Holt and Calderwood — Report on the Rarer Fishes. 447 



distance between the origin of the pelvis and the anal, and rather less than 

 one-fourth of the total length (without caudal). The eye longer than the snout 

 by one-third the length of the head, and nearly twice the width of the inter- 

 orbital space. Snout obtuse, with an undulated series of pores in the pre-orbital 

 region, running towards the extremity of the snout. Barbel about half the 

 length of the eye. Angle of the gape opposite or a little in front of the 

 centre of the eye. Caudal peduncle very slender, its height being about two- 

 fifths of the distance between the dorsal and the caudal, or a little more than 

 one-fourth of the length of the eye. Fifteen or sixteen longitudinal series of 

 scales between the first dorsal and the lateral line. The first long dorsal ray 

 compressed, moderately strong, extending back beyond the centre, frequently to 

 the posterior fourth, of the second dorsal fin. Of the second dorsal and anal, the 

 outline of the latter is especially incurved in its central region. Caudal rounded, 

 its external rays extending some distance along the peduncle. Pectoral, as long 

 as the head without the snout. Pelvic, with the two outer rays elongated and 

 filamentous, equal to the length of the pectoral, and united along their proximal 

 half. 



Colour. — Brownish or dull silvery grey, darkest on the dorsum ; fins dark 

 grey, those of the median series nearly black on the marginal parts.* Cavities 

 of the mouth, gills, and abdomen, black. 



Sise. — Not known to exceed a total length of 13 inches. 



The species has been excellently described and figured by its discoverer ; 

 and our own description, which differs in no important respect from that given 

 by Dr. Gtinther, is inserted only in accordance with the plan of the present 

 Paper. 



The larger specimen, shown in fig. 2, has the long dorsal ray broken, the 

 slender extremity representing apparently a growth which has taken place 

 subsequently to the original injury. The figure is taken from the preserved 

 condition, which accounts for the shrunken appearance of the skin over the 

 muscous cavities of the head. 



The smaller specimen (fig. 1), has the first ray complete, but extending only 

 to about the centre of the second dorsal fin. The barbel is not shown, being 

 turned back in the gular groove. Apart from the mere obvious developmental 

 differences, it will be noted that the anus, in the larger, is comparatively more 

 remote from the anal fin than in the smaller example. A similar condition is 

 shown in the specimen figured by Gtinther {op. cit., pi. xviii., fig. B). This 

 decrease of measurement between the anus and the pelvic fins may probably 



* According to Giinther {loc. cit.), "specimens of a much lighter colour (probably albinos) are not 

 scarce." 



