478 CRETACEOUS PELECYPODA 



11. DiploscUza, Conrad, 1866, (Am. Journ. Conch., II, p. 77). Sub-ovate, 

 incquivalve ; smaller valve concave, both of a laminated structure and with trun- 

 cate, deeply-notched or emargiuated beaks. Type, D. cretacea, Con. (1. cit., p. 77, 

 pi. 9, figs. 2-3). 



Conrad says that " the shell seems to have been attached by the umbo of 

 the larser valve, the truncature of which reminds us of the truncated beak of 

 Terebratula." It is a curious shell, and, if perfect, would indicate a greater simi- 

 larity to a Brachyopod form than any I am acquainted with. 



List of Cretaceous species. 



1. — Atiomia Neocomiensis , d'Orb., Pal. Franp, terr. cret., iii, p. 754-, pi. 489, figs. 1 — 3. 



2. — A. Imigata, Sow., (Trans., Geol. Soc, Lond., iv, pi. 14, fig. 6,) from the lower Green- 

 sand and Neocomien. 



3.— J. cosiulata, Rcem., (Nordd. Oolit., Nachtrag, 1839, p. 24, pi. 18, fig. 5,) from the Hills. 



4. — A. eonvexa, Sow., (Trans., Geol. Soc, Lond., iv, pi. 14, fig. 7,) from lower Greensand. 



5. — A. pseudo-radiata, d'Orb., Prod, ii, p. 84, ^=radiaia, Sow., (non Risso), Trans., Geol. 

 Soe.j Lond., iv, pi. 14, fig. 5. 



6. — A. pa]}yracea, d'Orb., Pal. frang, terr. cret., iii, p. 755, pi. 489, figs. 7 — 10. 



7. — A. sub-tmncata, d'Orb., (Prod, ii, p. 171, = A. truHcata, Geinitz, (non Linne,) Charac- 

 teristic Saechs. Kreid., pt. iii, 1842, p. 87, pi. 19, figs. 4-5,) from Bohemia. 



8. — A. semiglohosa, Geinitz, (Quadersandst., 1850, pi. xi, figs. 6 — 9), from Kieslingswalda. 



9. — A. lamellom, Rcem., (Nordd. Kreidef., p. 49, pi. 8, fig. 3). 



10. — A. fframtlosa, Rcjm., (ibid., pi. 8, fig. 4), from Riigen. Only the convex valve of this 

 species is known ; the hinge margin is said to be thickened, with 3-4 vertical, conic, prominences. 

 This would indicate that the species in question rather belongs to the Spondylidje than to the 

 Anomud^. 



11-12. — A. siibradiaia et excissa, Reuss, (Boehm. Kreidef., pt. ii, p. 45, pi. 31, figs. 15, 18,19). 



13-14. — A. pellucida and verrucifera, Miiller, (Monog. Petref. Aachener Kreidef., Sujipl., 

 1859, p. 7, pi. vii, figs. 4-5). 



15. — Flacunopsis? ciliata (^ Orbicula ciliata, Miiller), Bosquet in S tarings Bodem van 

 Nederhmd, IF" deel, fossil fauna, &e.. No. 526). 



16. — A/iomia refidrjens, Coq., Mon. Etage Aptien de T Espagne, 1865, p. 169, i^l. 27, figs. 8-9. 



17. — A. forata, Passy, (Gryphaa forata, Seine- inf., pi. 14, figs. 5-6, Coquand, Mon. dii 

 genre Ostrea cret., 1869, p. 194). 



18-19. — A. Coquaiidi et intercostata, Zittel, (Denksch. Akad., Wien, xxv, pt. ii, pp. 126 

 and 127, pi. 19, figs. 8 and 10,) from the Gosau. 



20. — A. excenlrica, Coq., (Bull. Soc. Geol. de France, 2nd ser., vol. svi, p. 1068). 



21-22. — A. epliippiiformis .and distracia, Eichw., are stated to occur near Khoroschowo in beds 

 believed to be by Eichwald Neocomien, (Leth. ross., xme livr., 1867, p. 411). 



23. — Cyclostreon pUcatnloides, Leym., (Eichwald, Ibidem, p. 407), see p. 475. 



24,. — fCi/clostreon'?) PUcatula arachnoidea, Deslongch., (Mem. Soc, Linn., xi, 1860, p. 124, 

 pi. 18, figs. 38, 39), a very remarkable species, but it is not clear whether the name Cyclostreon is 

 applicable to it. 



I'a.—Anomia parva, Gabb, (Proc. Acad. Nat. Sc, Phil., 1860, p. 198, pi. 3, fig. 5,) from Chili. 

 26-34. — Paranomia lineata, Conr., Saffordi, Conr., et scabra, Morton, Anomia argentaria, 

 Mort., Flemingi, Meek, obliqua, M. and Hayd., sellaformis, Conr., snbtrigonalis, M. and Hayd., 

 et telliiioides, Mort., are from North America (vide Meek in Smiths. Misc. Coll., No. 177, p. 6). 



