PROFESSOR E. P. WRIGHT ON THE TEREDIDÆ. 565 
traverses its posterior extremity, running from the junction of the posterior wing above 
to the point of the fang; anterior to this the fang is grooved parallel to the anterior 
edge; while posterior to it the grooves take the direction of the inferior edge of the wing, 
and become gradually more and more recurved towards the points, and are continued on 
to the ridge. The posterior dorsal wing is very small and lunate, not rising above the 
beaks, gently arched, scarcely projecting beyond the posterior margin of the fang; its 
lower margin would correspond with the lower margin of the anterior area if continued ; 
the superior margin is rough and strong, forming a broad area defined by a sharp- 
erested ridge, and emarginated at the junction of the wing. Hinge-tubereles large, 
with a hook-shaped process from each, by which the valves are interlocked; the wing 
is formed by a sharp shell-like ridge, and is smooth and slightly excavated. The cavity 
‚of the beak is filled with a spongy calcareous matter, from which issues the delicate 
and flattened subumbonal process, which presents its flat side to the valve, and at about 
one-third of its length forms a decided elbow backwards. 
Length from before backwards # inch, from above downwards a little less. 
Palettes very large and long, stilt-shaped; the style long and subulate, slightly flexu- 
ous, bony, surrounded by a broad dilatation or step; concave on one side, convex on 
the other, its upper surface deeply excavated ; on this is placed the blade, which is three- 
fourths as long as the style, thin, linear, obliquely truncated at the tips, about one-third 
the width of the slit. 
Length of style 47, of blade ;% inch. Brought by the Rev. F. Mason and Rev. J. 
Benjamin from Tavoy. : 
The animal is 10 inches long ; the siphonal tubes are of nearly equal diameter, and are 
united nearly to their tips, they reach to a little beyond the dilated portions of the pa- 
lettes. In a dried specimen of palettes received from Mr. H. Adams from Singapore, 
and which I refer to this species, this same peculiarity is observable. 
KupPrus? manyin, spec. nov. (Plate LXV. figs. 1-8.) 
Valves.—Rather large in proportion to the animal ; the so-called “ marrón sii 
is large, quadrilateral; the fang-like body is large and hollowed out ; er ho : sm = 
is seulptured, the sculpture consisting of a series of transverse ANRT er ; on 
on their convex surfaces. The “central portion " is very large, broader t " mo ^u 
à strongly marked concave depression running from the apex to the an - rer 
two-thirds of its cutting-surface the sculpture is the same as — : = Fe 5 
4re3;" on the remaining portion the sculpture is indistinct. The = kr 
at all developed. The subumbonal blade is broad and curved. There 1 3 
plate. Extreme length of valve inch, breadth $ inch. a: 
Palettes.—The stalk is about } of an inch in length, and of the thie 
E. irregular outline. It expands 
Ph; it is thin and semitransparent, Mns and of rather e * gro pinum 
into a broad blade-like portion, which is 4 inch €— rface is hollowed out, and 
ie stalk expands into a breadth of + inch. Truppe and convex on the outer 
indistinctly divided into two portions; it is flat on — 
Portion ; it is solid and of a dark-brown colour. 
