608 PHILOSOPHICAL TRANSACTIONS. [aNNO 1743. 



animals in Africa, having 2 horns on the nose. Peter Kolbe, a Dutchman, in 

 his voyage to the Cape of Good Hope, says, there is one on the summit of the 

 nose, like the others, but having a smaller close behind it. There are also 1 

 horns in Sir Hans Sloane's Museum, sticking to the same individual integuments, 

 not much more than an inch from each other; which is an undeniable proof of 

 the existence of this species. And, in fine, the brass medal of Domitian has, 

 on one side, the figure of a rhinoceros with 1 horns on the nose, very plain. 

 From all which I cannot but be inclined to believe, that this medal was struck 

 from one of those of Africa; and that Martial had no more notion of a rhino- 

 ceros with one horn, than Bochart had of one with two. 



Augustini also, in his Dialogue of Medals, has a figure of the rhinoceros, 

 with 1 horns on the nose. So has also the figure in the Praenestan pavement, 

 made by order of Sylla the dictator, on which he certainly designed to represent 

 several animals, and other remarkable things, proper to Africa. 



Explanation of the Plates of the Rhinoceros. — Plate 18, fig. 5, is a side view 

 of the rhinoceros; fig. 6, a fore view of the rhinoceros, fore-shortened; fig. 7, 

 a back view of the same, fore-shortened. 



PI. 19, fig. 1, two views of one of the feet; a, the upper part of the foot; 

 b, the sole of the foot. 2, The tail of an old rhinoceros, in the museum of the 

 Royal Society. 3, The penis in an erected state; a, the first theca or praeputium, 

 of a dark colour; b, the second theca, being flesh-coloured ; c the tubular glans 

 penis. 4, A horn of a rhinoceros, said to be 6 years old, being about 10 inches 

 long. 5, The bottom or concave basis of the same, to show the cavity is very 

 superficial. 6, A beautiful horn in Dr. Mead's museum, being about 37 inches 

 long. 7, The horn of a rhinoceros, in the museum of Sir Hans Sloane, which 

 (as those of oxen are sometimes liable to distortions in their growth) differs 

 from the common form; it is 32 inches long. 8, The double horn mentioned 

 above, belonging to Sir Hans Sloane; whether they crossed each other on the 

 animal, is uncertain ; it is most likely they did not, but that by drying they 

 were crossed by the corrugation of the skin that joins them together. The 

 straight horn is 25 inches long, the curved one somewhat shorter, and the two 

 diameters of the bases 13 inches. 9, The concave bottoms of the above 

 double horns, as they adhere to the same piece of skin. 



yln jiccount of a Comparison lately made by some Gentlemen of the Royal So- 

 ciety, of the Standard of a Yard, and the several freights lately made for 

 their use; with the original Standards of Measures and fVeights in the 

 Exchequer, and some others kept for public use, at Guildhall, Founders' -hall, 

 the Tower, &c. By the Committee of the Royal Society. N° 470, p. 541. 



When there were some time since prepared, by order of the Royal Society, 



