618 DB. A. GUNTHER OX REPIILES, BA.TRACUIAXS, AXD [Xov. 7, 



from Mr. John-^ton tlirougli Mr. Sclater. The Reptiles' and Balra- 

 chians, liaviug been collected in nearly the same localities as those 

 of the first consignment, represent the same species which were 

 described in the first Report, but with the addition of several 

 others new to the Xyasa district. They will be enumerated 

 below. 



The most important portion, however, of this consignment 

 consists of Fishes from Lake Xyasa. Since the year ] 864, when 

 I described the skins collected and prepared by Livingstone's 

 companion, Sir J. Kirk (see P. Z. S. 1804, p. 303), nothing has 

 been done to advance our knowledge of the Fish Fauna of this 

 Lake. The only specimens which have reached me were collected 

 in 1891 by the Rev. J. A. Williams, who kindly presented them to 

 the British Museum ; they are noticed in the present report. 

 The specimens collected by Mr. AVhyte, the naturalist attached to 

 Mr. Johnston's staff', are unfortunately of small, many of very small 

 size ; but they reveal the remarkable fact, which has also been 

 observed in much smaller fresh\vater areas, like Lake Tiberias, that 

 the genera Chromis and Hemichromvi are represented in the same 

 river-basin not by one or two, but by a considerable number of 

 species closely allied to, but readily distinguishable from, each other. 

 To judge from the manner in which these fishes were distributerl 

 in the collecting-jars, the various species inhabit tlie same localities. 



To the list of species already given in my former report the 

 follow ing have to be added : — 



Cheloxiaxs : Cijdoderma frenatum (Ptrs.) ; Siernotltm-us sinu- 

 atus (Smith). 



LiZAEDS : Lygoaoina sundtvalli (Smith); Gerrhosaurus Jlavi- 

 gularis (Wiegm.); Hemidactylus mahouia (Moreau); Chamceleon 

 dilepig (Gray); Chamceleon melleri (Gray). 



SxAKES : Coronella oUvacea, var. dumer'dii (Gthr.) ; Dasypellis 

 scahra (L.) ; Psammo phis sihilans (L.) ; PsammopJiis sihilans, 

 var. intermedia (Fisch.) ; Ahfptidla negleda (Ptrs.) ; Dn/iojjhis 

 oatesii (Gthr.) ; A'fl/fr nvjricolUs (Rnhdt.) ; Causus rhomheatus (L.) ; 

 Clotho rhinoceros (Schleg.). 



Batraciiiaxs : liana johnstoni, sp. n. ; ('af'sina senerjalenr/nt 



' [Mr. Alexander "Wliyte, F.Z.S., who fills the post of Naturalist and KoKi- 

 culturir-t uuder Mr. Joljnston in tlie Central Afrit-an Administration, is resident 

 at Zomba, the seat of the Administration, which is situated on tlie south-east 

 slope of Mount Zomba, clo.se to tbe Mlungusi Stream, and is tberefore in tiie 

 watershed of Lake Sbirwa, not in that of tbe Zambe.si (see tbe article on 

 Eoutes and Districts in Southern Nyasaland by Lieut. B. L. Scbitcr, R,E., in 

 the ' Geographical Journal,' vol. ii. p. 419, Nov. 1893). In November 189l', 

 Mr. Whyte accompanied H.B.M. Commissioner in a journey to Fort John.ston, 

 which is situated on the east bank of the fpper Shire, about tv\o niihs below 

 its exit from Lake Nyasa. It was upon this occasion that the collection of 

 Fishes described by L>r. Giinther in the present paper was made, as I find bv 

 reference to his letters. Fort Johnston, Zomba, and most of the other localities 

 from which Mr. Johnston's various collections have been received are sliown in 

 the map (p. til7;, which ha» been repiinted (with emendations^ from that ia the 

 • Geographical Journal' for 1893, p. 249.~P. L. S.] 



