PRO.— STR.] 



BRACHIOPODA. 



691 



forming with the deltidium a subrostral 

 vault; the inner spoon-shaped plate, 

 spondylium, is supported by a stout 

 median septum and two smaller lateral 

 septa, which meet it at the lines of 

 angulation; the umbonal cavity is di- 

 vided into five chambers ; brachial valve 

 shallow, depressed - convex ; cardinal 

 i area narrow ; delthyrium broad ; dental 

 sockets widely separated ; crural plates 

 narrow and nearly parallel to the hinge- 

 line ; cardinal process simple, linear, 

 prominent, and at its union with the 

 crural plates there is a subtriangular 

 thickening supported by a median sep- 

 tum ; surface striated ; no fold or sinus. 

 Type P. apicalis, Whitfield, described at 

 the same place from the Calciferous 

 Gr. 

 Productella minneapolis, Sardeson, 1892, 

 Bull. Minn. Acad. Nat. Sci., vol. 3, 

 p. 332, Trenton Gr. It does not belong 

 to this genus. 



pyxidata is from the Kinderhook Gr. 



semiglobosa, Nettleroth, 1889, Kentucky 

 Foss. Shells, p. 70, Up. Held. Gr. 

 Productus blairi, S. A. Miller, 1891, Advance 

 Sheets 17th Rep. Geo. Sur. Ind., p. 79, 

 Chouteau limestone. 



nodocostatus, P. raricostatus and P. rush- 

 villensis, Herrick, 1888, Bull. Denison 

 Univ., vol. 4, p. 19 to 23, Waverly Gr. 



pileiformis, McChesney, 1859, New Pal. 

 Foss., p. 40, Kaskaskia Gr. 

 Pseudocrania anomala, Hall says, is a mis- 

 nomer, that the shell described is a 

 streptorhynchoid, whatever that means. 

 Renssel^eria condoni, R. johanni and R. 



laevis, refer to Newberria. 

 Retzia ashlandensis, Herrick, 1888, 

 (Rhynchospira ashlandensis,) Bull. 

 Denison Univ., vol. 3, p. 25, Waverly Gr. 



circularis, R. plicata and R. triangularis, 

 S. A. Miller. 1892, Advance Sheets 18th 

 Rep. Geo. Sur. Ind., p. 61, Chouteau 

 limestone. 



sobrina, Beecher & Clark, 1889, Mem. 

 N. Y. St. Mus., p. 61, Niagara Gr. 

 Rhinobolus, (mispelled Khynobolus,) Hall 

 has shown, in Pal. N. Y., vol. 8, p. 44, 

 why this genus is distinct from Tri- 

 merella, and that it should be restored 

 with R. galtensis as the type, and he de- 

 fined R. davidsoni from the Niagara Gr. 

 Rhynchonella alleghania, Williams 1887, 

 Bull. No. 41, U. S. Geo. Sur., p. 87, 

 Waverly Gr. 



belliformis, R. louisvillensis, R. rugicosta, 

 R. saffordi var. depressa, R. tenuistri- 

 ata, Nettleroth, 1889, Kentucky Foss. 

 Shells, pp. 73 to 82 ; louisvillensis and 

 tenuistriata from the Up. Held. Gr., the 

 others from the Niagara Gr. 



colletti, S. A. Miller, 1892, Advance Sheets 

 18th Rep. Geo. Sur. Ind., p. 57, Niagara 

 Gr., and R. kokomoensis from the 

 Waterlime Gr.. 



he vis, R. medialis, R. striata, Simpson, 

 1889, Trans. Am. Phil. Soc, pp. 443, 



444 ; kevis from the Clinton Gr., the 

 others from the Waverly Gr. 

 minnesotensis and sancta, Sardeson, 1892, 

 Bull. Minn. Acad. Nat. Sci., vol. 3, 

 p. 333, Trenton Gr. 



Rhynchospira ashlandensis, see Retzia ash- 

 landensis. 



Roemerella, Hall, 1892, Pal. N. Y., vol. 8. 

 p. 137. Proposed as a subgenus to in- 

 clude Discina grandis. 



Skenidium, (should be spelled Scenidium,) 

 anthonense, Sardeson, 1892, Bull. Minn. 

 Acad. Nat. Sci., vol. 3, p. 333, Trenton Gr. 



Schizocrania, helderbergia, Low. Held. Gr. 

 S. schucherti, Hud. Riv. Gr., Hall, 1892, 

 Pal. N. Y. vol. 8, p. 179. 



Siphonotreta minnesotensis. Hall, 1892, 

 Pal. N. Y., vol. 8, p. 177, Trenton Gr. 



Spirifera byrnesi, S. davisi, S. dubia, S. foggi, 

 S. hobbsi, S. knappana, S. macconathi, 

 Nettleroth, 1889, Kentucky Foss. Shells, 

 pp. 109 to 122 ; foggi from the Niagara 

 Gr., the others from the Up. Held. Gr. 

 capax is from the Kinderhook Gr., and 



is not a synonym for S. parryana. 

 carteri was so poorly defined that it could 

 not be recognized, and it is now claimed 

 by some that it is the same as Syrin- 

 gothyris typus. The name should be 

 dropped from the list, 

 deltoideus, S. tenuispinatus, Herrick, 



1888, Bull. Denison Univ., vol. 4, p. 27, 

 Waverly Gr. 



disjuncta var. occidentalis, Wbiteaves, 

 1891, Cont. to Can. Pal., vol. 1, p. 222, 

 Devonian. 



subventricosa, McChesney, 1860, New Pal. 

 Foss., p. 44, 1865, pi. 1, fig. 4, Coal 

 Meas. 



texta, see Syringothyris texta. 



winchelli, Herrick, 1888, Bull. Denison 

 Univ., vol. 3, p. 46, Waverly Gr. 

 Spiriferina depressa, Herrick, 1888, Bull. 

 Denison Univ., vol. 3, p. 47, Wa- 

 verly Gr. 

 Streptorhynchus ingequale, Hall, 1858, 

 (Orthis insequalis,) Geo. Iowa, p. 490, 

 Kinderhook Gr. 



subsulcatum, Sardeson, 1892, Bull. Minn. 

 Acad. Nat. Sci., vol. 3, p. 335, Trenton 

 Gr. ; desideratum, (Orthothetes desider- 

 atus), Hall, 1892, Pal. N.Y., vol. 8, p. 345, 

 Waverly Gr., and S. ulrichi, p. 351, 

 Kaskaskia (ir. 

 Stricklandinia louisvillensis, Nettleroth, 



1889, Kentucky Foss. Shells, p. 65, Ni- 

 agara Gr. 



subquadrata, Herrick. Not properly de- 

 fined. 



Stringocephalus burtoni, Defrance, 1827, 

 Diet, des Sci. Naturelles, vol. 51, p. 102, 

 and 1891, Cont. to Can. Pal., vol. 1, 

 p. 235, Devonian. 



Strophalosia keokuk, Beecher. 1890, Am. 

 Jour. Sci. and Arts, Ser. 3, vol. 40, 

 p. 244, Keokuk Gr. 

 radicans, Winchell, 1866, (Crania radi- 

 cans,) Rep. Low. Penin. Mich., p. 92, 

 Ham. Gr. 



