20 Proceedinrjs of the Royal Irish Academy. 



organs, wliieh aro liiglily developed, sub-globose, glossy, with, a long,, 

 slender, moderately curved process at their extremity, whose pointed 

 termination is slightly recurved, and are of a dark-broAvn colour. The 

 abdomen is subcylinchieal, rather broader at the anterior than at the 

 posterior extremity, which is rounded, and projects a little beyond the 

 spinners ; a broad, irregular, oliVe-brown band extends along the- 

 middle of the upper part, and comprises some pale-yellow spots, six, 

 which are minute, being disposed in pairs immediately above the- 

 spinners ; a pale-yellow band curves round the anterior extremity, 

 and passes, with some interruptions, along each side of the medial 

 band ; the sides are of an olive-brown colour, marked with in-egular- 

 spots and streaks of a yellow hue, and a brown olive-brown baud, 

 bounded laterally by a white line, extends along the middle of the 

 under part ; the colour of the branchial opercula is dark-broA^ii. 



It will be perceived that I have felt some hesitation in announcing 

 this ]N"ephila, which seems to be unknown to arachnologists, as the 

 male of iV. ]}lumi2)es, to which it appears to approximate more nearly 

 than to any other species that I am aec[uaintecl with. 



[I have carefully compared the example from which ^Ir. Black- 

 wall's description is made with several ujidoubted examples of the 

 male of N. phimipes received from the Brazils, and can iind no specific 

 difference whatever. This sex is described and figured (the figure is 

 very imperfect) by Dr. B. S. Wilder, in the "Proceedings of the 

 Boston Society of IS'atural History" for October, 1865.] 



Genus TetkagjS'AXHA, Latr. 



Teteagxatha 3IIXAX, u. sp. Plate 2, fig.l4. 



Length of the male (not including the falces), -t% of an inch ; 

 length of a f alx, i ; length of the cephalothorax, 1 ; breadth, iV ; 

 breadth of the abdomen, iV ; length of an anterior leg, 1^ ; length of 

 a leg of the third pair, f. 



The eyes are seated on black spots, and are disposed on the ante- 

 rior part of the cephalothorax in two transverse, nearly parallel 

 rows ; the four intermediate ones describe a square, the anterior ones, 

 which are placed on a small protuberance, being the largest, and the 

 anterior eye of each lateral pair the smallest of the eight. The ceph- 

 alothorax is long, moderately convex, glossy, compressed before, 

 rounded in front, slightly so on the sides, has an indentation in the- 

 medial line of the posterior region, and is sparingly supplied with 

 short pale hairs ; the falces are very long and prominent, widely 

 divergent, naiTower at the base than at the extremity, and armed 

 with a long, slightly curved, reddish-bi'own fang, a curved, pointed 

 process directed forwards near the extremity of the upper part, 

 towards the inner side, and a row of teeth on each side of the groove 

 occupied by the fang when in a state of repose ; the superior row 

 comprises twelve teeth, the anterior one being the largest, and the 



