1887] Oviposition and Nursing in the Genus Dendrobates. 311 
The ova are deposit ted in damp situations or on leaves, and the embryo 
aie the egg in the perfect air-breathing form. 
Rana oe Blgr.; Hylodes ag tp D. & B: 
e ova are carried on the 
a. erty the 
a. Round ‘the legs; the young leaves the egg in the tadpole i state. 
8. In a gular (the vocal) sac; the young is expelled in the perfect state. 
Rhinoderma. 
D: iA the fema. 
Attached i ‘the belly. 
ja ba reticulatus Gthr. 
p. Atta ched to the ba ck; 
aa. The young completes its i within the egg. 
Pipa. 
66. The free tadpole is carried on the parent. 
Dendrobates. 
; y- isy a dorsal pouch. 
~ The young leaves the pouch in the tadpole state. 
Nototrema marsupiatu m D. & B. 
he young leaves the pouch in the perfect state. 
Nototrema pestle Esp.4 Ofisthodelphys ovifera Weinl. 
- It approaches nearest to the habit of the Pipa monstrosa, which 
also carries the young on the back. But, as is well known, the _ 
skin itself and not a gelatinous secretion encloses the eggs in 
that species and retains the young until the metamorphosis is 
complete. The Dendrobates, however, furnishes a hint as to the 
origin of the temporary growth in Pipa. 
Several larvæ accompany one of the specimens of this species, 
which stated by Mr. Smith to have been adhering to its back 
when it was taken. They do not resemble those of Pipa, but 
rather those of Rana or Bufo. The branchial opening is on the 
left side, and no limbs are developed. The tail is long. The 
mouth is not peculiar. The decurved lower lip is present, and 
is furnished with two transverse series of bristle teeth. A single 
series of the same extends entirely across the superior labial 
region, above the upper horny jaw. The papille are rather 
long, and extend all round the inferior lip, and for a short dis- 
tance on each side at the lateral end of the upper lip, the series 
presenting an entering angle opposite the mouth. This species 
is described and figured* by Steindachner in the Verhandl. der 
k. k. zoblog. botan. Ges. in Vienna, 1864, p. 258, who refers it to 
the D. irivittitus (“ nigerrimus”), under the impression that the 
specimens before him are not adult. He states the latter were 
labelled Dendrobates braccatus by Dr. Fitzinger. This name is 
not adopted by Steindachner. 
* Plate XIIL, Fig. 2. 
