OF SOUTHERN INDIA. 373 



2,B-24!.— Mod. Aldensii,(l.' Orh., Mod. G/ffi-eaiia,^. and Uoux. 

 25. — Mj/L Rhodani, P. and Roux, appears to be a Lithodomus. 

 %^.—Mod. MoHilleti, P. and Roux. 



27-29.— J/y^;. sulfalcahis, d'Orb.; Mi/t. sccqmlaris, Lam., (=^M>jt. GalUennei* d'Orb., 

 Gueranger, Album paleont. d. 1. Sarthe, 1867, pi. sxii, fig. 1), Mijt. engoUmensis, Coq. 



30-31. — 3Iod. Guerangeri aud oniatissima, d'Orb., possess the strong ornamentation of 

 BracJiy denies. 



32. — 3Iod. Liger'iensis, d'Orb. 



33.— i/ij/C. peregrinus, d'Orb., is probably a Sepilfer, (see Guerauger, Album paleont. d. 1. 

 Sarthe, 1867, pi. xxiii, fig. 7). 



3-1-36. — Mod. reversa,f Sow., Mod. internqda, d'Orb., Mod. striatocostata, d'Orb. 

 37. — 3Ij/t. claihratus, d'Arch., may be a Modiola, but the solidity of the shell strongly recalls 

 a Mytllicardia. 



38-40. — Mod. semiornata, siliqiia,% and inm-nata, d'Orb. 

 41. — Modiolaria alternata, d'Orb. 



^l.—Myt. CJuiuvinianns, d'Orb. ( ^= M. semisitlcatus in Pal. fran?.,) is most probably a Creiiella. 

 43. — M^t. dilatafns, d'Orb., would appear to be a young Lithodvmus. 

 44. — Mi/t. pileopsis, d'Orb., is a Crenella. 



A:^.—Myt. orbiculatus, d'Orb., is probably also a Crenella ; it is stated to be allied to the last 

 named species. 



46. — Mi/t. suhquadratus, Math. 



47-54. — Mod. Bufrenoyi and dwaricata, d'Orb., soliita, Duj., Moulinsii, Marrotiaua, and Bmtr- 

 geoisiana, d'Orb., reticulata, Coq., Phadra, d'Orb. 

 55. — Modiola (Brachgdontes) ornata, Miiust. 



56. — Mgt. CotteBy Roem., is probably a Septlfer (vide Ryckholt, Mel. Pal., l''<= part., 1852, 

 p. 147). 



57-59. — Myt. hicurvus, Reuss, strigilatiis and anthrakophilus , Zittel. 

 60. — Myt, striatissimus, Reuss., ? a Septifer. 



61. — Myt. Jissicosta, Reuss, sp., is based upon an imperfect specimen. If only the beak is 

 broken off, as shown in the figure, the shell must be compared with Crenella, but the enlarged figure 

 (7b, given by Zittel 1. cit. on pi. xii) is not an exact representation of that drawn in natural size. 



62-64. — Myt. gryphoides, 1848,§ ivjlatus and tegulatus, Miill., the first and last have the 

 .appearance of Sepiifers. Bosquet considers the second named species to be a Modiola, and 

 Ryckholt (Mel paleont., 1" part., 1852, p. 151,) quotes it as a synonym of M. pileopsis, d'Orb., 

 which determination is not improbable, for both belong to Crenella. 



65. — Mod. Reussi, d'Orb., a large form allied to, and probably identical with, Forbes' ifod?. 

 typica. 



66. — Mod. radiata, Miinst. 



67. — Myt. arcacem, Gein. This species shows much more affinities to Mytilicardia or Cardi- 

 tamera, than to any known forms of the Mytilid^e. 



68-76. — Mod. fracta, Reuss, concentrica, Goldf., sp/ieiioides and teiragona, Reuss, typica, 

 Forb., Oppeli and cajntata, 7i\i\i%\, flag ellif era, Forbes, angustissima, Rss. 



77. — Modiola ? oviformis, Miill. If the species belongs to this family, it must be referred to 

 Crenella, or to Septifer. 



* Quoted as M. Oaillenei hj Pictet and Campiche. 



t Mem. Cour. Acad. Belgique, xxxiv, 1870; Briart et Cornet, Foss. de Bracquegnies, p. 53. 



J Also recorded by Zittel from the Gosau formation in the Austrian Alps ; non Modiola siliqua, Phil., a recent species. 

 § Olim 3f. »cateW«, Miiller, wide Suppl. Monog. Aachner Kreidef., pi. ii, 1851, p. 6S = Mi/t. Mulleri, d'Orb., 1850 = 

 Mi/t, Aquisgranensis, Ryckholt, Mel. paleont., 1852, ler part., p, 151. 



