EAST AFRICAN REPTILES AND AMPHIBIANS 115 



Material. — Two specimens in the National Museum as listed 

 above; also specimens in the Museum of Comparative Zoology from 

 the following localities in Tanganyika Territory — namely, Duthumi 

 (Nos. 9524-5), Morogoro (Nos. 9528-9), Nyange (No. 13337), Tawa 

 (Nos. 13338-46), Dar es Salaam (Nos. 13347-56), Kizerui (Nos. 

 13357-60)— and 11 unregistered specimens, one of which has been 

 sent to the British Museum. Also from Mkokotoni, Zanzibar 

 (Nos 10196-7), the last two being collected by A. Voeltzkow'. 



Diagnosis .—This species differs from M. fulvovittatus with which 

 it has hitherto been confused in the following points : 



1. Smaller size demonstrable as follows: 



Range in length from snout to vent of 9 topotypic fulvovittatus 23-27 mm. 

 Average length from snout to vent of 9 topotypic fulvovittatus 25.5 mm. 

 Range in length from snout to vent of 41 brachynemis 18-25 mm. 

 Average length from snout to vent of 41 brachynemis 20.6 mm. 



2. Proportionately smaller tibiae as shown by the following: 



Length of tibia is contained in total length of fulvovittatus 2.07 to 2.26 times. 

 Average of tibia contained in total length of fulvovittatus 2.15 times. 

 Length of tibia is contained in total length of brachynemis 2.29 to 2.63 times. 

 Average of tibia contained in total length of brachynemis 2.42 times. 



3. Shorter fingers and toes of brachynemis; this could doubtless be demon- 

 strated by delicate measurements were one so disposed to expend the time. 



4. Snout shorter and blunter. 



5. More slender habit, the body being but rarely broader than the head. 



6. Faintly defined, or altogether absent, dorsal stripes. 



I was of the opinion that the third and fifth toes were more strongly 

 webbed in hrachynemis, but Parker informs me that they can be 

 matched among West African fulvovittatus. 



Description. — Head as broad as long; snout bluntly rounded, slightly 

 projecting, longer than the orbital diameter (measuring the snout as 

 from the anterior border of the eye); can thus rostralis rounded and 

 indistinct; loreal region sloping, not concave; interorbital space 

 almost equals the upper eyelid; the transverse orbital diameter about 

 equals the distance from the anterior border of the eye to the nostril; 

 tympanum hidden. Fingers and toes short, dilated at their tips, 

 fingers not webbed, or with an indistinct trace of webbing; toes 

 strongly webbed to the first joint of the first toe and the outer aspect 

 of the second to halfway between the first joint and the disk on 

 the inner aspect of the second, to the second joint on one side of the 

 third and to the disk on its other aspect, to the third joint (thence 

 sometimes as a narrow margin to the disk) on both sides of the fourth, 

 to the disk of the fifth; the tibio-tarsal articulation of the adpressed 

 hind limb reaches to a point between the base of the fore limb and the 

 eye (this is also the case with 34 of the specimens, but in 4 Dar es 

 Salaam frogs, 1 of which is a female, and in 1 Zanzibar specimen it 

 just reaches the eye). 



