188 
ME MO IB IS OF THE QUEENSLAND MUSEUM. 
In the Australian Museum there is still preserved the foot-long specimen 
(Regd. No. B. 7028) recorded by Ogilby from the Burnett River, where Henry 
Sm it hurst obtained it in 1885. It has short labial folds, apparently inter- 
mediate in form between those of affinis and longmani and approaches the 
latter form in having the dorsal fin longer than high. A slightly larger female 
from Moreton Bay is also preserved in the Australian Museum (regd. no. 
I. 12621). 
An ascarid parasite from a Townsville Scoliodon has been described by 
Baylis (Aim. Mag. Nat. Hist. (10) viii, 1931. p. 95 and figs.). 
Mapolamia, gen. nov. 
Orthotype, CarcJiarias mdanopterus Quoy and Gaimard. 
Small sharks, rarely more than five feet in length, common inshore in 
tropical Pacific waters and easily recognised by the contrasted black tips 
to the fins. The genus may be defined as follows : — 
General form of Eulamia but with the head broad and depressed and 
not more than one-fourth of the total length. Vent slightly nearer shout 
than tip of tail. Eye small, its longitudinal diameter greater than its vertical 
diameter ; a w r ell developed nictitating membrane. Snout rounded. Nostrils 
large, nearer eye than tip of snout, and with triangular flaps. Fifth gillslit 
smallest and situated over pectoral base. Labial folds very small. Teeth 
triangular, serrated, broader in upper jaw than in lower, in one or two 
functional series, those of the upper jaw notched and serrated. Tongue broadly 
rounded. 
Body tapering. Caudal peduncle compressed, and with a slight dip 
above and below. Scales minute, forming rough shagreen. 
First dorsal large, opposite the interspace between the paired fins. 
Second dorsal well developed, and opposite anal. Pectorals falciform. Ventrals 
opposite the long interdorsal space. Upper lobe of caudal fin notched. All 
the fins conspicuously bordered with black. 
Generic definition drawn up from a male specimen, 21 inches long, from 
the Ellice Islands, Oceania. Austr. Mus. Regd. No. 1A-5523. 
This genus is typified by the C archarias m£lanopterus of Quoy and 
Gaimard (Voy. Uranie, Zool, 1824, p. 194, pi. xliii, figs. 1-2. Waigiou). These 
authors included the Squalus carckarias minor of Forskal and Squalus ustus , 
Humeri 1 as synonyms, but these are a distinct species, ustus Blainville 1816. 
Squalus malapterus Lesson (Diet. Class. Hist. Nat. v, 1829, p. 596), is the same 
as Quoy and Gaimard’s name, which is probably again a synonym or sub- 
species of Squalus Spallanzani Lesueur (Journ. Acad. Philad. ii, Nov. 1822, p. 
