90 
PALAEONTOLOGY OF NEW YORK. 
Externally the shell is characterized by its posterior apices, fine concentric 
striae,.and general similarity to “ Discina.” The shell-substance is tenuous and 
appears to be wholly corneous. 
Genus DISCINOLEPIS, Waagen. 1885. 
1885. Discinolepis, Waagen. Mem. Geol. Survey of India, Palaeontologia Indica: Ser. xiii, Salt-Range 
Fossils, I. Productus-limestone Fossils, iv (fas. 5), Brachiopoda, p. 749. 
Diagnosis. “ The shell is of very small size with two unequal valves, which 
are very flat, leaving scarcely any room for the animal between them. 
“ The lower ventral valve is hardly at all 
vaulted in any direction, and appears flatly 
spread out like a small fish-scale, only the 
apex is a little elevated. It is removed from 
the margin towards the median part of the 
valve. The margin of the valve nearest the 
apex is broadly cut out by a deep incision 45 - redicie-vaive. fig. \ 
reaching to the top of the. apex. 
“ The upper or dorsal valve is in shape similar to the other one, with a 
slightly elevated eccentric apex, but without an incision. 
“ The surface in both valves is either smooth or covered with a fine gran¬ 
ulation.” (Waagen, loc. cit.) 
Type, Discinolepis granulaia, Waagen. PI. lxxxvi, figs. 5-7. “ Obolus Beds,” 
Salt Range = Primordial. 
Discinolepis granulata. 
Alter Waagen. 
i. Brachial valve. 
Genus KUTORGINA, Billings. 1861. 
PLATE IV, FIGS. 10-20. 
1861. Obolus, Billings. Geology of Vermont, vol. ii, p. 946. 
1861. Kutorgina, Billings. Geology of Vermont, vol. ii, p. 948 (foot-note). 
1863. Obolus, Obolella, Billings. Geological Survey of Canada, pp. 248, 284. 
1S64. Obolella, Holl. Quarterly Journal Geological Society, vol. xxi, p. 101. 
1865. Obolus, Obolella (Kutorgina), Billings. Palaeozoic Fossils, vol. i, pp. 6, 8. 
1866. Obolella?, Davidson. British Silurian Brachiopoda, p. 62. 
1868. Kutorgina, Davidson. Geological Magazine, vol. v, p. 312. 
1871. Kutorgina, Davidson. British Silurian Brachiopoda, Appendix, p. 342. ' 
1873. Iphidea (??), Meek. Sixth Ann. Rept. U. S. Geological Survey Terr., p. 479. 
1874. Trematis?, White. Geogr. and Geol. Surv. West 100th Merid., Prelim. Rept., p. 6. 
1875. Trematis?, White. Geogr. and Geol. Surv. West 100th Merid., Final Rept., vol. iv, pt. i, p. 36. 
