A CONTRIBUTION TO THE ICHTHYOLOGY 195 



Pogoneleotris microps was described by Professor Max 

 Weber 1908 on specimens from New Guinea, which has hitherto 

 been the only known habitat of this species. It is therefore 

 rather interesting to state, that this form, which is unknown 

 from the sea, also extends its range to the continent of Austraha, 

 being one of those species of fresh-water fishes, which indicate 

 an affinity between New Guinea and Northern Australia. 



Prof. Max Weber has kindly compared one of my speci- 

 mens with his original specimen from New Guinea and stated, 

 that it is quite in agremeent with a specimen of corresponding 

 size from that island. 



Pseudoba,trachus dahli n. sp. 

 Locality: Roebuck Bay . . . Seven specimens, 136 (type) — 



65 mm. (c. c.) 



D. Ill, 22 or 21 (22 in six specimens, 21 in one); A. 19 or 

 18 (in resp. five and two specimens). Width of head 1,3 to 1,2 

 in its length, which is 2,9 in that of the body and 3,6 in the 

 total length. Diameter of eye about subequal to the length of 

 the snout in specimens between 115 and 136 mm., larger in the 

 smaller ones, the proportion being 0,7 in the smallest specimen 

 (65 mm.) Likewise, the proportion between the eye and the 

 length of the head varies with size, in the type-specimen it is 

 5,3, in the smallest specimen 4,0. The interorbital width is 

 somewhat smaller than the diameter of the eye, being contained 

 about 1,1 in the same. Bony interorbital space 1,8 — 1,9 diameter 

 of eye in the larger specimens (> 100 mm. tot. length), 2,3 in 

 the smaller ones. 



Mouth with wide horizontal cleft, the lower jaw projecting; 

 maxillary extending to below hindborder of eye. Jaws laterally 

 with a single series of conical teeth, those of the mandible much 

 the stronger; the praemaxillar and the mandibular teeth are 

 biserially arranged anteriorly. Vomerine and palatine teeth strong 



