474 Dr. A. Giinther on a new Siluroid Fish from Ceylon. 
fore be satisfied with mentioning here that this species is, cu- 
riously enough, so closely allied to the A. fissus, that, but for 
the remoteness of their respective habitats, we should almost 
have hesitated to separate them specifically. The female may 
be externally distinguished by a broad oblique fold of the skin 
on the inner side of the ventral fins. The second species is 
Arius Layard, sp.n. Plate XV. 
-This species is closely allied to A. tonggol and A. argyropleu- 
ron, from the East-Indian archipelago, but differs in having no 
trace of vomerine teeth, and in possessing longer maxillary 
barbels. 
D735} \AmiSar AP yaya, 
The height of the body is contained four times and four- 
fifths in the total length (without caudal), the length of 
the head three times and one-third; head depressed, broader 
than high, its width being three-fifths of its entire length, 
or equal to its length without snout. Head above nearly 
entirely covered by skin, only the ridge of the occipital pro- 
cess being granular. Occipital process triangular, with the 
lateral margins straight, longer than broad; it is raised into a 
median ridge along the middle, which, on the head, is continued 
as a narrow, deep, uninterrupted groove, terminating on the 
snout. Basal bone of the dorsal spine narrow. Vomerine teeth 
none; teeth on the palate coarsely granular, in two pear-shaped 
groups, situated as far back as in A. tonggol (see Giinth. Fish. 
v. p. 164), and much convergent behind. Snout much de- 
pressed, produced; the upper jaw somewhat prominent, but 
rather shorter than the postorbital portion of the head. The 
maxillary barbels extend to the root of the pectoral. The 
soft dorsal fin is as high as the body; its spine is rather slen- 
der, as long as the head without snout; granulated in front 
and serrated behind.: Pectoral spine as strong as, and rather 
shorter than, that of the dorsal fin. Caudal deeply forked, with 
the lobes subequal in length. Colour immaculate. 
A male, 11 imches long, is in the collection. 
We may add the Ceylonese names of several species seut by 
Mr. Boake :—Rallia= Etroplus maculatus; Corallia=Etroplus 
suratensis ; Loola = Ophiocephalus striatus; Connia= Ophioce- 
phalus Kelaartii ; Hoonga= Clarias Teysmanni; Kamaya= Ana- 
bas oligolepis ; Pooloota = Polyacanthus signatus; Kanaya = 
Channa orientalis. 
The Cyprinoids will be described in the seventh volume of 
the ‘ Catalogue of Fishes.’ 
