1900.] BATBACHIANS AIST) BEPTLLES OF THE GABOON. 437 



close resemblance and are no doubt functionally analogous with 

 the subdigital lamellae of the scansorial Geckos. Such a structure 

 had not been observed before in any Batrachian. Buchholz and 

 Peters have not alluded to it otherwise than by mentioning 

 " dunkle Querlinien unter den Zehen," which I believe to be the 

 result of an optical delusion caused by the lamella? to which 

 attention is now drawn. 



The male, which is devoid of vocal sacs, measures only 17 millim. 

 from snout to vent ; the female measures 21. 



Banid^:. 



11. PiANA CRASSIPES PtrS. 



This species is known from Camaroons and the Gaboon. I have 

 examined 10 specimens collected by Mr. Bates on the Benito 

 Biver, the largest measuring 63 millim. from snout to vent. 



As pointed out by Giinther (Ann. & Mag. N. H. [6] xvii. 1896, 

 p. 266), the vomerine teeth are sometimes absent ; this is the case 

 in three of Mr. Bates's specimens. When present, they form two 

 very small groups just behind the level of the choanae. The 

 tympanum is more or less distinct, measuring three-fourths or 

 fourth-fifths the diameter of the eye. The colour of the upper 

 parts varies from greyish olive or purplish brown to blackish, with 

 or without very indistinct darker and lighter spots or marblings ; 

 dark cross-bars on limbs usually irregular, sometimes absent ; lower 

 parts white, throat often spotted or marbled with dark brown. 



12. Ban a subsigillata A. Dum. 



This species, which has been well figured by A. Dumeril, is 

 known from Old Calabar, Camaroons, and the Gaboon. Several 

 specimens were collected by Mr. Bates on the Benito Biver, the 

 largest measuring 88 millim. from snout to vent. 



The species is remarkable for its long head without canthi 

 rostrales, and its short limbs, the tibio-tarsal articulation reaching 

 the tympanum ; the diameter of the latter is two-thirds to three- 

 fourths that of the eye. The upper parts are of a dark brown, 

 but the sides of the head and body and the fore limbs are often 

 tinged with bright carmine. The lower parts, in the young, are 

 olive, with close-set round pale yellow spots on the throat and 

 belly ; with age, the dark colour between the spots becomes 

 reduced to a network, which may even almost entirely disappear. 

 Some specimens have a rather indistinct flat round gland under 

 each thigh, as in most species of the genus Mantidactyhis. 



13. Rana yEQUiPLiCATA "Werner. 



Rana mascareniensis, var. cequiplicata, Werner, Verh. z.-b. Ges. 

 Wien, xlviii. 1898, p. 192. 



Vomerine teeth in two short oblique series commencing from 

 the inner front edges of the choanae. Head moderate, as long as 

 broad or a little longer than broad; snout pointed, longer than the 



