2S6 MORROW — NOTES ON THE CARIBOO. 



Greatest breadth of left lung 7 in. 



.Right Lung. — 3 lobes. Upper lobe deeply cleft, with a small 

 lappet between it and the middle lobe. Tbe upper and 

 middle lobes were quite distinct. The lower lobe had a 

 large lappet nearly as large as the middle lobe. 

 Left Lung. — 2 lobes. Upper lobe deeply cleft, giving it 

 the appearance of two lobes. The lower lobe was quite 

 distinct from the upper. 



Weight of the heart - 2£ lbs. 



Length of the heart 8 in. 



Circumference of the heart 1 ft. 2^ in. 



Of these three Caribou, Dr. Sommers has given me his notes as 

 follows : — 



" The dissection of the young Caribou provided by you, for the 

 purpose of determining the anatomical structure and relations of 

 the laryngeal sac, described by Camper, as existing in the Keindeer, 

 together with subsequent examinations of the same parts in a female 

 calf and an adult doe are recorded below for your information. 



" 1st. Larynx, &c. Body of the hyoid bone, horse shoe 

 shaped, flattened laterally having an equal width from middle to 

 the cornua, which have a narrow termination, the representatives of 

 the corniculi in man being greatly developed ; they pass upwards 

 and backwards, measuring each over four inches in length, articula- 

 ting by cartilage with the upper border of the body near its median 

 line, separated, however, by an interval of about one-fourth of an 

 inch, each consists of three pieces with cartilaginous connections, 

 the united whole having the shape of a diminished human clavicle, 

 its acromial end being more curved and attached forward. The 

 larynx measured in front 2J inches ; behind, from upper border of 

 arytenoid to lower border of cricoid cartilages, 2£ inches in 

 length — circumference external 6^ inches ; internal diameter nearly 

 2 inches ; the inferior or true vocal cords and ventriculi laryngi 

 appeared faintly marked, for though visible when the larynx was 

 entire, they disappeared when the organ was laid open, its inner 

 face presenting an even surface from thyroid cartilage to sacculi 

 above. 



