108 ZOOLOGY OF THE VOYAGE OF THE BEAGLE. 
forming a longitudinal fascia, purple ; the rest of those fins, as well as the caudal and ventrals, 
pale or nearly colourless. 
Habitat, Tahiti. 
This species was taken by Mr. Darwin at Tahiti. It so nearly answers to 
the description of the S. globiceps of Valenciennes, brought by MM. Garnot and 
Lesson from the same locality, that I cannot suppose it to be distinct. This spe- 
cimen, however, appears to have more spinous teeth at the corners of the mouth. 
3. Scarus LEPIDUS. Jen. 
S. fuscus, capite et pinnis purpureo-ceruleo tinctis: fronte parum elevato, eque ac rostro 
continue et gradatim proclivi; hoc apice obtuso: maxillis exterius levibus, mar- 
ginibus vix crenatis ; canino ad angulum oris im maxilla inferiore unico, in superiore 
nuclo: lined laterali distincté ramosé : pectoralibus subtriangulis : caudali subequal, 
radiis externis mediis vix longioribus. 
Dr O02 Ay 3i9G Ca l3iece.s PP. 93 /29V 1/5: 
Lona. unc. 8. lin. 7. 
Form.—General form not very dissimilar to that of the last species, but the crown and nape less 
elevated, whence the profile falls in a more gradual slope: snout, nevertheless, blunt at the 
extremity. Depth of the body very nearly one-third of the entire length. Head about one- 
fourth of the same. The height of the head is about four-fifths of its own length. Jaws smooth 
externally, the true teeth appearing like minute scales on their surface, the cutting edges 
scarcely at all crenated: only one laterally projecting canine at each corner of the lower jaw, 
none in the upper. Diameter of the eye one-sixth of the head. 
Dorsal not quite so low as in the last species; its height in the middle of its length about 
one-seventh of the depth. Caudal nearly even, the upper and lower rays being scarcely 
longer than the others. Pectorals and ventrals similar, but the scale between the latter shorter 
and more rounded. Scales on the body large, the free portions finely striated and granulated, 
with a broad membranaceous border: three large ones at the base of the caudal, as in the last 
species. Lateral line distinctly branched, the ramifications irregular and varying on each 
scale; in some instances only one long stem extending nearly to the margin of the scale, with 
one or more lateral twigs; in others, two, three, or even four distinct stems, either simple or 
ramified. 
Cotour.—(In spirits.) Of a nearly uniform dark brown, with some faint traces of purplish blue 
about the head and fins, which possibly may have pervaded some parts of the body also in the 
recent state. 
Habitat, Tahiti. 
This species was taken with the last, and notwithstanding it presents two or 
three obvious differences in respect of form, as well as of colour, it is just possible 
it may be the same in a younger state. I think it not improbable that the points 
of the caudal may elongate with age, the forehead become more gibbous, and the 
