322 
TWO NEW GENERA AND SPECIES OF FISHES. 
tion of the posterior third of the opercle and the greater part of 
the subopercle, the scales on the latter being arranged in a 
narrow basal band on its upper half, from the extremities of 
which short, broad bands are produced backwards; below this 
there is a free angular band; scales of body similar to those of 
the head, but strongly ctenoid; eighteen enlarged tubular scales on 
the lateral line, with from six to eight normal scales in the space 
between each pair; between each tubular scale and the base of 
the dorsal there is a naked band about two normal scales in width, 
which is continued across the lateral line to the depth of two 
scales; sides of abdomen and base of the anal fin with more or 
less corresponding naked fascne. Upper surface of head and body 
olive-green, lower surface pale yellowish-white, the two colours 
being abruptly divided; a series of seven olive-green spots along 
the middle of the sides, the last encircling an enlarged tubular 
scale at the base of the caudal; fins immaculate. 
The unique specimen from which the above diagnosis has been 
drawn up was washed ashore, in a perfect though dying condition, 
at Maroubra Bay, near Sydney, and was shortly afterwards lent 
to me by its discoverer, Mr. Thomas Whitelegge, for identification 
and, if necessary, description. In length the type specimen 
measures 78 millimetres, and it has since been added to the 
collection of the Australian Museum, Sydney, its register number 
being I. 3396. 
Atherinidje. 
Tropidostethus, gen.nov. 
Branchiostegals six; pseudobranchife present. Body strongly 
compressed, rhombo-fusiform, the tail attenuated; dorsal profile 
straight, ventral convex and acute. Cleft of mouth oblique, 
extending to beneath the front margin of the eyes; jaws not 
protractile. A single series of teeth in the jaws and a short 
curved row on the palatine bones; no vomerine or lingual teeth. 
Spinous dorsal small; anal moderate; ventrals minute, situated 
far behind the pectorals. Scales of moderate size, thin, cycloid, 
daciduous. 
