152 
one in which nearly the whole of the tail had been lost. Though im- 
perfect, some details not previously published may be gleaned from 
an examination of the specimen—a female. 
Disc broader than long, widest at the first third of its length, anterior 
edge very obtuse, tip of snout scarcely indicated. Body entirely 
smooth. 
Nostrils very large, widely separated, the width of the nasal fold 
nearly thrice its depth; lower lip papillose. Three processes behind 
the lower teeth, the median one being advanced. Two membranous 
flaps behind the upper teeth, extending along their entire width, the 
anterior one fimbriate, the other fleshy. 
Each tooth with a shallow transverse groove; there are twenty- 
five series in each jaw, arranged quincuncially. 
Colour.—Slaty-grey above, front margin of disc narrowly bordered 
with white and a dark zone within. An irregular series of white 
spots along each side, between the mid-line and the margin§, in the 
thoracic region, and two white spots on each side in the lumbar region. 
White beneath, the area near the margins of the disc mottled with 
pink; minute black spots in the space between the mouth and gill- 
openings. 
Length of disc, 800 mm. ; width, 780 mm. 
The type of the species, also a female, is described as being smooth 
with a small oval tubercle in the centre of the back. There is no 
cutaneous expansion above the tail, a feature characteristic of the 
subgenus Hemitrygon. 
Of the three examples obtained, one was taken off Table Cape, 
north of Hawke Bay, in 42 fathoms; the other two in the Bay of 
Plenty, in 34-55 fathoms. The stomachs contained crustaceans 
which Dr. Chilton has identified as Lysvosquilla. 
My uiopatis, Duméril, 1817. 
Myliobatis tenuicaudatus Hector. 
HAGLE-RAY. 
Plate XXIII. 
Myliobatis tenwicaudatus Hector, Trans. N.Z. Inst., ix, 1877, p. 468, 
pl ax. 
Aetobatus tenuicaudatus Gill, Mem. Nat. Acad. Sci., vi, 1893, p. 1. 
Stations 86, 87, 91, 92, 94,.95, 96. 
Body smooth. 
Width of disc more than one and a half times its length, posterior 
angles acutely pointed. Eye 6°3, and interorbital space 1°3, in the 
length of the head. Spiracle twice the diameter of the eye. Nostrils 
close together, separated by a thick columnar frenum ; nasal fold long 
and rectangular, its hinder border concave and papillose, widest at its 
free margin, where it is twice its length. Teeth in pavement-like 
