230 
DALL. 
the three pages after the title are concerned, but the cover 
was surcharged with diagnoses in April, 1839, and with 
another lot December, 1839. Four more were printed with¬ 
out a date (about Sept., 1841, probably) on the fourth page 
of some copies, and other copies have the second and third 
pages of cover blank and only the four diagnoses' on the 
fourth page. This last form, I believe, belongs, strictly 
speaking, only to number 2 in its last state (see Medial 
Tert., p. 82), but is sometimes found bound up with No. 1. 
The collation is as follows, the first page of cover: 
No. 1. | Fossils | of the | Medial Tertiary | of the | United 
States. | [Figure of Ecphora.] | By T. A. Conrad. | Jan., 
1838 [in Ms.] | Philadelphia: | Judah Dobson, 108 Chest¬ 
nut St. | 
Title page follows: 
Fossils | of the | Tertiary formations | of the | United 
States. | Illustrated by figures. Drawn from nature. | By 
T. A. Conrad, | Paleontologist of the State of New York; 
Member of the Academy of | Natural Sciences of Philadel¬ 
phia ; of the Imperial Society | of Natural History of Mos¬ 
cow, Etc., Etc. | — | Philadelphia: | J. Dobson, 108Chestnut 
Street. | E. G. Dorsey, Printer. | 1838. | 
On reverse of the title is copyright notice dated 1838. On 
the following [unpaginated] page is an unsigned dedication 
of 14 lines to Samuel George Morton, M. D. On page v is 
“ Introduction,” followed by an account of the “ Medial 
Tertiary formation,” which closes (p. xvi) with a list of the 
recent species which occur in it, and of fossils in it common 
to Europe and Asia, and ends with a “ Table of the Tertiary 
formations.” The pagination then changes, and on page 1, 
headed “ Fossils of the Medial Tertiary formation, <fcc.,” the 
description of species begins and extends to p. 32. Then 
follow plates 1-17. The following species are described on 
the third page of the cover, printed April 16,1839 : Serpula 
virginica, Oliva idonea, Fulgur maximus, Cardium virginia- 
num, C. acutilaqueatum, Venus latisulcata , Cytherea staminea, 
