187 



Oyth. 



, Em.A.G. 



d 1855 



Cytherina crenulata. Emmons' American Geology, Vol. 

 1, part 2, page 220, woodcut fig. 75, d, c, greatly 

 magni-fied (see the little oval between the figures) 

 representing the hinge or dorsal side. Valves 

 extended back, and forming apparently a 

 groove. — Irenton limestone formation at Mid- 

 dleville, eastern New York. //. c. 



Cytheri7ia fabulites. See Leperditia fabulites. IIL I. 



Cytherina pennsylvanica. See Leperditia pennsylvanica, 

 and Beyrichia pennsylvanica. Rogers, page 

 823, fig. 699 V a. — The figures here given are 

 Rupert Jones' Lep. gihhera^ var. scalaris^ found 

 R.^9a. in black Salina shale. V c. 



Cytherina pusilla. Ireland. Compare Leperditia car- 

 bonaria. XL 



Cytherina and other fossils in the Lower Silurian limestones 

 of Nittany Valley in H. D. Rogers' Bellefonte section, Centre 

 Co., Pa. (1,56.)—//. 



Dadoxylon serpens. See Cordaites serpens. XLLL. 



Balmania. See Dalmanites. 



Dalmanites (Odontocheile) aegeria {Dalmania wgeria 

 Hall, 15th An. Rt. 1861, Upper Helderberg, VLLL a.) Col- 

 lected in Pennsylvania by C. E. Hall, from Marcellus and 

 Genesee. (Ms. Rt. Dec. 30, 1876)— F///5, e. 



Dalmanites bicornis. See Appendix. — Vh. 



Dalmanites boothii ( Cryphmus loothi., Green, 1837, Jour. 

 Acad. Nat. Sc, Vol. 7, LLamilton.) Two specimens, 801-25 

 (00, p. 235) collections of H. M. Chance, on Marshall's creek, 

 Monroe Co.; 804-42 (head and tail) ; 804-73 (four specimens) ; 

 804-74 (four tails) ; 804-75 (one body) ; all in the collections 

 on Marshall's creek, in LLamilton shale^ VLLl c. 

 Dalmanites eallicephalus. {Phacops callicephalus Hall, 



rff5~Pal. N. Y., Vol. 1, 1847.) Tren- 

 ton) Emmons' Am. Geo., Vol. 1, 

 ii, page 214, plate 15, figs, la, J, 

 {?; 14 or 15 rings in the body 



lobe, and 9 in the side lobes, ending in a smooth border ; 7 a 

 the head of this beautiful trilobite ; 7 c one of its eyes highly 

 magnified. — Trenton formation, LL c. 



