232 Mr. F. M'Coy on the Fossil Botany and Zoology 



the coarse conglomerate of Korinda, N. S. Wales, and in the gray 

 schists of Le win's Brook, N. S. Wales. 



Atrypa Jukesii (M'Coy). PI. XIII. fig. 8. 

 Sp> Char. Transversely oval, length two-thirds the width ; sides 

 with eight or nine large, acutely angular, simple plaits, ex- 

 tending from the beak to the margin, which they deeply in- 

 dent ; mesial elevation moderate, square, of five slightly angular 

 simple plaits, much smaller than those of the sides. 



This species is closely allied to the A. pleurodon (Phil.) of the 

 carb. limestone of Britain, and the A. fallax (Sow.) of the upper 

 Devonian and lower carboniferous shales of England and Ireland, 

 but is distinguished by the dissimilarity in size and angulation 

 between the mesial and lateral plaits ; the mesial plaits are if 

 anything a little larger than those of the sides in the British 

 forms alluded to. Length 4£ lines, width 7 lines. 



Common in the Dunvegan shale. 



I have dedicated this species to my friend Mr. Jukes, who has 

 geologically examined a considerable portion of the country and 

 collected many fossils, which I have not as yet seen. 



Spirifera (Reticularia) crebristria (Mor.). 



This species has got a distinct cardinal area, and could not 

 therefore belong either to Terebratula or Athyris as suggested by 

 Mr. Morris ; it is in fact a typical example of that little group of 

 Spirifers for which I have suggested the name Reticularia in the 

 1 Synop. Carb. Foss/ &c, distinguished by their small size, area 

 and hinge-line as in Martinia (M'Coy), (that is, the former 

 shorter than the width, and the latter moderately large,) in ad- 

 dition to a reticulated surface and parallel dental lamella. Is 

 this really distinct from the Spirifera (Ret.) microgemma (Phil.) 

 of the Devonian and lower Irish carboniferous shales ? On com- 

 parison I scarcely think it is. 



Bather rare in the schists of Dunvegan, and in the fine sand- 

 stone forming the summit of a hill one mile south of Trevallyn, 

 N. S. Wales. 



Spirifera vespertilio (Sow.). 



Not uncommon in the impure limestone of Black Head, N. S. 

 Wales, and abundant in the dark calcareous schists of Eagle 

 Hawk's-neck, Van Diemen's Land. 



Spirifera calcarata (Sow.). 

 I cannot in the slightest particular distinguish examples from 

 the sandy shales of Dunvegan, N. S. Wales, from those so abun- 

 dant in Devonshire and in the lower carboniferous shales and 

 sandstones of Ireland. 



