528 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 95 
pterygoid series 6-6, separated slightly from the vomerine series, 
which consists of 14-15 teeth separated medially by a rather wide 
diastema; a narrow, deep palatine pit. Choanae elongate, the inner 
edge with a slight outward projection; mandibular teeth about 22-20; 
the splenial teeth are almost gone, there being but two on one side 
and four on the other. 
Limbs slender, the digits but little flattened; order of lengths of the 
fingers is 1, 4, 2=3, although the difference in one and four is not 
ereat; lez scarcely heavier than arm; in toes the order of length is 1, 
5, 2, 4, 3 (on the left foot; right foot abnormal in having the second 
and third toes very short). Adpressed limbs have toes sepsrated 
from elbow by 1% folds (male) (to 2% in females); an inner tubercle at 
base of palm and sole, outer tubercle absent (present in part of the 
paratypes). 
Tail greatly compressed, slender, the ventral fin reduced to a trace. 
The dorsal fin low, beginning behind level of insertion of hindlimbs 
and nowhere reaching an elevation of more than one-fourth of the 
depth of the tail. Total depth at base of tail (18 mm.) a little more 
than greatest depth of body (14.6 mm.). 
The cloaca (male) is considerably inflated and possesses numerous 
papillae, which are widened at their bases and somewhat flattened. 
Color.—Dorsal and lateral surfaces generally uniform purplish 
black, the color not intense; limbs similarly colored, but of a slightly 
lighter shade; chin and lower surfaces of limbs partly clouded with 
light lavender; abdomen purplish lavender (brownish in preserved 
specimens). The edges of the lips, tips of the digits, and a narrow 
ventral fin on tail dirty whitish or cream. 
Measuremenis in mm.—Snout to posterior end of vent 64; tail 49; 
width of head 15; length of head 19; axilla to groin 28; arm 20; leg 22. 
Variation.—The youngest larva measures 40 mm. from snout to 
vent; tail, 37 mm. The specimen is dark, with numerous light spots, 
which are more or less connected laterally. The ventral parts are 
cream. The maxillary-premaxillary teeth are 19-18; the pterygoid 
7-9; vomerine about 13-18, these in an irregular row but the pterygoid 
teeth probably in two rows; splenial teeth about 14-14. The dorsal 
fin can scarcely be traced as a low flattened ridge to head, but there is 
appreciable elevation to about middle of back. ‘The neuromast sys- 
tem appears on the head as a series of openings from nostril to above 
the orbit, another series below the orbit, and one on the lower jaw; 
the openings are stoma-like. The three lateral trunk systems are 
probably undeveloped although a few pores can be discerned; in speci- 
mens somewhat larger, only occasionally can a pore be discerned, 
even with proper magnification. Digits of the younger larvae are 
much more flattened than in the type. Under water a few of the 
specimens show traces of cloudiness in the coloration; the largest 
