154 A. H. Foord — Western Australian Fossils. 



(Morris). The characteristic features of this species are fairly well 

 shown in two or three examples. 



Locality. — Irwin River, Victoria District. 



Oethotetes crenistria, Phillips, sp. 



1836. Spirifera crenistria, Phillips, Geology of Yorkshire, pt. ii. p. 216, pi. xi. fig. 6. 

 1860. Streptorhynehus crenistria, Davidson, Brit. Carb. Braeh. vol. ii. pt. v. third 



portion, p. 124, pi. xxvi. fig. 1, pi. xxvii. fig. 1-5 and 10 ?, pi. xxx. figs. 



14-16. 

 1865. . Streptorhynehus crenistria ? Beyrich, Physik. Abhandl. der Konigl. Akad. der 



Wissensch. zu Berlin (1864), p. 82, Taf. 1, figs. 9, a, b. 



1877. Orthotetes cienistria, de Koninck, Recherches sur les Fossiles Paleozoiques de 



la Nouvelles-Galles du Sud (Australie), pt. iii. p. 212, pi. x. fig. 8. 



1878. Orthotetes crenistria, Etheridge, jun., Cat. Australian Fossils, p. 50. 



This species is represented only by a fragment of a dorsal valve. 

 Locality. — Irwin River, Victoria District. 



LAMELLIBRANCHIA TA. 



Pachydomus carinatus, Morris. 



1845. Pachydomns carinatus, Morris, in Strzelecki's Physical Description of New 

 South Wales and Van Diemen's Land, p. 273, pi. xi. figs. 3, 4. 



1847. Cypricardia rugulosa, Dana, American Journ. Sci. vol. iv. p. 157. 



1847. Pachydomus carinatus, M'Coy, Ann. Mag. Nat. Hist. vol. xx. p. 301. 

 „ Mceonia carinata, Dana, in Wilkes's Expl. Exped. 1838-42, vol. x. Geology, 

 p. 696, Atlas, pi. vi. figs, la, lb. 



1877. Pleurophorus carinatus ?, de Koninck, Rech. sur. les Foss. Paleoz. de la 



Nouvelles-Galles du Sud, pt. iii. p. 283, pi. xix. fig. 8. 



1878. Pachydomus carinatus, Etheridge, jun., Cat. Australian Fossils, p. 74. 

 1880. Pachydomus (?) carinatus, Etheridge, jun., Proc. Royal Phys. Soc. Edinburgh, 



p. 300, pi. xvi. fig. 53. 



The strong umbonal ridge makes this species easily recognizable. 

 There are two or three small examples of it. 

 Locality. — Irwin River, Victoria District. 



Undetermined Species. 



The following genera also are probably represented among the 

 Irwin River fossils, but the specimens are too imperfect for specific 

 identification : — Aviculopecten, Modiola, Edmondia, Sanguinolites. 



GASTEROPODA. 

 Bellerophon decussatus ?, Fleming. 



1828. BeUerophon decussatus, Fleming, British Animals, p. 328. 

 1844. Bellerophon decussatus, de Koninck, Descrip. des Animaux Foss. du Terr. 

 Carb. de la Belgique, p. 339, pi. xxix. figs. 2, 3, pi. xxx. fig. 3. 



1877. Bellerophon decussatus, de Koninck, Reck, sur les Foss. Paleoz. de la 



Nouvelles-Galles du Sud (Australie), pt. iii. p. 366. 



1878. Bellerophon decussatus, Etheridge, jun., Cat. Australian Fossils, p. 79. 



There are several examples, mostly of the young, of a shell very 

 much like Fleming's species, but only one of them has the test 

 remaining, and in this the ornaments are not quite satisfactorily 

 preserved. 



Locality. — Irwin River, Victoria District. 



