134 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. 



8. Mtophoeia ornata, Miinster. PI. XII, Figs. 12, 13, 14. 



Myophoria ornata, Miinster: Beitr. Petref.-Kmide siidostlichen Tirol., 



1841, p. 88, pi. viii, fig. 21. 

 Cardita elegans, Klipstein: Beitr. geol. Kennt. ostlichen Alpen, 1843, 



p. 255, pi. xvi, fig. 21. 

 Myophoria ornata, Bittner : Lamellibrancli. Alpiuen Trias, 1895, p. 93, 



pi. xii, figs. 20-22. 



Some of the wax impressions yield fairly good fragmentary 

 examples of Myophoria ornata. These exhibit a series of rather 

 curved radial costse, ornamented with closely set and strong transverse 

 ridges, the longitudinal grooves being more finely striated in a similar 

 direction. The species is of more or less elongate form, although no 

 perfect examples are present. 



Distribution. — Found in the St. Cassian Beds (Upper Trias) of the 

 Tyrol, etc. 



9. Myophoria in^quicostata, Klipstein. PI. XII, Figs. 9, 10. 



Myophoria ? inmquicostata, Klipstein : Beitr. geol. Kennt. ostlichen 



Alpen, 1843, p. 254, pi. xvi, fig. 18. 

 Myophoria Whateleycs, Buch : F. 11. von Hauer, Sitzber. math.-nat. 



CI. k. Akad. Wissensch. Wien., Bd. xxiv (1857), p. 554, 



pi. v, figs. 8-10, non figs. 4-7. {Non Yon Buch.) 

 Myophoria ineequicostata, Alberti : Ueberblick iiber die Trias, 1864, 



p. 114, pi. ii, fig. 5. Bittner: Abhandl. k.k. geol. 



Keichs., Bd. xviii (1895), pt. 1, p. 94, pi. xi, figs. 1-14. 



This form is related to M. ornata, but has costse of unequal size, 

 with frequently a smaller rib intervening between the larger ones. 

 The sculpture, however, is very similar in the two species. The 

 principal ribs are rounded, elevated, and covered with closely set 

 annulations, the intermediate rib being finely beaded. 



Distribution. — Upper Trias of St. Cassian, Raibl, etc. 



10. Myophoria Malay'ensis, n.sp. PL XII, Fig. 15. 



Some wax impressions of casts of this genus exhibit a form 

 showing rather thin and elevated radial costae, with an occasional 

 intermediate smaller one, but apparently smooth and without orna- 

 mentation such as occurs in the other species referred to. Its 

 affinities are unknown to the author, and it is probably a new species, 

 for which the name of M. Malayensis may be proposed. Another 

 smooth form, related to this species, is represented in Fig. 11. 



Dimensions. — Height 15, length 13 mm. 



11. Myophoria, sp. PI. XII, Fig. 16. 



One specimen, represented by a cast, may belong to one of the 

 foregoing species. It has about six prominent ribs, separated by 



