PYA. SAN.] 



LAMELLIBRANCHIA TA. 



509 



sao, Hall, 1884, Pal. N. Y., vol. 5, pt. 1, p. 



132, Chemung Gr. 

 sinuosa, Hall, 1884, Pal. N. Y., vol. 5, pt. 



1, p. 130, Up. Chemung Gr. 

 spatulata, Hall, 1884, Pal. N. Y., vol. 5, 



pt. 1, p. 144, Up. Chemung Gr. 

 spio, Hall, 1884, Pal. N. Y., vol. 5, pt. 1, 



p. 137, Chemung Gr. 

 thalia, Hall, 1884, Pal. N. Y., vol. 5, pt. 



1, p. 148, Up. Chemung Gr. 

 thetis, Hall, 1884, Pal. N. Y., vol. 5, pt. 1, 



p. 135, Chemung Gr. 

 trigom 



alls, Hall, 1884, Pal. N. Y., vol. 5, 

 pt. 1, p. 140, Chemung Gr. 

 van uxemi, Hall, 1884, Pal. N. Y., vol. 5, 



pt. 1, p. 151, Up. Chemung Gr. 

 PYANOMYA, S. A. Miller, 1881, Jour. Cin. 

 Soc. Nat. Hist., vol. 4, p. 318. [Ety. 

 pyanos, a bean ; Mya, a genus.] Equi- 

 valve, elongate, inequilateral, fragile, 

 edentulous ; ligament external. Type 

 P. gibbosa. 



faberi, n. sp. Shell small, equivalve, in- 

 equilateral ; length tivice as great as 

 height ; cardinal and basal lines sub- 

 parallel ; anterior end sharply rounded 

 into the subelliptical base ; posterior 

 end broadly rounded ; valves ventri- 

 cose in the middle ; beaks obtuse ; um- 

 bonal ridge prominent, subangular, dis- 

 tinctly denned, and directed to the 

 postero-basal mar- 

 gin ; ligament exter- 

 nal; hinge-line 

 straight behind the 

 beaks and inclined 

 in front; no es- 

 cutcheon or lunule. 

 Surface marked very 

 faintly by concen- 

 tric lines of growth. Distinguished 

 from P. gibbosa by the angular um- 

 bonal ridge, less acute anterior end and 

 straight cardinal line behind the beaks, 

 and other particulars. Hud. Riv. Gr., 

 Cincinnati, Ohio. Collected by Charles 

 Faber. 



gibbosa, S. A. Miller, 1881, Jour. Cin. 

 Soc. Nat. Hist., vol. 4, p. '318, Hud. 

 Riv. Gr. 



FIG. 912. Pyanomya 

 faberi. Right valve 

 and dorsal view. 



FIG. 913. Pyanomya gibbosa. Left valve 

 and dorsal view. 



PYRENOMCEUS, Hall, 1852, Pal. N. Y., vol. 2, 

 p. 87. [Ety. pyrenos, Nucula ; omoios, 

 similar ; from its resemblance in general 

 form to the shells of the genus Nucula.] 

 Equivalve,inequilateral;umbonesprom- 

 inent, beak elevated ; muscular impres- 

 sion near the anterior extremity ; gen- 

 eral form of Nucula without the teeth 

 that characterize that genus, or the clavi- 

 cle of a Clidophorus. Type P. cuneatus. 

 cuneatus, Hall, 1852, Pal. N. Y., vol. 2, p. 

 87, Clinton Gr. 



SANGUINOLARIA, Lamarck, 1801, Syst. An. 

 sans Vert. [Ety. from the type Solen 

 sanguinolentus.] Oval, compressed, 

 rounded in front, attenuated and 

 slightly gaping behind; hinge teeth 

 f small ; siphonal inflection deep, con- 

 nected with the pallial line; ligament 

 external, on very prominent fulcra. 

 Type S. sanguinolentus. Typical spe- 

 cies S. diphos. Not American Palaeo- 

 zoic. Species left under this name for 

 want of material to determine generic 

 relations. 



FIG. 914. Saiiguinolaria diphos. 



leptogaster, Winchell, 1863, Proc. Acad. 

 Nat. Sci., p. 18, Marshall Gr. 



rostrata, Winchell, 1865, Proc. Acad. Nat. 

 Sci., p. 129, Marshall Gr. 



sectoralis, Winchell, 1862, Proc. Acad. 

 Nat. Sci., p. 422, Marshall Gr. 



septentrionalis, Winchell, 1862, Proc. 

 Acad. Nat. Sci., p. 421, Marshall Gr. 



similis, Wiuchell, 1862, Proc. Acad. Nat. 



Sci., p. 421, Marshall Gr. 

 SANGUINOLITES, McCoy, 1844, Synop. Garb. 

 Foss., Ireland, p. 47. [Ety. Sanguino- 

 laria, a genus ; lithos, stone.] Subequi- 

 valve, oblong, elongated, margins sub- 

 parallel or a little arched upward ; sides 

 compressed or diagonally gibbous from 

 the beak backward ; beaks small, an- 

 terior; hinge nearly as long as the 

 shell, margin inflected to form a long 

 posterior lunette ; surface wrinkled ; 

 large, oval adductor impression in front 

 of the beak surmounted by a small re- 

 tractor ; posterior adductor large, super- 

 ficial ; cartilage external ; pallial im- 

 pression entire ; shell thin. 



FIG. 915. Sanguinolites obliquus. 



acutus, see Goniophora acuta. 



seolus, see Sphenotus seolus. 



amygdalinus, see Glossites amygdalinus. 



arciformis, see Sphenotus arciformis. 



borealis, Winchell, 1862, Proc. Acad. Nat. 

 Sci., p. 415, Marshall Gr. 



brookfieldensis, Dawson, 1883, Rep. on 

 Redpath Museum, p. 11, Subcarbon- 

 iferous. 



burlingtonensis, Worthen, 1884, Bull. No. 

 2, 111. St. Mus. Nat. Hist., p. 14, and 

 Geo. Sur. 111., vol. 8, p. 129, Burling- 

 ton Gr. 



