DK. J. MURIE 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 3-9 



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



Distant from the angle of the mouth — l-y 



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 



