OF SOUTHERN INDIA. 373 



^^-24^.'-'Mod. Aldensis,d'Orh., Mod. Gifreana^V. and Tioux. 

 25. — M^t. Rhodani, P. and Eoux^ appears to be a Lithodomus. 

 ^Q.—Mod. Mortilleti, P. and Roux. 



27-29. — Mi/t. sulfalcatus, d'Orb.; Myt. scapularis, Lam., (=Myt, GaUienneij^ d'Orb., 

 Gueranger, Album paleont. d. 1. Sarthe, 1867, pi. xxii, fig, 1), 3Iyt. engoUmensis, Coq. 



30-31. — Mod, Querangefi and omatunma^ d'Orb., possess tlie strong ornamentation of 

 Bracliydontes, 



32. — Mod. Ligeriensisj d^Orb, 



33. — Myt. peregnnusj d'Orb., is probably a Septifer, (see Gueranger, Album paleont. d. 1. 

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



34-36. — Mod. reversa,f Sow., Mod. mterrupta, d'Orb., Mod. stnatocostata, d^Orb. 

 37. — Myt. clathratus], d'Arch.^ may be a Modiola, but the solidity of the shell strongly recalls 

 a Mytilicardia. 



38-40. — Mod. semiornataj siliquajX and inornata, d''Orb. 

 41. — Modiolaria alternata, d^Orb. 



'42. — Myt. Chauvinianus, d-'Orb. f=M. semistdcatus inVal. fran9.,) is most probably a Crenella. 

 43. — Myt. dilatatuSj d^Orb., would appear to be a young LitJiodomus. 

 44. — Myt. pileopsis, d''Orb., is a Crenella. 



45. — Myt. orbiculattoSj d''Orb., is probably also a Crenella ; it is stated to be allied to the last 

 named species. 



46. — Myt. suhqitadratus, Math. 



47.54. — Mod, JDufrenoyi and divaricata, d^Orb., soluta, Duj., Moidinsii, Marrotimm^ and Bour^ 

 geoisiana, d^Orb., reticulata, Coq., Flmdra, d^Orb. 

 55. — Modiola (BracJiydontes) ornata^ Miinst. 

 56. — Myt. Cottm, Eoem., is probably 2^ Septifer (vide Ryckholt, Mel. Pal., 1^'^ part., 1852, 



p. 147). 



57_59. — Myt. incurvtis, Reuss, strigilatus. and anthrakopJiilus , ZitteL 



60. — Myt. striatissimu&, Reuss., ? a Septifer. 



%l.—Myt. fissicosta, 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. 



52-64. — Myt. grypJioides, 1848,§ inflatus and tegiilatus, Miill., the first and last have the 

 appearance of Septifers. 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. Beimi, d'Orb., a large form allied to, and probably identical with, Por be s' if (?f^. 

 typica. 



^Q. — Mod.' radiata, Miinst. 



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



tamer a, than to any known forms of the Mytilidje. 



68_76. — Mod. fr acta, Reuss, concentrica, Goldf., sphenoides and tetragona, Reuss, typica, 

 Yoxh.y.Oppeli and capitata, Ziiiel, flag ellif era, Porbes, angtistissima, Rss. 



11 .—-Modiola ? omformis, Miill. If the species belongs to this family, it must be referred to 

 Crenella, or to Septifer^ 



* Quoted as M. Gaillenei by Pictpt and Campiche. 



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



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

 § Olim M. scalaris, Miiller, vide Suppl. Monog. Aachner Kreidef.^ pL ii, 1851, p. 68 = Myt. Mulleri, d'Orb., 1850 = 

 Myt, AquisgranensiSi Ryckholt, Mel. paleont., 1852, lei; part., p, 151. 



