1887.] FISHES FROM MUSCAT. 6C5 



AnACANTH INI. 



Pleuronectid^. 



137. PsETTODES ERUMEi, Bl. Schn. 



138. PsEUDORHOMBUs RussELLii, Gray. 



139. Pardachirus marmoratus, Lacep, 



Physostomi. 

 Silurid.«. 



140. Plotostjs anguillaris, Bl. 



141. ArIUS THALASSINUS, Riipp. 



The single specimen, although 2i feet long, has all the characters 

 of Riippell's A. thalassinus, thus invalidating the statement, first 

 made by Bleeker, that age alone accounts for the differences between 

 this species and A. nasutus, C. & V. The smallest specimen of the 

 latter form preserved in the British Museum measures a little over 

 1 foot, and the largest 3 feet ; yet there is no great difference 

 between them. Besides the produced and pointed snout, they differ 

 from A. thalassinus in the shorter maxillary barbel and the presence 

 of granulations on the snout. It may be that the differences between 

 the two forms are sexual ; but the material at hand does not enable 

 me to decide. The only adult specimen in spirit in the British 

 Museum is a male, and belongs to A. nasutus. 



ScOPELID^. 



142. Saurus varius, Lacep. 



143. Saurida tumbil, Bl. 



CyPRINIDjE. 



*144. Scaphiodon muscatensis, sp. n. 



D. ^^. A. |. L. lat. 38-39. L. tr.' ^. 



Length of head one fourth of total (without caudal) ; diameter of 

 eye one fourth the length of head ; snout rounded, projecting a little 

 beyond the mouth, glandular ; a single barbel on each side, 

 measuring three fifths the diameter of the eye ; mandible sharp, 

 with a horny sheath. Origin of dorsal just above the ventrals, 

 midway between the end of the snout and the base of the caudal ; 

 last undivided dorsal ray osseous, rather feeble, not serrated. 

 Pectoral as long as the head less the snout. Caudal forked. Bronzy 

 above, whitish below ; scales, except the lowermost, with a dark 

 brown margin ; a more or less distinct blackish lateral band en<ling 

 in a spot before the caudal. 



Total length 4 inches 3 lines. 



Several specimens. 



' Counted between origin of dorsal and ventral. 



