body volutions so 

 very slightly developed that they have often been referred to the genus Ammonites. They also differ 

 in having the peripheny, especially in the adult, more or less flattened, and the sides of the volutions 

 occupied by numerous small nodes, arranged in regular revolving rows. The group includes two sec- 

 tions, the first of which (represented by S. Conradi) has the volutions so broad and deeply enveloping 

 as to leave only a very small umbilicus, while the second (represented by S. [Disco.] Cheyennensis, Owen, 

 and Ammonites [Disco.] Mandanensis, Morton) has a wider umbilicus, with the body volution very nar- 

 row and but little enveloping. 



7. This may be regarded as the type of a group of Ammonites, for which I proposed (Proc. Philos. 

 Soc, xi, p. 429) the name Placentocerus. Compared with Ammonites bisulcatus, Bruguiere (which it 

 seems to me should be regarded as the type of that genus, because it was long back cited alone as the 

 typical form by Lamarck.) This shell will be observed to differ remarkably in several respects, par- 

 ticularly in its broad, profoundly-enveloping volutions, with flattened non-costate sides, and very nar- 



