40 MEMOIRS OF THE QUEENSLAND MUSEUM. 



all around, except that the extreme margin, especially at sides of apex, is hyaline 

 and without sculpture ; basal circuli conspicuously denser than apical or lateral. 



These scales do not differ materially from those of G. hippos. 



STROM ATEID^E (including NOMEID.E). 



Psenes whiteleggii Waite. Queensland. Scales very variable, the largest 

 scarcely 1| mm. broad, broader than long ; but others, probably from the caudal 

 region, smaller, and longer than broad; margin simple; three or fewer basal 

 radii ; basal margin variably but usually strongly lobed ; circuli normal, widely 

 spaced. 



Gobiomorus gronovii has scales of the same general type, but without 

 radii. The scales of Poronotus triacanthus are much larger than those of Psenes, 

 but otherwise very similar, though with much denser circuli. The lateral circuli 

 are often distinctly angular, and the same feature may be seen in some scales of 

 Psenes. 



PEMPHERID^E. 



Pempheris compressus Shaw. Port Jackson. Scales (from different 

 parts of the fish, presumably) differ greatly in size, the largest are nearly 4£ 

 mm. broad and fully 3^ long; a strong arched ridge runs across the scale just 

 above the nucleus, separating the larger apical field, which is without circuli or 

 other distinct sculpture, except the marginal ctenoid area ; marginal teeth long 

 and sharp, on all the scales examined; submarginal ctenoid elements broader 

 than long; sides of apical field variably constricted (concave) just above the 

 ends of the transverse ridge ; part of scale below the ridge covered with normal 

 circuli; basal radii many, but feeble, being folds rather than true radii, arranged 

 in a fan-like manner (except in latinucleate scales) ; basal margin of larger 

 scales straight, weakly crenulate, but some of the smaller scales have three lobes, 

 the median one very large, separated from the others by deep sinuses. 



Parapriacanthus elongatus McCulloch. Bass Straits. Scales about 

 3 mm. broad and 2 long; divided into two parts more or less as in Pempheris 

 compressus, but wholly cycloid, or with the apical margin thrown into one or 

 two broad dentiform prominences, without any cycloid patch ; transverse ridge 

 straighter and weaker than in P. compressus ; apical half of scale without circuli, 

 basal half Avith strong normal circuli; at the beginning of the basal half the 

 scale suddenly widens, making an angle with the vertical sides of the apical 

 half ; no distinct basal radii or lobes, but there are very indistinct traces of 

 radial folds. 



These scales are very remarkable ; those of P. compressus are quite unlike 

 those of the species of Pempheris previously seen (Mem. Queensl. Mus., Dec. 

 1913, p. 54) . In the presence of a distinct ctenoid patch, P. compressus resembles 

 Leptobrama millleri, but the submarginal elements in that fish are very different, 



