Bibliographical Notices. 53 



The small lachrymal canal is situated without the orbit, just below 

 its inner angle. This latter cavity communicates by a large opening 

 with the temporal fossa. The outer margin of the orbit forms a perfect 

 ring. The humerus has an opening in a prolongation on the inside 

 of its lower extremity (foramen supra-condyloideum), for the passage 

 of the median nerve and radial artery. The thumb of the fore-hand 

 is small. The muscular system presents many peculiarities in origins 

 and insertions. A plantar muscle was not met with. The palate is 

 furnished with six transverse folds. Below the tongue is a small 

 tendinous plate, with its anterior extremity free, and the other strongly 

 attached to the muscular tissue of the tongue*. The length of the 

 intestinal canal from the mouth downwards is 24 '3 English inches. 

 Its proportionate length to that of the body is as 4*9 : 1. The con- 

 tents of the canal were for the most part the remains of insects. 

 The caecum was filled with intestinal worms, most probably. Dr. 

 Kingma considers, belonging to a species of Oxyuris. 



The arterial system presents some peculiarities deserving of notice. 

 At the arch of the aorta two branches are given off, the innominata 

 and the left subclavian. The former gives off in succession the left 

 and right carotids, and is continued into the right subclavian. The 

 brachial artery divides in the middle of the arm into two branches, 

 one of which is a continuation of the trunk, and passes, with the 

 median nerve, through the foramen supra-condyloideum, to become 

 the radial artery ; the other branch goes to the superficial muscles 

 of the fore-arm. Both these branches of the brachial artery consist 

 of a plexus of small vessels, six to eight in number, which are of 

 equal diameter. The first branch continues in the divided state 

 through the foramen, and could not be traced further ; the other, as 

 we have said, loses itself in the muscles. 



After the abdominal aorta has given off the two internal spermatic 

 arteries, it is suddenly greatly dilated, so that its lumen acquires 

 more than double its previous area. The dilatation is not limited 

 to the aorta, but is perceptible in its branches, the crural having a 

 greater circumference than the aorta itself before it gives off the 

 renal artery. The arteria sacralis media is large, and arises from 

 the aorta just above its division into the two iliacs. It proceeds at 

 first undivided towards the posterior part of the pelvic cavity, and 

 then separates into from 6 to 8 small branches of equal size running 

 near each other, whilst a larger undivided branch is continued as the 

 main vessel. The first branch of the common iliac forms the crural 

 artery. This very soon gives off a plexus of about 8 branches of 

 equal magnitude, besides some muscular branches, whilst the main 

 trunk pursues its course. This plexus of vessels proceeds to the 

 popliteal space, and is again united into one trunk. This disintegra- 

 tion and redintegration, if we may so term it, of the crural artery 

 is beautifully exhibited in one of M. J. V. d. Hoeven's delicate 

 lithographic figures (fig. 8). In the femoral and sacral plexuses, 

 therefore, there remains a continuation of the primary trunk ; but in 



* This peculiar organ is described in Mr. Baird's interesting history of 

 his specimen of the Lemur tardigradus, Loudon's Mag. Nat. Hist. i. 208.^ 



