348 



BRACHIOPODA. 



analoga, see Strophomena analoga. 



aspera, James, syn. for L. sericea. 



barabuensis, Winchell, 1864, (Orthis bara- 

 buensis,) Am. Jour. Sci. and Arts, 2d ser., 

 vol. 37, p. 229, and Geo. Wis., vol. 4, p. 

 171, Potsdam Gr. 



bipartita, see Strophomena bipartita. 



camerata, see Strophomena camerata. 



concava, Hall, 1857, 10th Rep. N. Y. St. 

 Mus. Nat. Hist., p. 47, and Pal. N. Y., 

 vol. 3, p. 197, Low. Held. Gr. 



decipiens, Billings, 1862, Pal. Foss., vol. 1, 

 p. 74, Quebec Gr. 



dfflecta, see Streptorhynchus deflectum. 



deltoidea, see Strophomena deltoidea. 



depressa, see Strophomena depressa. 



fasciata, see Strophomena fasciata. 



fihtexta, see Streptorhynchus filitextum. 



fragaria, syn. for Productella subaculeata. 



incrassata, see Strophomena incrassata. 



indenta, see Strophodonta indenta. 



latwosta, syn. for Tropidoleptus carinatus. 



melita, Hall & Whitfield, 1877, U. S. Geo. 

 Expl. 40th parallel, vol. 4, p. 208, Pots- 

 dam Gr. 



membranacea, see Productella hirsuta. 



mesacosta, Shumard, 1855, Geo. Rep. Mo., 

 p. 205, Trenton Gr. 



nasuta, see Strophomena nasuta. 



nucleata, Hall, 1857, 10th Rep. N. Y. St. 

 Mus. Nat. Hist., p. 47, and Pal. N. Y., 

 vol. 3, p. 419, Oriskany sandstone. 



obscura, see Strophomena obscura. 



orthididea, see Strophomena orthididea. 



planoconvexa, see Streptorhynchus piano- 

 con vexum. 



planumbona, see Streptorhynchus planum- j 

 bouum. 



plicatella, IJlrich, 1879, Jour. Cin. Soc. \ 

 Nat. Hist., vol. 2, p. 15, Utica Slate Gr. I 



plicifera, see Strophomena plicifera. 



profunda, see Strophodonta profunda. 



prolongata, Foerste, 1885, Bull. Sci. Lab. | 

 Denison Univ., p. 79, Niagara Gr. 



punctulifera, see Strophonella punctulifera. 



quadrilatera,, syn. for Strophomena rhom- 

 boidalis. 



recta, see Streptorhynchus rectum. 



rugosa, see Strophomena rugosa. 



semiovalis, syn. for L. sericea. 



sericea, Sowerby, 1839, Murch. Sil. Syst., 

 p. 636, and Pal. N. Y., vol. 1, p. 110, 

 Trenton to Clinton Gr. 



FIG. 570. Leptsena sericea. Dorsal view, and in- 

 terior of dorsal valve. 



sordida, Billings, 1862, Pal. Foss., vol. 1, p. 



73, Quebec Gr. 

 subquadrata, Hall, 1883, Rep. St Geol, 



pi. 46, fig. 32, 33, Low. Held. Gr. 

 subtenta, see Streptorhynchus subtentum. 

 tenuilineata, see Strophomena tenuilineata. 

 tenuistriata, see Strophomena tenuistriata. 



tranversalis, Wahlenberg, 1821, (A no- 

 mites transversalis,) Act. Soc. Upsal., 

 vol. 8, p. 64, and Pal. N. Y., vol. 2, p. 

 p. 256, Anticosti and Clinton Gr. 



trilobata, see Strophomena trilobata. 



victna, Castelnau, 1843, Syst. Sil., p. 39. 



Not recognized. 



LEPTOBOLUS, Hall, 1871, 24th Rep. N. Y. St. 

 Mus. Nat. Hist., p. 226. [Ety. leptos, 

 minute; Obolus, a genus.] Shell small, 

 ovate, fragile, semiphosphatic, concen- 

 trically lined; ventral valve with an 

 area and pedicel groove, muscular scar 

 elevated, subquadrate; dorsal valve 

 with trifid muscular impressions. Type 

 L. lepis. 



insignis, Hall, 1871, 24th Rep. N. Y. St. 

 Mus. Nat. Hist., p. 227, Utica Slate. 



lepis, Hall, 1871, 24th Rep. N. Y. St. Mus. 

 Nat. Hist., p. 226, Utica Slate. 



occidentalis, Hall, 1871, 24th Rep. N. Y. 

 St. Mus. Nat. Hist , p. 227, Utioa Slate. 

 LEPTOCUCLIA, Hall, 1857, 10th Rep. N. Y. St. 

 Mus. Nat. Hist., p. 107, and 12th Rep., 

 p. 32. [Ety. lejrtos, minute ; koilia, 

 belly; in allusion to the shallow vis- 

 ceral cavity.] Shell inequivalve, vari- 

 able in form, plicated, usually mesial 

 fold and sinus, substance lamellose or 

 fibrous; ventral valve convex, beak ex- 

 tended, and more or less incurved; 

 foramen terminal, the lower side formed 

 by two deltoid pieces; two strong 

 teeth, denticulated ; muscular impres- 

 sions marking a flabelliform area with a 

 thin median septum, adductor imprints 

 small ; dorsal valve flat, concave, or de- 

 pressed convex ; on each side of a strong 

 cardinal process are the deep, oblique, 

 dental fossets, from the inner margins 

 of which the crural processes proceed, 

 supported below by thickened plates, 

 extending obliquely on the border of 

 the muscular impression toward the 

 middle of the shell; muscular impres- 

 sion divided by a low median septum ; 

 the crura, in their extension, are united, 

 in a flattened disk, which terminates in 

 an acute point; on the center of the 

 cardinal side a slender process extends 

 downward, and near the junction of 

 the crura two slender processes extend 

 into the cavity of the ventral valve. 

 Type L-.flabellites. 



acutiplicata, Conrad, 1841, (Atrypa acuti- 



glicata,) Ann. Rep. N. Y., p. 54, and 

 al. N. Y., vol. 4, p. 365, Up. Held. Gr. 

 concava, see Ccelospira concava. 

 dichotoma, see Ccelospira dichotoma. 

 disparttis, see Coelospira 



disparilis. 

 fimbriata, Hall, 1859, Pal. 



N. Y., vol. 3, p. 451, 



Oriskany sandstone, 

 flabellites, Conrad 1841 Flfl . 57l . _ 



(Atrypa flabellites,) coelia flabellltes. 



Ann. Rep. N. Y., p. 



55, and Pal. N. Y., vol. 3, p. 449, Oris- 



kanv sandstone. 



