774 REV. O. p. CAMBRIDGK ON NKW ARANEIDEA. [June 21, 



Eijes considerably unequal in size ; the four smallest form a 

 slightly curved transverse line a little way above the falces ; in con- 

 tinuation of the curve, at each end of the line, is a much larger eye, 

 with another beyond it, behind, and lower down, seated on a strong 

 tubercular prominence. The eight eyes may thus be said to form 

 only one long transverse sinuous line, a position very unusual, and, in 

 fact, almost (so far as I know) unique among the eight-eyed Spiders, 

 approaching, however, somewhat near to that of Selennps, Dup. 



Legs rather short, laterigrade, not very strong, but tapermg, not 

 very unequal in length, (so far as I could ascertain) 1, 2, 4, 3 — 1, 2 

 and 4 being very nearly equal, and 3 being not much shorter. They 

 are furnished with hairs and also with long spines beneath the tibiae 

 and metatarsi, arranged in two (parallel) rows, and terminate with 

 three tarsal claws, the two superior ones curved and pectinated, the 

 inferior one very small and most strongly curved. 



Palpi moderately long, and terminating with a curved pectinated 

 claw. 



Falces short, conical, strong, and vertical, 



Ma.vill(P. moderate in length and strength ; enlarged and rather di- 

 vergent at their extremities, where they are rounded on the outer sides. 



Labium somewhat oblong, (apparently) a little rounded at the 

 apex, and about half the length of the maxillse. 



Sternum small, oval, pointed at its posterior extremity. 



Abdomen short-oval, fitting well up to the base of the cephalo- 

 thorax. Spinners small, two-jointed. The anal tubercle is apparently 

 two-jointed, and follows several rather conspicuously marked trans- 

 verse folds in the epidermis, denoting no doubt obsolete segments of 

 the abdomen. 



Perissoblemma thomisiforme, sp. n. (Plate LXVI. fig. 6.) 



Length of an immature female, 1^ line. 



The cephalothorax, falces, maxitlcB, labhim, and sternum are 

 darkish dull brown, slightly tinged with yellow, and with traces of 

 a paler iU-defined longitudinal central band. The legs and palpi are 

 yellow, and the abdomen a little paler than the cephalothorax, with 

 a short, narrow, central, longitudinal stripe of a darker hue on the 

 fore part. 



The two central eyes of the long row in which the eight are dis- 

 posed are larger than the one next to each, and are further from 

 each other than each is from the next one to it ; the eyes seated 

 on each of the large tubercles at the extremities of the row are 

 rather smaller than that next to each. 



A. single example was contained in the Amazons collection sent to 

 me by Prof Traill. 



It is impossible to conjecture what size the adult form of this 

 remarkable Spider may attain. Had it not been for the possession 

 of three terminal tarsal claws, I should have concluded it to belong 

 to the Thomisidae. It seems to me impossible to include it in 

 any at present recognized family. Wherever, however, it may be 

 eventually placed, the genus is a very distinct one. 



