1869. | MYOLOGY OF MENOBRANCHUS LATERALIS. 451 
muzzle, and is destitute of the lateral folds of skin; but the tail has 
a cutaneous fin both above and below, extending further forwards, 
inferiorly, than in the last-named genus. 
The skin is smooth and devoid of transverse wrinkles. A deep 
fold passes across the underside of the throat, as in the larvee of 
other Batrachians. 
The rounded cloacal aperture is placed very much behind the 
origins of the pelvic limbs. 
The forearm and leg are respectively but little shorter than the 
arm and thigh, and the pectoral and pelvic limbs are widely sepa- 
rated. 
The posterior digits are not broadened by cutaneous folds. 
The gape of the mouth only extends backward to about the eye, 
though it appears from the fold of the lips to recede further. 
The head is flat, the eyes destitute of eyelids, and a longitudinal 
groove runs along the middle of the back. 
Dimensions. 
inches. 
Extreme length from muzzle to tail-end............ 11°00 
Length from mandibular symphysis to middle point be- 
tween the arm-pits .....--- eee eee ete eee ee 2°16 
Length from the said middle point to anterior end of 
CLO AC Aimer Ree Ee ea OTE a WOR heey Shen tiene oe Bee 5°34 
Length from cloaca to end of tail ......... ....-. 3°25 
Length of head ........-4 eee seers e eens about 1°30 
Breadtbpot en dies) Sirota, deviate ae a8 olor win, 9's 1°19 
Vertiosl thickness) of Head), coc she bret wis iassel moral el carege rs 53 
Vertical thickness of mid-body .............. about 96 
Greatest breadth of body ........--s.sneneeeeeeee 1:07 
Transverse diameter of tail at about its mid-length .. 33 
Vertical extent of tail at the same place ...........- 1:00 
Distance between the eyes .......-....ee cere eee "57 
Extreme length of pectoral limb ................-- 1:27 
Extreme length of pelvic limb................++-- 1A7 
Distance from mid-point between the eyes to the end of 
Ge WTAE sc) ss cs ER el ostyers kahats Lt “40 
Distance between the origins of the pectoral and pelvic 
Hast bsh ad) GUE MIO och gots tee heres Scorss agit 24 +)? 4°51 
Distance of the origin of the pectoral limb from the 
mandi alex symiplysisns scgvyelsorsis,aysrsse4 + oie +0) 2°12 
Distance of the origin of the pectoral limb from the 
CHANT CRGNCRINES pci seal a 58 ae, see lev oii dom Sener. 34 0h 4:07 
Proportions. 
Length of head compared with its breadth at 100.... 109°2 
Height of head compared with its breadth at 100.... 44°5 
Length of body (from pectoral girdle to cloaca) com- 
pared with its breadth at 100 ...............-.. 499°0 
