PROFESSOR OWEN ON THE AYE-AYE. 73 



more sparing and in more minute aggregates. Both were evidences of the food supplied 

 to the Aye-aye after its recapture. 



The mesenteric gland forms a mass at the root of the mesentery, 2 inches 3 lines in 

 length, and half an inch across its widest part. 



Alimentary Glands. — The parotid gland, flattened and lobulated, has a subtriangular 

 form, measuring I inch 3 lines by 1 inch, extending in front of the ear from a little above 

 the meatus to beneath the mandible, where it comes in contact with the submaxillary 

 gland. The parotid duct leaves the gland about three lines above the lower margin of 

 the mandible, crosses the masseter, and penetrates the buccal membrane close to the 

 angulus oris, nearer the upper than the lower molars. 



The submaxillary gland is thicker, more globose in form, and more compact in texture 

 than is the parotid ; it is 10 lines in length by 5 in breadth. I neglected to trace its 

 duct before- removing the glands in dissecting the digastric and other muscles, which 

 I much regret. 



The liver, 3| inches in breadth and 2 inches in length, consists of the usual three 

 primary lobes, viz., the ' right,' ' cystic,' and ' left ' lobes'. The ' right ' is the smallest, 

 and sends off a ridge-like process, representing the ' Spigelian lobule.' The ' cystic ' 

 lodges the gall-bladder in a fissure traversing a third of the length of the lobe from its 

 free margin ; and an ' umbilical lobule ' is marked out on its left, by the suspensory 

 peritoneal fold including the umbilical vein. The left lobe, which is the largest, is 

 notched posteriorly, but otherwise is entire. The fundus of the gall-bladder makes no 

 appearance upon the convex side of the liver. The cystic duct receives the hepatic 

 half an inch from the neck of the bladder : the common duct, after a course of nine lines, 

 enters the back part of the duodenum, about six lines from the pylorus. 



The pancreas is a broad thin gland ; it extends from the splenic vessels to the 

 duodenum, continuing as the ' small pancreas,' a little way beyond the entry of the duct, 

 which is close to that of the gall-duct, and here sending off numerous narrow processes 

 into the fold of the mesentery. 



The spleen is an elongated, trihedral body, bent at nearly a right angle on itself, the 

 lower portion being nearly half the length of the upper one (a, b). 



^ 9. Respiratory and Circulating Organs. 



The glottis (PI. XXIV. fig. 7, g), a slit of 6 fines in length, is bounded by slender, 

 well-defined ' chordae vocales ' proceeding from the arytenoids (PI. XXII. fig. 3, t) 

 to the fore part of the thyroid {ih. r). Between these and the overlapping epiglottis 

 (e) is included a large and deep pouch, from which a small median sacculus {ih. s) 

 is produced between the beak of the thyroid and the thick basal attachment of the 

 epiglottis. The thyroid cartilage {ih. r) is shaped like the keel-less prow of a boat, being 



' 1 adhere to the homology and nomenclature of the hepatic divisions in the Mammalia, used in my " Cata 

 logue of the Physiological Series," Mus. Coll. Chir. 4to, vol. i. (1833) pp. 237, 238. 



VOL. V. — PART II. L 



