12 Mr. G. A. Boulenger on newly-discovered 
So far as I have yet been able to determine, the develop- 
ment of the crocodile closely resembles that of the bird. A 
noticeable feature is the tail, which is of great length at a 
very early stage, and is at first rolled up in a spiral form, and 
afterwards, when the embryo is more strongly bent, twisted 
round the neck. 
That the rudiment of the egg-tooth appears very early has 
already been mentioned. 
Rudiments of the genital protuberance are already to be 
seen in embryos which are about 10 millim. long (measured 
in the bent position). A rod-shaped structure may then be 
observed between the posterior legs ; it is about 1 millim. in 
length and protrudes from the cloaca, with the anterior wall 
of which it is fused. It at first les parallel to the median 
line of the abdomen, is subsequently erected, and finally com- 
pletely retracted within the opening of the cloaca. It is not 
until the embryos are almost full-grown, after about two and 
a half months, that the genital protuberance begins to 
disappear altogether, and is then only to be seen by separating 
the lips of the cloaca. 
IX.—On newly-discovered Hast-African Chameleons, with 
Remarks on some other feptiles described by Dr. Stein- 
dachner. By G. A. BOULENGER. 
JUDGING from the number of descriptions recently published* 
it would seem that the Chameleon fauna of Kast Africa is 
likely soon to rank next to that of Madagascar with regard 
to variety of species. I have, however, no doubt that the 
list of species has to be reduced by three, of which two 
have just been described by Dr. Steindachner and the third 
by Mr. Stejneger. On comparing the descriptions and 
figures of Chameleon Hohnelit and letkipiensis with the late 
J. G. Fischer’s account of Ch. biteniatus and the specimens 
in the British Museum, I cannot come to any other conclusion 
but that they all belong to one and the same species, Dr. 
Steindachner’s specimens being fully-developed males. The 
* Chameleon spheropholis (Victoria Nyanza) and Fischeri (Usagara ?), 
Reichenow, Zool. Anz. 1887, pp. 3870 and 371; Ch. Roperi (Kilifi), 
Boulenger, P. Z. 8. 1890, p. 85, pl. vill. fig. 4; Ch. Hohnel (Leikipia, 
west of Kenia, 6000 feet), leikipiensis (Leikipia), and tavetensis (Taveta, 
foot of Kilimandjaro), Steindachner, Anz. Ak. Wien, 1891, pp. 141 and 
142, and Sitzb. ©. 1891, pp. 507, 509, 310, pl. i.; Ch. Abbotti (Kilima- 
ndjaro), Stejneger, Bull. U.S. Nat. Mus. xiv. 1891, p. 853; ARhampho- 
leon Robecchit (Somaliland), Boulenger, Ann. Mus. Genova (2) xii. 1891, 
p: LL, plon figs. 
