234 CEETACEOUS PELECYPODA 



38. — M. suUriquetra, Ptomer, from Texas may, as far as the fragmenfaiy valve figured by 

 Boomer is concerned, belong" to either Monopleura or Reqiiiema^ but until more is known of the 

 species Homer's original determination may best be retained. 



39-43. — Chama triedra and graciliconiis, Pict. and Camp., Ch. cretacea, cornuco2:)ice, and 

 angulosa, d'Orb. 



A^i^-^^.—CJi. sponcl^loldes,^2iy\Q, costaia and semi-jAava, Romer, Moritzi, Stromb., supra^ 

 cretacea, d'Orb. 



49. — Cli. suh-orhiculata, d'Orb., is a doubtful species. 



50.— C7^. 7¥^'?2^^m was described by Hagenow as Exogyra, and is doubtfully placed in this 

 genus by Bosquet, though it probably belongs to it. 



51-52. — Ch, Raueri and detrita are described from the Gosau by Zittel (Denksch. Akad., Wien, 

 vol. xxiv, pt. ii, p. 147). ^ 



h^-h^.— Caprina adversa and Aquillcmi, d'Orb. Zittel (Denksch. Akad., Wien, xxv, pt. ii, 

 p. 154,) unites, I thmk very properly, d'Orbigny's C. Coquandiana and Keuss's C. exogyra with 

 C. Aquilloni. 



55. — C. lawinea, Gein. 



Caprina ? rotundata, Schafhseutl, (Bayerns Leth. Geog., p. 377,) is based upon an Exogyra- 

 like fragment of a shell, thoroughly insufhcient for specific or even generic determination. 



56-57. — C. Baylei and Verneidlli (Bayle) are described by Coquand in his Monog. de 

 PEtage Aptien de PEspagne, p. 156, &c. 



58. — G. Matheroni, Coq., is from Algiers. 



59-63.— a crassifibra and Cuadeloupm of Romer, and C. occidentalis, planata, and qnadrata 

 of Conrad, are noted from North America. 



^^^•m .—Caprotina quadripartita, coskUa, striata, semistriatt, and Cenomane^isls are described 

 by d'^Orbigny. 



QS.—Caprotina costuUata, Miiller, Siippl. Mon. Petref. Aachen Kreidef., p. 16. Bosquet 

 places it with a query in Chama, (see Staring' s Bodem van Nederland, ii deel). 



69.-6%?. Lazyckowii, Eichw., Leth. ross., hvr. x, p. 359. The figure appears to represent 

 a lower valve (1. cit., pi. 18, fig. 32), showing only a single pit below the beak, and in that case the 

 shell would not seem to differ generically from Chama, 



70. — C, caucasica, Eichw., 1. cit., p. 360. 



71.— a russiensis, d'Orb., Eichw., 1. cit., p. 360; the upper valve resembles that of C. Ceno- 

 rmnemis, but the lower is conical, more like that of a Monopleura than of a Caprotina. 



72. — Caprotina <' Senseni, Con., sp., is from North America. 



73. — Diplidia unisulcata, Math. 



l^-n.—Caprimda Boissyi, d'Orb., Caprinula hrevis and d'OrUgnyi, Sharpe, Caprinula 

 Neapolitana, Meneghini. 



IS-^^.—Caprinella BouUieri, d'Orb., C. triangularis, Desm., sp., C. depressa, d'Arch. 

 81-84.-— a coraloides,lli^\\ and Meek, cornuta, loricata, ^x\di quadrangularis o^ 'Ixxomaj are 

 noted in Meek's Check-list of North American cretaceous fossils under the name of Ichtyosarcolithus. 



85.— In the South Indian cretaceous rocks the present family has as yet only been found 

 represented by two species, Chama deplanata, n. sp., and a single upper valve ai3pears to be identical 

 with that of Caprotina Cenomantnsls, d^Orb. 



