444 CRETACEOUS PELECYPODA 



23. — PI. Malben-kiiina, Coq., (Bull. Soc. Geo!., France, xvi, 1859, p. 1003). 

 24.30. — PI. Fuiirneti, Ferryi, Flattersi, Auressensis, Rej/nesi, Desjardinsi and decipiens are des- 

 cribed by Coquand from Algiers, (Geol. et Paleont. Prov. Constant., 1S62, p. 220 et seq.). 



31. — P. ur/icosa, Mort., (Synops. cret. foss.. North America, p. 62, pi. 10, fig. 2). 

 32. — P. incoiiffrita, Con., (Emory^s Rep., p. 153, pi. 6, fig. 10). 



33.34._P. Siiffordi et teirica, Con., (Journ. Acad. Nat. Sc, Phil, 2ud ser., iv, p. 283, pi. 46, 

 figs. 34 and 26). 



35.— P. variata, Gabb, (Pal. Calif., i, p. 303, pi. 26, fig. 19U). 



36-40. — PL striutocosiata, instabUis, muUicostata, sess'dis and seplcmcodata occm' in the South 

 Indian cretaceous deposits. 



Sj)ond!/lus (see Pictet' Pal. Suisse, V"" ser., 4'»« part., p. 260). 



41-50. — Sp. Rmmeri, Desh., ( = lalits, Desh. et hifstri.v apud Roemer), striatocostatus,*' 

 d'Orb., hellulus, Lor., camellatus, Guem., complanatus, d'Orb., (jlhhosus, d^Orb., Renauj'iatius, 

 d'Orb., dicJiofomus, Buv., s1riatus,-\ Sow., Requieniamis,^ Matheron. 



51-60. — Sji. hi/sfrix, Goldf., lattis, Sow., fimhriaim, Dixon, obesus, d'Orb., Coqwatidianus , 

 hippuritarum, and alternatus, d'Orb,, spijiosiis, Sow., tnmcatus, Goldf., Carentonensis, d'Orb. 



61-70. — Sp. Santonensis, globulosiis, Roi/anus et Dntempileaims,% d'Orb., aqualis, Heb., Aonis^ 

 d'Orb., obliquus, Mant., BrigJiioniensis, Mant., lineatus, Goldf., undulatus, Rss. 



71-75. — Sp. Hci/enovi ai\i a-yjer, Miinst., armatus, Goldf., subpUcafits and siMcevis, d'Orb. 



76. — Sp. piilviiiatus, Zittel (Denksch. Akad., Wien, xxv, pt. ii, p. 119), is from the Austrian 

 Gosau deposits. 



77-78. — Sp. tauricus eipj/f/maus, Eichw., (Leth. rossic, xmelivr., 1867, p. 419 et seq.). 



79. — Sp. Baylei, Coq., from Algiers, (Geol. and Pal. Prov. Constant., 1862, p. 220). 



80-82. — Spondjjlus echinaius, Mort., (= Sp. capax, Con.), ijregalis, Mort., et Guadaloupce, 

 Roem., (see Meek in Check-list, North Am. inv. foss., Smith. Misc. Coll., No. 177, p. 7). 



83-86. — Sp. Arrialoorensis, sulcatellus, calcaratus, and subcostellatus occur in the South Indian 

 cretaceous deposits. 



PLICATULA, Lamarck, 1801, (see p. 440). 



* 1. Plicatula striatocostatAj StoUczka, PL XXXIV, Eig. 20. 



PI. testa ovata, ap)ice ungustata et suh-truncata, complanata, valvis mib-cequalibics, 

 sinistra paululiim majore, ad timhonem angnstissime affixa, utraque hremter 

 auriculata, superjicie costiilis radiantibus tenuibus, paulo undulatis, 7-8 fortioribiis 

 ad intervalla interpositis, acute tuberculatis vel spinulosis ornata. 



A small species with flattened, sub-equal valves, both of which are provided 

 Avith small ears, the beaks are depressed and truncate ; the surface is marked with 

 a number of thin radiating ribs, between which there are at short intervals stronger, 



* Fraas notes a fragmentarj' specimen from Pala-stiue, possibly belonging to this species (Wiirtb. Jaki-eshefte, 

 xxiii, 1867, p. 232). 



t Sec Zittel in Denksch, Akad., Wien, xxv, pt. ii, p. 118. 

 X See Favre, Descrip. foss. Moll, de Lemberg, 1809, p. lot). 



