38 
MEMOIMS OF TEE QVEEFiSLANB MUSEUM. 
complete this report. The following key separates the Clupeoid scales now 
described : — 
No radii; ax:)ical margin entire 
Eadii present 
Basal field ■\Yitli vertical radii 
Basal field without vertical radii 
2. Apical field with distinct transverse or Y-like radii 
Apical field without such radii 
3. Transverse radii, excex^t the uppermost regularly interrupted 
Transverse radii not or rarely interrupted 
4. Transverse radii 3 or 4, rarely fewer 
Transverse radii more numerous . . 
5. Apical margin coarsely creniilate , . 
Apical margin not crenulate 
6. Apical margin with long strap-like teeth 
Apical margin w'itliout teeth 
Chirocentrus dorab. 
. 1 . 
. 2 . 
, 3. 
. Engraulis aiitipodum. 
Fotamalosa 'tiovcediollandice. 
in middle . . 
Amhlygaster neopilchardus. 
4. 
5. 
6 . 
Stolepliorus robustus. 
Earengula castelnaui. 
Sardinella moluccensis. 
Borosoma come. 
ATHERINID^. 
Rhadinocentrus ornatus Began. Queensland; Moreton Bay. Scales 
transversely oval or oblong, about 2^ mm. broad and l-J- long; completely 
cycloid; corners rounded, the laterobasal slightly angular; circuli fine, all 
round scale; basal radii numerous (about 12). Tlie scales resemble those of 
the Pceeiliidiu. Those studied are latinucleate, with a large sculptureless 
nuclear field. 
Rhombatractus fitzroiensis Castelnau. Queensland; Brisbane, fresh 
water. Scales about 2| mm. broad and 1| long; completely cycloid; latero- 
basal corners rectangular; nuclear region a short distance above the middle; 
about ten basal radii ; circuli fine and regular, except in the apical field, where 
they are mainly broken into small pustuliform markings ; slight suggestions of 
apjical radii on some scales. 
R. maccullochi Ogilby. Queensland. Seales almost exactly as in the 
other species, excej^t that the circuli are practically absent in the apical field, 
not represented by imstuliform markings. 
These scales resemble those of Menidia msnidia, except that they are much 
smaller, the laterobasal angles are more distinct, and the lateral circuli are much 
denser. 
MUGILIDiE. 
Mugil cephalus dobula Giinther. Queensland. Scales subquadrate,, 
about 10 mm. broad and 11 long; basal radii about 8 to 12, subparallel, not 
crowded about middle of scale; laterobasal corners evident; ctenoid area very 
well developed, the elements contiguous throughout; region above the nucleus 
covered with fine labyrinthiform markings. The basal circuli are extremely 
fine and dense; much more so than in M, mirema. The shape of the scales is 
entirely different from that of il/. curema. 
