DE. J. MFRIE ON THE FOEM AND STEUCTUEE OF THE MANATEE. 129 



Female. Male. 



Body generally. inches. inches. 



Extreme length, from the snout to the tip of the tail . . 65-0 48-0 



Girth of neck just behind vertex of cranium — 24-5 



Girth immediately in front of the pectoral extremities . . 32-5 25-5 



Girth immediately behind the pectoral extremities . . . 39-5 28-5 



Girth about 4J inches in front of the umbilicus .... 47-0 29-5 



Girth at the umbilicus 51'0 31'5 



Girth at the opening of the penis in the male — 32'5 



Girth at about 3 inches in advance of rectum in male, or 



equivalent to the position of the vulva in female . . . 41-0 28-0 



Girth at the anus 35-5 20-0 



The Head. 



Extreme length, or distance between the muzzle and occiput 11'3 9'0 



Girth at the snout, including the lower lip 14-0 12'5 



Girth vertically before the eyes, including the lower lip • 18-6 15-0 

 Girth behind the projecting part of lower lip, vertical to 



the eyes 20-0 17-0 



Girth, middle of head, just anterior to projection of mandible 23-0 20-5 



Oral region, or length of side of the mouth 2'2 1"9 



Length of under lip, following tegumentary curve ... 4-5 3-0 



Breadth of chin, following tegumentary curve 4"0 2'5 



Breadth of chin at the angles of the mouth 5"0 — 



Muzzle and Nostrils. 



Measurement of arch over muzzle covering nostril . . . 8"5 7'0 



Nasal orifices, distance behind free end of muzzle .... — 0-4 

 Nasal orifices, diameters across and vertically, when dilated, 



about 0-5 0-5 



Nasal orifices, distance apart at inner angles, about . . . 0'5 0-3 



Nasal orifices, distance apart at outer angles 1"7 1'35 



The Eye. 



Diameter 0-5 0-3 



Distance from front of muzzle (outside) 5'0 3'3 



Distance from front of muzzle (mesially) 6-0 4-0 



Distance from the inner angle of nostril 4-5 3-0 



Distance between them at their centres 7-0 4-3 



Distant from the angle of the mouth — 1'9 



The Ear. 



Auditory orifice distant from posterior angle of eye . . . 4-0 2-8 



Auditory orifices apart from each other in diameter . . . 7'0 — 



x2 



