58 
MEMOIRS OF THE QUEENSLAND MUSEUM. 
marginal teeth sharp ; below the ctenoid area is a broad region covered with 
reticulations and dendriform markings, obviously consisting of modified circuli, 
and connecting at sides with the lateral circuit The canal of the lateral line 
scales has some irregular branches at its apical end. The submarginal elements 
of the ctenoid patch are much longer than broad. 
This scale is in all respects very similar to that of Abudefduf saxatilis 
(L.), from Sorocco Island, but the Glyphisodon scales can be distinguished by 
the conspicuously developed reticulated or dendriform area, the marking of 
this region in the Abudefduf being minute and labyrinthiform. Abudefduf has 
also broader scales than Glyphisodon , while those of Eupomacentrus leucostictus 
(Mull. & Trosch.) are much broader than those of Abudefduf. 
LABRIDiE. 
Choerodon venustus de Vis. Scales subquadrate, about 17 mm. long and 
15 broad; basal radii very numerous, about 36, many ending on the lateral 
margins; basal margin hardly at all scalloped; circuli (lateral and basal) 
extremely fine ; apical margin thin, not ctenoid, with numerous fine longitudinal 
radii. 
Pseudolabrus gymnogenis Gunther. Scales similar in form to those of the 
last, about 16 mm. long and 14 broad; structure also as in the Choerodon, except 
that the broad nuclear region is covered with irregular reticulations, which are 
only weakly developed in the Choerodon. 
In Choerodon, the very numerous apical radii have the appearance of 
widely spaced circuli, and with a lens appear to be actually continuous at the 
sides with the lateral circuli. The compound microscope shows that this is not 
really the case; and in Pseudolabrus the apical lines are directly continuous 
into the reticulated patch, which on the other side is continuous with the basal 
radii. The whole, therefore, belongs to the radial system. 
Eupetrichthys angustipes Ogilby. Scales parallel-sided, longer than 
broad, but not greatly so; length about 6 mm.; basal margin convex, not 
scalloped; basal radii about 25, of which about four on each side end on the 
lateral margin; apical radii well developed, no closer than the basal, and hence 
very different from those of the other two genera described above. No reticulated 
diseal area. Lateral line canal with numerous stout branches at the apical end, 
each ending in a perforation of the minutely spotted skin, and having one or 
more smaller round perforations in its course. (Compare Gunther’s figure of 
the scale of Labrichthys.) 
All these scales have the form and structure characteristic of the Labridas. 
Those of Clmrodon and Pseudolabrus are in general much like those of Iridio 
bivittaius Bloch, from Key West, Florida, and Tautogolabrus adspersus (Walb.) ;. 
