270 Proceedings of the Boyal Physical Society. 



of which we at present have only one specimen. It is quite 

 decorticated, much smaller than the preceding, with a deep 

 well pronounced sulcus in the ventral valve extending well 

 up into the beak, and bounded by strong ridge-like margins. 

 In the dorsal valve there is a corresponding medial fold 

 although not relatively so prominent as the sulcus. The 

 hinge line was less in length than the width of the shell. 

 It appears to resemble some of the Spirifera glabra group, 

 but the loss of the shelly matter renders identification diffi- 

 cult, especially as we have only one specimen. A close 

 resemblance exists between Spirifer euryglossus (Schnur), and 

 the present species. 



Zoc. and Horizon. — Fanning Eiver Limestone. 



Collector. — E. L. Jack, Esq. 



Genus Atrypa — Palman, 1828. 



(Kongl. Vet. Acad. Handl. for ar 1827, p. 102.) 



Atrypa reticularis — Linnaeus. — PL YIL, fig. 2. 



Aiiomia reticularis, Linn., Syst. Nat., 1776, 12th Ed., i., pt. 2, p. 1152, 

 Atrypa ,, Davidson, Mon. Brit. Dev. Brachiopoda, 1864, p. 53, 



t. 10, f. 3 and 4. 



Ohs. — One very well marked example of this cosmopolitan 

 species has been forwarded by Mr Jack, and it affords me 

 much satisfaction to be able to introduce it from Queensland 

 rocks of Devonian age. The ventral valve is much better 

 preserved than the dorsal, and although the characteristic 

 decussating frills or laminae are preserved on both, they are 

 seen to much greater advantage on the ventral. 



Loc. and Horizon. — Limestone of the Fanning Eiver. 



Collector. — E. L. Jack, Esq. 



Atrypa desquamata — J. de. C. Sowerby. — PI. VII., figs. 3, 4. 



Atrypa desquamata, J. de. C. Sow., Trans. Geol. Soc, 1840, 2d. ser. v., Expl. 

 of t. 56— t. 56, f. 19, 20. 

 „ ,, Davidson, Mon. Brit. Dev. Brach., 1864, p. 58, t. 10, 



f. 9-13, t. 11, f. 1-9 {for synono7ny). 



Ohs. — From the series of figures of Atrypa desquamata 

 given by Mr Davidson, it is quite clear that the species is 

 one of considerable variation, both in the relative dimensions 



