416 



the tarsus has a cutaneous fold, the metatarsus two tubercles. The 

 toes are half-webbed, the third and fifth bemg equal in length. 



The colour of the upper parts is a uniform brownish -black, of the 

 lower parts a dirty greyish-brown ; the upper eyelids, the sides 

 of the trunk, and the extremities exhibit small, smooth, bluish 

 tubercles. 



Two specimens are in the collection. 



inches, lines. 



Length from the snout to the vent 3 6 



Length of the head 11|^ 



Breadth of the head 1 3^ 



Length of the parotid 9 



of the anterior extremity 2 6 



of the third finger 8 



of the posterior extremity 4 9 



of the fourth toe 1 5 



5. Otilophtjs margaritifer, Laur. 



6. Hylodes unistrigatus, n. sp. 



Diagnosis. — Habit as in Hyla arborea. Skin smooth above, gra- 

 nular on the sides and on the belly ; a fold across the chest. Vomer- 

 ine teeth in two oblique series ; tongue ovate, with an exceedingly 

 slight nick behind. Olive (in spirits), marbled with darker ; a fine 

 white dorsal line from the snout to the vent. 



Description. — This species would be taken for a Hyla at the first 

 glance : the snout is rather short and rounded anteriorly and over 

 the canthus rostralis ; the tongue is ovate, with the posterior two- 

 thirds free, and with a scarcely visible nick. The vomerine teeth 

 are arranged apparently in two oblique series, but can scarcely be 

 distinguished on account of the small size of the species. The width 

 of the tympanum is one-third of that of the eye. There is a distinct 

 fold across the chest, as in many species of Hyla. The extremities 

 are short, the disks of the fingers and toes of moderate size ; the 

 fifth toe is rather longer than the fourth. The upper parts are dark 

 olive, marbled with brown ; a fine white dorsal line reaches from the 

 tip of the snout to the vent ; the lower parts are whitish, the throat 

 marbled with brown. 



There are several specimens in the collection, among which is an 

 adult female, with the eggs comparatively as large as in Hylodes 

 conspicillqtus. 



inches. Unes. 



Length from the snout to the vent 1 1 



of the anterior extremity 7^ 



of the posterior extremity 1 4 



7. Hylodes conspicillatus, Gthr. Batrach. p. 92. 



There are many specimens of this species in the collection, and 

 among them two varieties : the one with a white margin on the 

 upper lip, the other with a white lateral stripe from the tip of the 

 muzzle above the eye to the loin. 



