454 Dr. A. Gunther 07i new Species of Fishes. 



scales between the second dorsal and the anal. Head rather 

 broader than high. The height of tlie body is contained five 

 times and a half in the total length (without caudal), the length 

 of the head three times and a half. Eyes rather close together, 

 somewhat shorter than the snout, and nearly one fifth of the 

 length of the head. Dorsal fins nearly as high as the body ; 

 caudal rounded ; ventral extending to the vent. Canine teeth 

 none. Light brownish, mottled with darker, the dark spots 

 having a tendency to form vertical stripes on the sides of the 

 body. An indistinct dark spot above the base of the pectoral. 

 Dorsal and caudal fins with small dark spots arranged in 

 series. 



Two specimens, 3| inches long, from Port Natal. Collected 

 by Mr. Ayres. 



Gastromyzon (g. n. Homalojytenn.). 



Distinguished from Homalojytera by having a great number 

 of rays in the ventral fins, which are united into a suctorial 

 disk. 



Oastromyzon horneensis. 

 D. 11. A. 7. P. 28. V. 21. L. lat. 74. 



Snout short, with semicircular outline and trenchant mar- 

 gin ; barbels very small. Eye small, entirely in the posterior 

 half of the length of the head. Lower lip fringed. Scales 

 smooth. Origin of the dorsal fin immediately in front of the 

 first ventral ray. Caudal subtruncated. Blackish brown ; 

 dorsal and caudal rays annulated with black. 



Several specimens from mountain-torrents of the interior of 

 Borneo. The largest examples are 3| inches long. 



The collector at Labuan has accompanied the specimens of 

 this most singular fish with the following notes : — " The fish 

 are only found in the rapid sources of rivers as they descend 

 from the mountains of the interior ; when disturbed they dart 

 rapidly across the swiftest cun-ent from one stone to another, 

 and stick like limpets to the stones, along which they crawl 

 slowly like a molluscous animal. These specimens come from 

 the sources of the Mingalong river." 



Chalcinus paranensis. 

 D. 11. A. 30. V. 7. L. lat. 32. L. transv. 6/2i. 

 The height of the body is contained twice and two thirds 

 in the total length, the length of the head four times. Oper- 

 culum twice as high as long, reaching to the vertical from the 

 axil of the pectoral. The scales- in the thoracic region are 



