Zoological Society. Sfjt 



Earl of Enniskilleu, and Mr. Charles. Of these, brevirostris, crassi- 



rostris and giyanteus are short-nosed species, longirostris and Cuvieri 

 long-nosed. With regard to relative length and proportions of the 

 other parts of the skeleton we have ample means to arrive at tolerably 

 correct conclusions, in consequence of the nearly perfect condition of 

 brevirostrisy crassirostris and longirostris. In the former two we 

 find the cervical vertebraj short and thick, the length being about 

 equal to the height in the latter of the two, while m lonyirostris they 

 vary in length from three to five times their own diameter at the 

 middle. Very uncertain results therefore would arise from finding 

 single bones of this portion of the skeleton, excepting that a long and 

 attenuated cervical vertebra would seem to indicate a corresponding 

 length of snout ; but from the other bones of the animal, moie espe- 

 cially those of the wing, much more satisfactory results may arise. 

 Upon a careful measurement of the casts in the British Museum from 

 the original specimens, I find the following to be the length of the 

 bouies of the wing of P. lonffirostris i-rnx^iujn -tAn -^u) uhxj ^i/i'^wT kj 

 mnrinq iml d) sldndoiq giolaiorf i ai it i nam 



:^A-\\uy. Humerus 1*25 = 8' 55 of length of?w»ig.rJ 



bsTisri- Radius and ulna 1*90 = 5-57 :: yd oJ •«jiX{({B bh/ov/ fi 



.ili99i i Carpus 0-13 = 0'82 ut 8svTiri,ifijjIg ddi isdi 



Metacarpus 1-34 = 7'97 > m ^f,di,9ldjB(fo'fq gi jr 



1st Phalange 1*90 = 5-57 orlj 'to rfllgrwl sdT 



sViUOi .2nd „ 175 = 6*10 '; hi br.^rf gtr 'io dipnoi 



sidhiyi.Srd „ 1-25 = 8'55 .hhr Iryyuf^noo mHon 



isidi ;r<o^lt) . V,^ 1-17 = 9'13 ; ^di ami ,emf jbsr aw 



a90-A?;hff f'/fort^nn 1 ^luviior ^n haod ^di' 



'^if' 10-69 A*»^o .<V 



inches, ■\- i.^j 



^.iS'A'jo- The length of the head 4-25 



glut Df] From the tip of the nose to the commencement - ■■ 



gpaod of the cavitas narium 2*ld'l 8-1f fei 



^.f ir ^ Height of the skull at the commencement of Kpb 9ib 



the cavitas narium O'SS'jIth^iv 



' - ' Length of the femur ;!. .< . . .• l*34'>f'0 



-h'jdiw Length of the tibia f^Mmi v^M^'W^^o ^di 



■'^'^ " '' Smallest diameter of the radius near the distal >> ')djmbpb 



extremity ^d^M adi "^o 



/i By these measurements it is apparent that the tibia, radius and 

 ulna and 1st phalange are equal in length. The humerus and 3rd 

 phalange are also equal to each other, and so likewise are the meta- 

 carpus and femur equal to each other. If we also compare the small- 

 est diameter of the radius, 0*14 inch, with its length, 1*90 inch, we 

 find that the bone is 13-^^ diameters long, and in P. Macronyx {Buck- 

 landi) it is 1 3 3^. We may therefore be enabled, by keeping these 

 comparative measurements in view, to predict with a tolerable degree 

 of certainty the spread of wing of any Pterodactyl of which we may 

 find one or more of the principal bones of the wing, and especially if 



