168 DR. BASHFORD DEAN ON THE [Feb. 20, 



30. NOTOTRAGUS MELANOTIS Tliunb. 



Nototragus, nom. nov., Thos. & Schw. Abstr. P. Z. S. No. 27, 

 p. 10, Feb. 27, 1906. 



c?. 1051. $.1059. Plettenberg Bay. 



We are glad to express our agreement with Dr. Jentink * in 

 considering that the Grysbok should be generically separated from 

 the Steenboks on account o£ its possession of supplementary hoofs. 

 In the skull also it may be distinguished by its larger anteorbital 

 pits, which ai-e shaped very much as in Ourebia, with a marked 

 ridge above them, running across the laci-ymals. 



But in using Sundevall's name of Calotragus for this animal, 

 Dr. Jentink has not noticed that that author expressly selected 

 his " species prima" {Calotragus tragulus — RapJiicerus campestris) 

 as the type, so that in no case could the name be used for the 

 Grysbok, to which we would therefore propose to apply the above- 

 given generic teim. 



With regaid to the use of RajjMcerus, we can only reiterate the 

 opinion given in the ' Book of Antelopes,' that Blainville's figure 

 of " Antilope acuticornis," on which the name hangs, is either the 

 common Steenbok (as we suppose) or at least a species congeneric 

 with it. 



31. Tragelaphus sylvaticus Sparrm, 

 $. 1050. Knysna. 



4. Notes on the Livino- Specimens of the Australian Lung- 

 fish, Ceratodus forsteri, iu the Zoological Society's 

 Collection. By Bashfoed Dean, Ph.D. f 



[Received November 6, 1905.] 



(Plate IX.J and text-figs. 53-55.) 



During a recent visit to London, September 1904, I was 

 given the opportunity of examining specimens of Ceratodus in 

 the aquarium of the Zoological Society's collections. And the 

 following notes are presented, since they add several details to our 

 I'ather scanty knowledge of the habits of this impoitant and rare 

 form. 



The foUowiug- is an abstract of the more important accounts of living- 

 Ceratodus: — 



Habits in general. — Never goes out of water .(according to «I1 recent 

 authors), could not be " made to progress in only a few inches of water " 

 (Ramsay, similarly Spencer). Passive, helpless out of water (Spencer, 

 Semon, Illidge), and dies within one or two hours (Semon), or eight to 

 ten hours (Spencer) : if kept moist, however, it will Hve for a long time 

 (O'Connor), e.</. if wrapped in wet water-weed. In general hardj' and 

 now acclimated in a number of Australian rivers. Under usual conditions 

 sluggish, " too lazy to get out of the way when about to be handled " 



* Notes Leyd. Mus. sxii. p. 33 (1900). 

 t Communicated by R. I. Pocock, F.Z^.S, 

 X For explanation of the Plate, ^^ee p. 178. 



