The _Scuta_, consist of yellowish, transparent, horny, laminated chitine, without any calcareous matter; externally covered by the common integument of the capitulum; these valves are placed very near to each other, close under the orifice, and therefore high up on the capitulum; the membrane between them is smooth and unwrinkled; they are formed of two rather acuminated lobes, joining each other at above a right angle; one lobe (the longer one) stretching nearly transversely across the capitulum, the other running down parallel to its rostral margin: in shape and position they resemble the scuta of _Conchoderma aurita_; and if another lobe had been developed it would have run along the orifice, and then these valves would have resembled the scuta of _Conchoderma virgata_. In a specimen with a capitulum 2/10ths of an inch long, the scuta from point to point were 1/20th of an inch in length. _Peduncle_, much wrinkled, about one third in diameter of the capitulum, and shorter than it; at the base it is generally expanded into two or three finger-like projections. _Length_ of the largest specimen, about one fourth of an inch. _Colour_, according to A. Costa in the work above cited, “rufo-flava vittatâ;” but after spirits the whole becomes uniformly yellowish. _Filamentary Appendages_, situated beneath the basal articulation of the first cirrus, on the posterior edge of the usual enlargement; acuminated, about two thirds of the length of the shorter ramus of the first cirrus. _Prosoma_ well developed. _Mouth._--On each side there are two slight prominences; one under the mandibles, the other transverse nearer to the adductor muscle. _Labrum_, placed near the adductor muscle, with the upper part not more bullate than the lower part; crest with a row of blunt teeth, and many fine bristles growing chiefly outside the teeth; there are many fine bristles on the inner or supra-oesophageal fold of the labrum. _Palpi_ not nearly touching each other, pointing towards the adductor: much hollowed out on their inner sides, hence narrow and acuminated, with doubly serrated bristles. _Mandibles_, with three teeth and the inferior angle ending in a single sharp spine; whole inferior portion narrow; first tooth as far from the second, as the latter from the inferior angle; owing to the presence of short thick spines projecting from the sides of the jaw, the lower edges of the second and third teeth appear pectinated. _Maxillæ_, nearly two thirds of the width of the mandibles; beneath the three larger upper spines there is a considerable notch, and the whole lower part is very slightly upraised; edge irregular, with obscure traces of either two projections, or perhaps of four steps. _Outer Maxillæ_, with bristles in front continuous; exteriorly there is a slight prominence near each olfactory orifice, with a tuft of long bristles.