186 Mr. G. A. Boulenger on the 
orange above; abdomen orange, with dorsal and lateral series 
of black spots except on first segment, the ventral surface 
grey-white. Fore wing yellow, the veins finely streaked 
with black except on costal area. Hind wing pale yellow. 
2. Head and thorax deep orange; pectus, legs, and 
ventral surface of abdomen fuscous. Fore wing orange- 
brown, the costal area to beyond middle, the inner margin 
finely, and the cilia orange; a black point at lower angle of 
cell. Hind wing fuscous black; a diffused orange streak on 
median nervure; the inner margin and cilia orange; an 
orange discoidal point: the underside orange, with large 
fuscous patch on terminal area from costa to vein 2. 
Hab. MASHONALAND, Salisbury (Marshall), 2 g, 1 9 
type. Ewxp., g 36, ? 38 millim. 
XXV.—On the Presence of a Superbranchial Organ in the 
Cyprinoid Fish Hypophthalmichthys. By G. A. Bov- 
LENGER, F'.R.S. 
Since the discovery by Ehrenberg and by Riippell of the 
singular accessory branchial organ knownas the “gill-snail”’ *, 
whence the Nile fish Heterotis derives its name, more or less 
similar structures have been described in various other 
Malacopterygians and in some Ostariophysi of the family 
Characinide +. No examples of anything of the sort have yet 
been furnished by the Cyprinidze, so closely related to the 
Characinide ; but this is no doubt due to the little attention 
that has been-paid to the anatomy of the exotic genera of this 
large family. I am now able to fill up this gap in our 
knowledge by pointing out the presence of a superbranchial 
organ in the curious Chinese genus Hypophthalmichthys, 
Bleeker {, which is thus added to the list of fishes provided 
with this problematic structure. 
Although several descriptions of [Typophthalmichthys have 
been given, I do not find any allusion to the organ in question, 
which can only be seen by a removal of the membrane of 
the branchial chamber; otherwise it only appears as a thick 
protuberance on each side of the pharynx, filling up the space 
left by the gill-arches, with folds fitting between every two 
* Hyrtl, Denkschr. Ak. Wien, vill. 1854, p. 85; Hemprich & Ehren- 
berg, Symb. Phys., Zoot. pl. ix. 
+ Hyrtl, Denkschr. Ak. Wien, xxi. 1863, p.7; Sagemehl, Morphol. 
Jahrb. xii. 1887, p. 307. 
{ For a synopsis of the eight species known, ¢f. Herzenstein & Warpa- 
chovski, Trud. St. Petersb. Nat. xviii. 1887, p. 40. 
