| OCR Text |
Show 432 REV. O. P. CAMBRIDGE ON N E W ARANEIDEA. [May 16, THWAITESIA? DIVERSA, sp. n. (Plate XXXI. fig. 8.) Adult female, length 2 lines. This Spider differs in some respects from the type of the genus, but whether sufficiently so to justify the formation of another genus for it appears to he uncertain as yet. The normal indentations of the cephalothorax are less strong, and the eyes of the posterior row are equidistant from each other, and the height of the clypeus is equal to half that of the facial space ; the legs also are shorter and rather stronger, and are furnished with hairs only, but these are strong and of a bristly and even somewhat spinous nature. The maxillae are very similar to those of the type ; but the labium is distinctly hollowed at the apex. The cephalothorax, falces, maxillae, and labium are of a brightish orange-yellow brown hue; and the sternum is of the same colour, with a dusky patch near its fore extremity. The legs are of a paler yellow hue; the fore extremities of the femora and tibiae, with the genual joints and (more faintly) a portion near the middle of the femora and tibiae of the first and second pairs, are red-brown, giving the legs an annulated appearance. The abdomen is large, and has its posterior extremity produced into a strong but not very long hump. When looked at in profile,the distance from the spinners to the apex of the hump is rather less than that from the spinners to the fore extremity (on the upperside) of the abdomen. It is thinly clothed with hairs, and is of a pale dull luteous yellowish-brown colour. The posterior extremity of the hump is black ; and in other parts along the middle, at the back and on the sides, there are blackish stripes, patches, and markings; one also underneath (between the spinners and the genital aperture) appears to contain a transverse slit, probably the opening into a portion of the breathing-apparatus ; if this should prove to be so (of which I could not satisfy myself sufficiently), it would probably be a good reason for its separation into another genus. The genital aperture is nearly round, not large, but placed on a transverse oval area and surrounded outside again with a strong corneous-looking rim. The spinners are short and compact. A single example in M r . Traill's Amazon collection. Subfamily Phoroncidina. OGULNIUS, g. n. (nom. propr.). Cephalothorax abbreviated behind ; caput rather raised and produced, the ocular area including the whole of its anterior extremity; clypeus low, considerably less than half that of the facial space. Eyes unequal in size, the four centrals largest, and forming a large trapezoid whose anterior side is much the shortest; the lateral pairs are placed obliquely on small tubercles, and the eyes of each are contiguous to each other on either side. Legs projecting laterally from the sternum, moderately strong, |
