30 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.54. 



The second species, Nuculites emarginata, was transferred by Hall 

 to his new genus Palaeoneilo, the shells of which "differ from Nucu- 

 lites in having no anterior clavicular ridge J ^ ^ 



The third species, iV. triqueter, the fourth, N. oblongata, and the 

 seventh, N. cuneiformis, all from the Hamilton group, Devonian, of 

 New York State, have been recognized as typical representatives of 

 Conrad's genus Nuculites.^ 



FIGURES OF THE TYPE-SPECIES. 



In the generally distributed edition of the 5th Annual Report of the 

 Geological Survey of New York, published in 1841, containing Con- 

 rad's definition of the genus Nuculites, no figures were published. 



The original plate, prepared by Conrad to illustrate the species 

 described in that report, was reproduced in the fifteenth annual 

 report of the regents of the University of New York on the state of 

 the Cabinet of Natural History with the following explanation: 



The plate is plate 2 opposite page 194, described as " Copied from 

 the original lithographic plate of T. A. Conrad, Esq." On page 193 

 it is stated that "this is a copy of the lithographic plate — which was 

 published with his (Conrad's) report in 18 41 and circulated with some 

 hut not with all the copies." 



In a footnote to page 192 is the additional remark: "I (James 

 HaU) inferred that only a small number of copies of the plate were pub- 

 lished with the report, but it may have been more extensively distributed 

 than I supposed, for I have found five copies among my own volumes." 



In the explanation of this plate, figure 7 is cited as "Nuculites 

 cuneiformis; Conrad, Annual Report, 1841, p. 50;" and figure 8 as 

 "Nuculites oblongatus, Conrad, Annual Report, 1841, p. 50." Both 

 of the figures show the anterior clavicle, and the figures of N. oblong- 

 atus shows the continuous series of crenulations on the hinge line. 



Hall, 1885, recognized Nuculites oblongatus Conrad and Nuculites 

 cuneiformis Conrad, as the types of the genus Nuculites Conrad, 1841 ,^ 

 and emended the definition with full illustration of the two species 

 (see pi. 47). 



The emended generic definition is as follows: "Nuculites, Conrad 

 (Geol. Surv. N. Y.; Ann. Rep., p. 49, 1841) Types, Nuculites oblong- 

 atus, Conrad, and Nuculites cuneiformis, Conrad. 



"Shell eguivalve, inequilateral, transverse. Anterior end rounded. 

 Posterior sometimes obliquely truncate and pointed. Beaks anterior. 

 Cardinal line arcuate. Post umbonal slope rounded or angular. Sur- 

 face marked only by concentric striae in all the known species. Hinge 

 furnished unth a row of transverse narrow teeth beginning at the anterior 



1 Prelim. Notice LamelliDranchlata, pt. 2, 1870, p. 8. 



2 Idem., p. 4. Pal. New York, vol. 5, pt. 1, Lamellibranchiata, pt. 2, pp. 26, 324, 325, and 326, 1885. 

 « Pal. New York, vol. 5, pt. 1, Lamellibranchiata, pt. 1, p. 26, 1885. 



