231 CRETACEOUS PELECYPODA 



38. — M. aubtriquetra,'Si'6mev, from Texas may, as far as tlie fragmentary valve figured by 

 Rijmer is coueeriied, belong' to either Monopleura or Requieiiia, but until more is known of the 

 species Romer's original determination may best Ije retained. 



39-43.— C'//a»za iriedra and gracUicorms, Pict. and Camp., Ch. cretacea, curnucopm, and 

 angulosa, d'Orb. 



44,.48. — Ch. spondyloides, Bayle, costata and senii-plana, KiJiner, Murilzi, Stromb., mjjra- 



cretaeea, d'Orb. 



49. — Ch. siib-orbiculdia, d'Orb., is a doubtful species. 



50. — Ch. Aliinsteri was described by Hagenow as Exogym, and is doubtfully placed in this 

 genus by Bosquet, though it probably belongs to it. 



51.52. — Ch. Haneri and detrita are described from the Gosau by Zittel (Denksch. Akad., Wien, 

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



!J3-lJi.— Capiina adversa and AquiUu7ii, d'Orb. Zittel (Denksch. Akad., Wien, xxv, pt. ii, 

 p. 154,) unites, I think very properly, d'Orbigtiy's C. Coquandiana and Reuss's C. exogyra with 

 C. Aquilloni. 



55. — C. laminea, Gein. 



Caprina ? rotiindala, Schafbautl, (Bayercs Leth. Geog., p. 377,) is based upon an Exogyra- 

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



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

 I'Etage Aptien de I'Espagne, p. 150, &c. 



58. — C. Maiheroni, Coq., is from Algiers. 



59-63. — C. crassiji/jra and Ctuideloujue of Romer, and C. occidentalis, planata, and quadrata 

 of Conrad, are noted from North America. 



64-67. — Caprotina quadriparlita, costata, striata, semistriata, and Cenomanensls are described 

 by d'Orbigny. 



68. — Caprotina costidlaha, Miiller, Suppl. Mon. Petref. Aachen Kreidef., p. 10. Bosquet 

 places it with a querj' in Chaiiia, (see Staring' s Bodem van Nedeiland, ii deel). 



69. — Cap. Lazyckowii, Eichw., Leth. ross., livr. x, p. 3;)9. The figure appears to represent 

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

 shell would not seem to differ generically from Ckama. 



70. — C. caiicasica, Eieliw., 1. cit., p. 360. 



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

 manensis, 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. — Biplidia unisulcata, ]\Iath. 



74-77. — Caprinula Boissyi, d'Orl)., Caprinula breris and d'Orbignyi, Sharpe, Caprinula 

 Neapolitana, Meuegliini. 



78-80. — Caprindla Doublieri, d'Orb., C. triangularis, Desm., sp., C. depressa, d'Arch. 

 81-84. — C. coraloides, Hall and Meek, cornuta, loricata, and quadrangularis of Tuomey are 

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



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

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

 with that of Caprotina Cenomantusis, d'Orb. 



