RECORDS OF W.A. MUSEUM. 
[87 
between the two species that may not possibly be accounted for by 
variation with growth, etc. Both my specimens, however, have 
the fourth dorsal rays longest, so that the fins are angular in form 
instead of rounded. Minute palatine teeth are present in both, but 
are very indistinct and easily overlooked in one of them. As sug- 
gested by Jordan and Thompson, it will be necessary to compare 
specimens of both species before the characters separating the two 
can be positively determined. 
Both specimens were obtained near Fremantle, W. Australia. 
SILLAGO BOSTOCKII, Castelnau. 
Plate X., Fig. i. 
Sillago ciliata vel bostockii, Castelnau — Proc. Zool. Soc. Viet., II., 1873, p. 133. 
Sillago bostockii, McCulloch — “ Endeavour Report,” fishes (in press), pp. 60, 63. 
D. XL, 21-22; A. 19-22; P. 15-16; V. 1 ., 5; C. 17; 1 . lat. 
69-74 i 6+14. 
Head 3^-3!, depth 5-5^ in the length to the hypural. Eye 
5-51, snout 2f, pectoral if-if in the head. Interorbital width f-f 
the eye. 
Body elongate, compressed, the dorsal profile rather more 
arched than the ventral. Caudal peduncle much compressed, its 
depth almost equal to the postorbital portion of the head. Eye 
large, nearer the end of the operculum than the tip of the snout. 
Interorbital space flat. Preoperculum crenulate, a broad flat spine 
on the operculum. Mouth small, oblique, the maxillary a little 
longer than half the snout. Nostrils close together, near the eye, 
the anterior with a skinny lobe. A broad band of villiform teeth 
on each jaw, the outer ones of the upper jaw somewhat enlarged ; 
a broad horseshoe shaped band on the vomer. Gill-rakers short 
and thick, tubercular below, nine on the lower limb of the first arch. 
Scales finely ctenoid, extending forward to the nostrils on the 
upper surface of the head ; arranged in four rows on the cheeks. 
Snout and lower part of the head bare. Basal portion of the caudal 
fin densely scaly, while rows of small scales are present behind 
each ray of the other fins. Lateral line a little arched anteriorly, 
thence straight to the caudal peduncle, and continued on to the fin 
to the end of the middle rays. 
