| OCR Text |
Show 1883.] REV. O. P. CAMBRIDGE ON NEW SPIDERS. 355 m Palpi leg-like in the female, armed as the legs and ending with a single curved claw. Falces strong, prominent and massive, considerably gibbous at the base on the upperside, the gibbosity greatly prolonged forwards in a curved form in the male. Maxilla short broad, convex in front and prominent in an obtusely conical form at the base with only a slight subconical prominence at the extremity on the inner side. Labium short, somewhat subtriangular, its apex rounded, and its base inserted into a deep rounded indentation of the sternum, which is oval, with a round impressed spot on the margin opposite to the insertion of the basal joints cf the first three pairs of le»s Abdomen short, oval; very convex above, with a bare, subtriangular, or somewhat kidney-shaped patch on the upperside near the tore extremity. Spinners 6; an inferior transverse row of four of which the outer ones are very small; the superior pair long, upturned, and three-jointed. ° r ATYPOIDES RIVERSII, sp. n. (Plate XXXVI. fig. 2.) Adult male, length 6 lines. Cephalothorax greenish brown ; caput dark and of a reddish-brown tinge, marked on its surface with minute punctures. Legs similar in colour to.the thorax, those of the two foremost pairs being darkest; the terminal tarsal claws are three, the superior pair long and pectinated, the inferior claw small. Falces darker than the caput; they have an extraordinary appearance from the two long, projecting, curved apophyses at their base • these are cylindrical, obtusely pointed, and densely clothed at and near their extremity, above and on the sides, with long coarse bristly black hairs; the extremity of the falces in this sex (8) have no spines on the upperside. Maxilla similar in colour to the caput. Palpi long, strong, similar to the fore legs in colour; the radial joint is double the length of the cubital, of an elongate-oval or tumid form, clothed underneath with strong hairs; digital joint short, broadest and truncate at its fore extremity, where it is also clothed' with long bristly black hairs. The palpal organs are small, of a rather irregular pyriform shape, whose stem (directed backwards close by the side, rather underneath the fore part of the radial joint) is formed by a terminal sharpish-pointed spine. The abdomen is of a dull purplish-brown hue, very like that of the European Atypus piceus, Sulz., freckled with small brownish-yellow points, and a transverse kidney-shaped bare yellow-brown patch at the fore extremity of the upperside. The general surface of the abdomen is thinly covered with fine hairs. The spinners are brown ; the two terminal joints of the superior pair paler. The female resembles the male in colour, but the hinder slope of the caput is more abrupt, and the fore extremity more obtuse. Instead of the long projections of the falces, there is on each a simple strong subconical prominence directed a little backwards. |
