424 



GASTEROPODA. 



[POR. RAP. 



Mfoi*. ii»*fc 



Fig 



704.— Porcellla 

 puzosi. 



Porcellia, Leveille, 1835, Mem. Soc. Geol. 

 France, vol. 2, p. 39. [Ety. proper 

 name.] Discoid, depressed ; whorls 

 very slightly embracing, exposed in a 

 very wide umbilicus, slightly deeper on 

 one side than the other, from a trifling 

 obliquity of the first one or two turns; 

 a narrow band extends along the 

 middle of the exterior, ending in a nar- 

 row slit in the lip; surface often nodu- 

 lar and ornamented with rough striae. 

 Type P. puzosi. 



crassinoda, White & 

 Whitfield, 1862, Proc. 

 Bost. Soc. Nat. Hist., 

 vol. 8, p. 303, Kinder- 

 hook Gr. 

 hertzeri, Hall, 1876, 11- 

 lust. Devonian Fobs., 

 pi. 16, and Pal. N. Y., 

 vol. 5, pt. 2, p. 126, 

 Up. Held Gr. 

 nais, Hall, 1862, (Gyroceras nais,) 15th 

 Rep. N. Y. Mus. Nat. Hist, p. 68, and 

 Pal. N. Y., vol. 5, pt. 2, p. 127, Che- 

 mung Gr. 

 nodosa, Hall, 1860, Supp. to vol. 1, 



Et. 2, Iowa Geo. Sur., p. 92, Kinder- 

 ook Gr. 



obliquinodus, White, 1862, Proc. Bost. 

 Soc. Nat. Hist., vol. 9, p. 2l, Mar- 

 shall Gr. 



peoriensis, Worthen, 1884, Bull. No. 2, 

 111. St. Mus. Nat. Hist., p. 6, and Geo. 

 Sur. 111., vol. 8, p. 138, Coal Meas. 



rectinoda, Winchell, 1863, Proc. Acad. 

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



rotatoria, Hall, see Goniatites plebei- 

 formis. 



scioto, Hall & Whitfield. 1873, 23d Rep. 

 N. Y. Mus. Nat. Hist., p. 240, Up. 

 Held. Gr. 



senex, see Platyceras senex. 

 Pskudophorus, Meek, 1873, Ohio Pal., vol. 

 1, p. 221. [Ety. pseudes, false ; Phorus, a 

 genus. Shell depressed, subtrochiform ; 

 umbilicus broad, shallow, eccentric ; 

 volutions two or three ; suture obscure ; 

 aperture transversely rhombic, three 

 times as wide as high, acutely angular 

 at the outer and inner extremities; 

 upper side of lip oblique and extended 

 forward ; surface bearing lines of growth 

 directed obliquely backward. Type P. 

 antiquus. 



Fig. 705.— Pseudophorus antiquus. 



antiquus, Meek, 1871, (Trochita antiqua,) 

 Proc. Acad. Nat. Sci. Phil., p. 82, 

 and Ohio Pal., vol. 1, p. 221, Up. 

 Held. Gr. 



Pupa, Humphrey, 1797, Museum Calonni- 

 anum, and Lamarck Syst. Anim. sans 

 Vert., p. 88. [Ety. Pupa, chrysalis Bhell.] 

 Shell rimate or perforate, 

 cylindrical or oblong ; aper- 

 ture rounded, often toothed, 

 margins distant, mostly united 

 by a callous lamina. Type P. 

 uva. 



bigsbyi, Dawson, 1880, Am. 

 Jour. Sci. and Arts, 3d ser., 

 vol. 20, p. 410, Coal Meas. /»« """■ 



vermilionensis, Bradley, 1872, x l,,,H u%a- 

 Am. Jour. Sci., 3d series, vol. 4, p. 87, 

 Coal Meas. 



vetusta, Dawson, 1860, Quar. Jour. Geo. 

 Soc., vol. 16, p. 268, and Acad. Geol., p. 

 383, Coal Meas. 



vetusta var. tenuistriata, Dawson, 1880, 

 Am. Jour. Sei. mid Arts, 3d ser., vol. 

 20, p. 406, Coal Meas. 

 Raphistoma, Hall, 1847, Pal. N. Y.,vol. 1, p. 

 28. [Ety. raphe, seam or suture ; stoma, 

 mouth.] Depressed, often discoid ; spire 

 flat or nearly so ; sutures close ; whorls 

 acute-angular externally and often with 

 an angular edge to the moderate umbili- 

 cus. Type R. striatum. 



acutum, Hall & Whitfield, 1877, U. S. 

 Geo. Expl. 40th parallel, vol. 4, p. 235, 

 Chazy Gr. 



affinit, Foerste, 1885, Bull. Sci. Lab. Deni- 

 son Univ., p. 95. Nol properly defined. 



angulatum, Emmons, 1856, (Straparollus 

 angulatus,) Am. Geol. p 157, Caleifei- 

 ooi < h\ 



apertum, Salter, 1859, Can. Org. Rem., 

 Decade 1, p. 12, Black Riv. and Tren- 

 ton Gr. 



compressura, Whitfield, 188d, Hull. Am. 

 Mus. Nat. Hist., vol. 1, p. 309, P.ir.ls- 

 eye < Jr. 



halli, 6. A. Miller, 1S74, 



> J& nk ! ''I , '" , " , " , " a, ' rt halli,) 



(«flr Cin. Quar. .Four. Sci., 



vIl^ vol. I, p. S18, Hod. 



Riv. Or. 

 labiatum, Emmons, 

 1842, (Maclurea labi- 

 ata,) Geo. Rep. N. Y., p. 312, Caleifer- 

 ous and Birdseye Gr. 

 lapicida, Salter, 1859, Can. Org. Rem., 

 Decade 1, p. 12, Black Riv. and Tren- 

 ton Gr. 

 lenticulare, Emmons, 

 1842, (Pleurotomaria 

 lenticularis,) Geo. 



PlB, 7*7. - UaphU- 



tolllli till 1 1 1. 



Rep. N. Y., p. 392, 

 and Pal. N. Y., vol. 



l, A%* V\- Tr « nt0n FIG. 708.-Ra„hi S - 

 and Hud. Riv. dr. toma lenticulare. 



niagarense, Whitfield, 

 1878, Ann. Rep. Geo. Sur. Wis., p. 82, 

 and Geo. Wis., vol. 4, p. 295, Ni- 

 agara Gr. 



planistria, Hall, 1847, Pal. N. Y., vol. 1, 

 p. 30, Chazy Gr. 



planistria var. parvum, Hall, 1847, Pal. 

 N. Y., vol. 1, p. 30, Chazy Gr. 



