618 DR. A. GtJSTHER ON REPTILES, BATRACHIANS, AND [Xov. 7, 



from Mr. Johnston through Mr. Sclater. The Eepfciles and Batra- 

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

 of the first consignment, represent the same species which were 

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

 others new to the Nyasa district. They will be enumerated 

 below. 



The most important portion, however, of this consignment 

 consists of Fishes from Lake Nyasa. Since the year 1864, when 

 I described the skins collected and prepared by Livingstone's 

 companion, Sir J. Kirk (see P. Z. S. 1864, p. 303), nothing has 

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

 Lake. The onlv specimens which have reached me were collected 

 in 1891 by the Eev. J. A. AVilliams, who kindly presented them to 

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

 The specimens collected by Mr, Whyte, the naturalist attached to 

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

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

 observed in much smaller freshwater areas, like Lake Tiberias, that 

 the gejiera Chromis and Hemichromis 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 distributed 

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



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

 following have to be added : — 



Cheloniaxs : Cydoderma frenatum (Ptrs.) ; Siernothcerus sinu- 

 aius (Smith). 



Lizards : Lygosoma sundevalli (Smith) ; Oerrhosaunis flavi- 

 qidaris (Wiegm.); Hemidactylxis mahouia (Moreau) ; Chamceleon 

 dilepis (Gray); Chamcehon melleri (Gray). 



Snakes : Coronella oUvacea, var. dumerilii (Gthr.) ; Dasypeltis 

 scahra (L.) ; Psammophis sibilans (L.) ; Psammojihis sihilans, 

 var. intermedia (Fisch.) ; AJiahdla neylecta (Ptrs.) ; DryiopMs 

 oatcsii (Gthr.) ; Naja niyricollis (Enhdt.) ; Causus rhombeatus (L.) ; 

 Clotho rhinoceros (Schleg.). 



Batrachiaxs : liana joknstoni, sp. n. ; Cassina seneyalensis 



^ [Mr. Alexander Whyte, F.Z.S., who fills the post of Naturalist and Horti- 

 culturist under Mr. Johnston in the Ceutral African Administration, is resident 

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

 slope of Mount Zomba, close to the Mlungusi Stream, and is therefore in the 

 watershed of Lake Shirwa, not in that of the Zambesi (see the article on 

 Routes and Districts in Southern Nyasaland by Lieut. B. L. Sclater, R.E., in 

 the ' Geographical Journal,' vol. ii. p. 419, Nov. 1893). In November 1892, 

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

 which is situated on the east bank of the L'pper Shire, about two miles below 

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

 Fishes described by Dr. Gtinther in the present paper was made, as I find by 

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

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

 the map (p. fil7), which has been reprinted (with emendations) from that in the 

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



