17 
Earl of Enniskillen, and Mr. Charles. Of these, brevirostris, crassi- 
rostris and giganteus 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 
brevirostris, crassirostris and longirostris. In the former two we 
find the cervical vertebree short and thick, the length being about 
equal to the height in the latter of the two, while in longirostris 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 along and 
attenuated cervical vertebra would seem to indicate a corresponding 
length of snout ; but from the other bones of the animal, more 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 
bones of the wing of P. longirostris :— 
inch 
Humerus .......... 1°25 = 8°55 of length of wing. 
Radius and ulna... .. 190K ==95 57 Pf . 
* Carpas oi ee oh fs oes SOrep 3 
Metacarpus ........ 1:34 = 7:97 » 
Ist Phalange ....... 1:90 = 5°57 ” 
BH TRUE ) 199 18 1°75 = 6:10 re 
3rd Ha Ato eee 1:25 = 8:55 Be 
4th PA ee OR DAS Os “3 
10°69 
inches. 
The length: af theshéad» o)506 0.0, yes he.s) 45 
From the tip of the nose to the commencement 
of the cavitas narium................... 2°10 
Height of the skull at the commencement of 
the cavitagmeanain. . posses yr eiey- 0°38 
Length ofthe femir.) 494) .)600 Pod euad. 784 
Lepeth ofthe tiie ets. dQ 2/9. e228. | 1990 
Smallest diameter of the radius near the distal 
extrematy.) Pmidh ok Sek, J tips eae 0°14 
By these measurements it is apparent that the tibia, radius and 
ulna and Ist 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 13,8; diameters long, and in P. Macronyzx (Buck- 
landi) it is 13. 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 
No. CCXX.—Procrepin¢s or tHE Zooocicar Socrery. 
