APPENDIX. 187 



H. — Page 157. 



SPECIFICATION OF THE SHELLS CONTAINED IN THE MARL IN WHICH THE NEWBURGH 

 SKELETON WAS FOUND, BY DR. A. A. GOULD. 



■• Limnea Galbana, say, Jour. Acad. Nat. Scien. V. 123 ; Haldeman, Monog. of Limniades, 

 p. 51, pi. 13, f. 22, 23 — allied to L. humulis, say. ' All the specimens known occur in a super- 

 ficial deposit on the margins of a pond in "Western New Jersey ; and I believe the species to 

 be extinct, with perhaps one or two others from the same locality, which will bring this deposit 

 within the tertiary period of geologists.' — Haldeman. 



" Planorbis parvus, say, Nicholson's Encycl. Amer. ed. pi. 1, f. 5 ; Gould, Inverteb. of Mas- 

 sachusetts, p. 209, f. 139 ; Haldeman, Monog. of Limn. p. 27, pi. 4, figs. 19—23. 



" Yalvata tricarinala, say, in Jour. Acad. Nat. Scien. I. ; Gould, Inverteb. of Mass. p. 225, 

 f. 156 : Haldeman, Monog. of Limn. pi. 1, f. 1' — 4. Cyclostoma tricarinata, say, Nicholson's 

 Encycl. 



" Amnicola Galbana, Haldeman, Monog. of Limn. p. 15, pi. 1, f. 9. ' Occurs fossil in the 

 fresh-water newest tertiary deposit in Sussex County, N. Jersey.' — Haldeman. 



" Cyclas Galbana, Gould, a small, inequilateral, inflated, obliquely oval species, with tumid 



■ 



beaks, and well-developed lateral teeth ; about the size of a millet-seed ; allied to Cyclas Dubia, 

 say, and perhaps identical, but certainly as much entitled to a distinct name as Limnea Galbana, 

 or Amnicola Galbana. 



" My own conviction is, that all the above-mentioned shells are identical with the recent 

 species to which they are said to be allied." 



MICROSCOPIC EXAMINATION OF THE MARL, BY DR. JOHN BACON, JUN. 



" The marl was prepared for the microscope by removing the large proportion of calcareous 

 matter by hydrochloric acid, and subsequent washing. It was ascertained by comparative trials, 

 that no organized bodies were removed in this way, except the calcareous shells and their frag- 

 ments, while the remaining subtances were brought into a much better state for examination. 



