LEP — PAL. J 



PROTOZOA. 



161 



Leptopterion, Ulrich, 1889, Am. Geol., vol. 3, 

 p. 239. [Ety. leptos, thin ; poterion, cup.] 

 Obconical, annulated free sponge; wall 

 thin, outer surface reticulated. Type 

 L. mammiferum. Not well defined. 

 mammiferum, Ulrich, 1889, Arn. Geol., vol. 

 3, p. 239, Hud. Riv. Gr. 

 Loftusia, Carpenter & Brady, 1869, Trans. 

 Roy. Soc, p. 742. [Ety. proper name.] 

 Small foraminifer, with oval or ellip- 

 tical test, consisting, primarily, of a 

 continuous lamina coiled upon itself, 

 with interspaces divided into chambers. 

 Type L. persica. 

 Columbiana, Dawson, 1879, Quar. Jour. 

 Geo. Soc, vol. 35, p. 74, Coal Meas. 

 Lunulitts? dacty hides, see Cerionites dac- 



tyloides. 

 Lyrodictya, Hall, 1884, 35th Rep. N. Y. 

 St. Mus. Nat. Hist., p. 466. [Ety. lyra, 

 lyre ; dictuon, net.] Cyathiform, reticu- 

 late fronds composed of stellate spic- 

 ules, with broad, -strong, longitudinal 

 bands of acicular spicules, showing an 

 alternating bifurcation. Type L. ro- 

 mingeri. 

 romingeri, Hall, 1884, 35th Rep. N. Y. 

 St. Mus. Nat. Hist,, p. 476, Keokuk Gr. 

 Megastroma, Dawson, 1883, Report on Red- 

 path Mus. No. 2, p. 12. [Ety. megas, 

 great ; stroma, layer.] Somewhat like 

 Stromatopora ; layers consisting of two 

 membranes, beset with spicules, point- 

 ing inwards like two brushes facing each 

 other; membranes porous or reticulate. 

 Type M. laminosum. 

 laminosum, Dawson, 1883, Rep. on Red- 

 path Mus. No. 2, p. 12, Subcarboniferous. 

 Microspongia, Miller & Dyer, 1878, Jour. 

 Cin. Soc. Nat, Hist., vol. 1, p. 37. [Ety. 

 micros, small ; spongia, sponge.] Free, 

 no epitheca; compact, without large 

 openings ; structure radiate. Type M. 

 gregaria _ 



gregaria, Miller & 

 Dyer, 1878, Jour. 

 Cin. Soc. Nat. Hist., 

 vol. 1, p. 37, Hud. 

 Riv. Gr. 

 parva, Ulrich, 1889, 

 (Hindia parva,) 

 Am. Geol., vol. 3, p. 

 244, Trenton Gr. 

 Mosllerina, Ulrich, 1886, Cont, to Am. 

 Pal., p. 34. [Ety. proper name.] Con- 

 sisting of two suborbicular, thin-walled 

 chambers, outer one with spiral ridges, 

 inner one smooth ; at the ends of the 

 outer chamber there is a round open- 

 ing, surrounded by an elevated border, 

 where the ridges terminate. Type M. 

 greenei. 

 greenei, Ulrich, 1886, Cont. Am. Pal., p. 

 35, Up. Held. Gr. 

 Nodosinella, Brady, 1876, Monograph 

 Carb. and Perm. Eoraminifera, p. 102. 

 [Ety. nodus, knot; ellus, diminutive.] 

 Free, straight, or arcuate, not spiral ; 

 constricted at intervals, test imperfo- 



Fig. 108.— Micro- 

 spongia gregaria, 



rate, texture finely arenaceous, aper- 

 ture simple or compound. Type N. 

 digitata. 

 priscilla, Dawson, 1868, 

 - (Dentalina priscilla,) 

 Acadian Geology, p. 

 285, Carboniferous. 

 Nullipora, Lamarck, 1801, 

 S3 steme des Anitu. 

 sans Vert. [Ety. » al- 

 ius, no ; pores, pore.] 

 Not American Palse 

 ozoic. 

 tobtexta, White, 1862, 

 Proc. Bost. Soc. Nat. 

 Hist., vol. 9, p. 33, 

 Burlington Gr. 

 Orbiculites f reticulata, 

 see Receptaculites re- 

 ticulatus. 



Pal.eacis, Edwards & Fig. 109.— Nodo- 

 Haime, I860, Hist. Nat. H *gH5 *$£ m £ d 

 des Coralhaires, vol. 3, enlarged. 

 p. 171. [Ety. palaios, 

 ancient; akis, barb.] Skeleton cuneate 

 or turbinate, adherent, cups 1 to 12, 

 cell-like, margins crenulate, separated 

 by depressions; substance pierced by 

 microscopic tubuli. Type P. cunei- 

 formis. 

 compressus, Meek & Worthen, 1860, 

 (Sphenopterium compressum,) Proc. 

 Acad. Nat. Sci. Phil., p. 448, and Geo. 

 Sur. 111., vol. 2, p. 234, Keokuk Gr. 

 cuneatus, Meek & Worthen, 1860, (Sphe- 

 nopoterium cuneatum,) Proc. Acad. 

 Nat. Sci., p. 448, syn. for P. cuneiformis. 

 cuneiformis, M. Edwards, 

 1860, Hist. Nat. d. Corol- 

 lairs, tome 3, p. 171, War- 

 saw Gr. 

 enormis, Meek, & Worthen, 

 1860, (Sphenopoterium cu ^ a r t i8 . 

 enorme,) Proc. Acad. Nat. 

 Sci., p. 448, and Geo. Sur. 111., vol. 2, 

 p. 146, Kinderhook Gr. 

 enormis, var. depressus, Meek &Worthen, 

 1866, (Sphenopoterium enorme var. de- 

 pressum,) Geo. Sur. 111., vol. 2, p. 146, 

 Kinderhook Gr. 

 obtusus, Meek & Worthen, 1860, (Sphen- 

 opoterium obtusum,) Proc. Acad. Nat. 

 Sci., p. 448, and Geo. Sur. 111., vol. 2, 

 p. 233, Keokuk Gr. 



Pal m oman on, 

 Roemer, 1860, 

 Sil. Fauna 

 West Tenn., 

 p. 12. [Ety. 

 palaios, an- 

 cient ; Manon, 

 a genus of 

 sponges.] Cy- 

 lindrical or ir- 

 regular, cup- 

 shaped, free, 

 upper surface 

 displaying 

 large, dispersed openings, with inter- 



FlG. 110. 



Fig. 111.— Palseomanon 

 cratera. 



