710 MR. G. A. BOL'LENGEK OK AERlCyVN HATBACHlANS. j Dec. 17, 



papilla) much more developed than in the original specimens, whilst 

 the females show no trace of them. The larger male, which is 

 figured here (PL XXXVIII. fig. 1), measures 107 millim. from 

 snout to vent, and the villosities measure up to 7 millim. on the sides 

 of the body, 5 on the sides of the thighs ; the second male measures 

 100 millim, from snout to vent, and the villosities of the body 

 and thighs 15 and 12 millim. respectively. I have also ascertained 

 that the claw-shaped phalanx of the toes is present as in Gamjis- 

 osteom/ic, but does not always project through the skin. 



Pour specimens of Gampsosteonyx; were obtained in the Bulu 

 Country. These further substantiate the comparison which I 

 established between the exposed extremity of the claw-like phalanx 

 of the toes and the end of the ribs in Phurodeles, since here like- 

 wise the character is not an attribute of all individuals ; in two 

 out of the five specimens examined, the curious conformation could 

 not be detected externally. One of these specimens I ha^ e had 

 prepared as a skeleton, and, to my great - surprise, it was found 

 that distally and dorsally to the " claw " there is a small detached 

 ossification, which is also well shoAvn in a sciagraph of another 

 specimen, kindly taken for me by Mr. Gardiner, to whom T am 

 indebted for similar favours in the past. This unique feature is a 

 great puzzle. Is it to be looked upon simply as an additional 

 ossicle, or are we to assume that the intercalary ossification which 

 occurs between the penultimate and distal phalanges of many 

 Eanid genera has here attained an exceptional hypertrophy, w^hilst 

 the distal has undergone atrophy ? Another very peculiar feature 

 of the limb-skeleton of Gampsosteonyx is the presence of large 

 sesamoid bones under the articulations of the metacarpals with 

 the basal phalanges of all four fingers and of the first and second 

 phalanges of the two outer fingers. Smaller sesamoid bones are 

 present in the pes. The number of phalanges in the manus is 

 the same as in Bana, viz. 2, 2, 3, 3. The whole skeleton is typically 

 Eanid, but the so-called sternum is only strongly calcified, not 

 bearing a true bony style, as stated in tiie original description; 

 the omosternum, on the other hand, is supported by a bony 

 style, which is forked at the base. 



As in TrichohatracJius, the ova are of great size. A female 

 measuring 80 millim. Irom snout to vent contains about 15 ripe 

 ova on the right side and 30 on the left, each measuring 4 millim. 

 in diameter. A breeding male, measuring 52 millim. from snout 

 to vent, is provided with an internal gular vocal sac, and the inner 

 surface of the inner metacarpal joint is covered with a black layer 

 formed of crowded minute horny asperities. 



EXPLANATION OF PLATE XXXVIII. 



Fig. 1. Trichoba/rachus robiisf//s, breeding male. 



2 Gam23sositeonyx hatesi, lower aspect of .skelel^on of right manus, xlj. 

 3. Side view of skeleton of left foot of same, x li. 



