KUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 52. N:0 3. 13 
Hydrophis kingii Bier. — 1 specimen from Broome, and 3 specimens from 
Cape Jaubert, July 1911. 
Distira mjöbergi n. sp. — One male specimen from Cape Jaubert. Head rather 
small and neck slender, its height contained fully three times in the height of the 
compressed body. Rostral considerably broader than deep; nasals shorter than the 
frontal, about twice as long as the suture between the praefrontals; frontal 1'/, as 
long as broad, as long as its distance from the rostral, shorter than parietals. One 
pre- and two postoculars. A single anterior temporal, which is narrow on one side, 
on the other fused with the large 6th upper labial. Six upper labials, the third 
and fourth entering the eye. Two pairs of chin-shields in contact, the posterior 
longer. 30 scales round the neck, 45 round the body. Scales subimbricate on the 
neck and lower parts of the sides, on the upper parts more or less hexagonal and 
juxtaposed. Each scale is provided with one or sometimes with two tubercles; in 
the latter case the tubercles sometimes fuse so as to form a longish keel. On the 
anterior neck and the tail the tubercles are almost obsolete. Ventrals 276, bicari- 
nate. Head uniformly olive brown, neck of the same colour but with narrow and 
faint light crossbands; body otherwise olive grey above, with scattered wbhitish 
scales which appear to be the remains of light cross-bands which formerly have 
enclosed dark saddle patches; sides of body yellowish white (in spirit), slightly mar- 
morated or dotted with olive grey. Total length 100 cm. 
Distira stokesii Grar. — 3 specimens from Cape Jaubert. 
Distira major SHaw. — 3 specimens from Cape Jaubert. 
Aipysurus l&evis LacÉr. — 4 entire specimens and several skins from Cape 
Jaubert. 
Aipysurus tenuis n. sp. — Three specimens from Cape Jaubert, July 1911. 
General appearance resembling that of Aipysurus levis Lac. but very much 
more slender, especially with regard to the anterior parts. Diameter of eye about 
equal to its distance from the mouth. Head with distinct shields above; frontal in 
all specimens partly divided, parietals more or less divided, supraocular divided into 
two distinct shields; rostral much broader than deep; frontal longer than broad. One 
pre- and two postoculars. 7 or 8 upper labials, often horizontally divided in an 
upper and a lower portion, especially is this the case with the anterior ones, and 
usually also with the sixth under the eye; fourth, fifth and sixth, or third, 
fourth and fifth labial entering the eye. A pair of small chin-shields in contact. 
Scales in 19 rows, smooth, imbricate. In the male the scales of the 3 to 5 lower rows 
are provided with a small tubercle and some few scattered prickles. Ventrals, especially 
the posterior mesially keeled, 187—192, in the male provided with a transverse, 
irregular series of larger, and scattered smaller prickles which decrease in size posteri- 
orly. Head rather dark brown above, paler below. On the back every scale is 
