OCR Text |
Show 1875.] NEW S P E C I E S O F E R I G O N E . 197 Eugene Simon, by whom it was found on the Glacier du Casset, in the French Alps. It is allied to E. pallens (Cambr.) ; but may be easily distinguished by the much stronger and broader indentations near the summit of the caput, and the far greater distance between the fore extremity of the indentations and the eyes of the lateral pairs. ERIGONE ANTENNATA, sp. n. (Plate XXVII. fig. 7.) Adult male, length | line. The cephalothorax of this Spider is of a yellowish-brown colour, the legs, palpi, and falces rather paler, and the underparts suffused with black ; the fore part of the caput is elevated, but not very strongly; the hinder part of the elevation slopes in a rounding form ; and the point of junction of the thoracic segments is a little higher than the occipital depression; the clypeus rather exceeds in height two thirds of that of the facial space; and from near the centre of the ocular area (just above the fore central pair of eyes) springs a single strong, prominent, curved, setiform spine, whose point is directed rather abruptly downwards. The eyes are in the usual four pairs, or two transverse curved lines, on the fore part of the elevation of the caput; the interval between each of the hind central eyes and the fore lateral on its side is equal to that between each and the fore central nearest to it, and, with these two, forms as nearly as possible an equilateral triangle; the interval between those of the hind central pair rather exceeds an eye's diameter, and is much less than that which separates each of them from the hind lateral on its side; the eyes of each of the lateral and fore central pairs respectively are contiguous to each other, those of the former being very obliquely placed. The legs are rather long and slender ; their relative length appeared to be 4, 1, 2, 3 ; and they are furnished with (apparently) short fine hairs only. The palpi are rather strong and of moderate length: the cubital joint is much longer and stronger than the radial; it is bent, and its fore extremity is considerably stronger than its hinder one: the radial joint is small and very short, its fore extremity above and rather on the inner side is produced into an apophysis whose pointed extremity curves sharply round, pointing inwards and rather downwards ; from the fore part, on the upperside of the radial joint, issues a curved setiform spine of about the same length, nearly as strong as that between the eyes; its point, however, is directed up-wards: the digital joint is rather large, and, having a strong prominence both at its base and outer side, is of an irregular or somewhat roughly triangular form: the palpal organs are highly developed and very complex ; among other strong prominent corneous processes there is, near their outer extremity, a long, exceedingly slender, black, filiform, prominent, circularly curved spine. The falces are of moderate length and strength, rather directed backwards, and armed with a few sharp teeth on their inner sides towards the extremities. \ |