1861.] DAVIDSON BRACniOPODA, SALT-RANGE. 29 



cluster into fasciculi, seven or eight being collected into groups, which 

 give to the valves the appearance of a double plication, many of the 

 smaller nbs being due to interpolation ; wliile the whole surface and 

 ribs are closely intersected by numerous sliarp, projecting, concentric, 

 undulating laminae, of which four or more may be counted in the 

 breadth of a line. Dimensions very variable : a large example 

 measured 26 lines in length by 39 in width and IS or 19 in depth. 

 It was not until after much hesitation that I have ventured to 

 propose a new name for the S^nrifera under description. In external 

 shape as well as by the grouping of its ribs, it bears much resemblance 

 to several known species of Spirifera, and especially to that ligiu'ed 

 in Owen's * Geological Survey of AVisconsin and Minnesota ' (pi. 5. 

 iig. 4) under the name of Si^'wifer fasciger, Kej'serling ? ; but I 

 partake of that author's doubts Avhile referring the shell in ques- 

 tion to De Keyserling's Russian species. It approaches also by its 

 shape to certain examples of D'Orbigny's Sj). Condor, Sjp. cameratus, 

 Hall, as well as to some exceptional British specimens of Sjpirifem 

 striata ; but in none of these do we perceive, nor does any author 

 describe, the peculiar and beautifully regular, closely disposed, sharp, 

 projecting, concentric, undulating laminne, which resemble so closely 

 those otSj). lamhiosa, and which give to the shell its beautiful sculp- 

 tured appearance. ;S/;. MoosaJchailensis is common in the Punjab, 

 at Moosakhail, Chederoo, Kafir Kote, &c. 



10. Spirifera LiNEATA, Martin, sp., var. PI. II. fig. 3. 



Martin's shell varies considerably in shape, but has nowhere, to 

 my knowledge, attained the large proportions of certain Punjab spe- 

 cimens ; and indeed I was for some time uncertain whetlier these 

 last did really belong to our well-known European species ; but, after 

 the attentive examination of some smaller Indian examples, I found 

 these last to be undistinguishable from many specimens of Martin's 

 type. Tlie peculiar arrangement of spinules, so well displayed in 

 some Scottish examples of S^y. lineata, could also be observed hero 

 and there upon the Punjab silicified specimens. The largest Indian 

 example I have seen measured 3 inches 2 lines in length, by 3^ in 

 width and 1 inch 7 lines in depth. Another, identical with one 

 from Derbyshire, measured in length 22, and in width 23 lines. It 

 occurs at Chederoo and Moosakhail. This is the shell which in 

 1853 M. De Yerneuil and myself considered to be nearly related to 

 Sp. lineata. 



11. Spiriferina octoplicata, Sow., sp. PI. I. figs. 12, 13. 



The Moosakhail specimens exactly resemble our British Carboni- 

 ferous examples ; they show the same variations in shape and num- 

 ber of ribs. 



12. PtHYNCnONELLA PLErRODOX, PllillipS, Sp. 



One or two examples, which appear to agree with our British 

 type, have been found by Dr. Fleming at Moosakhail. 



