Mr. J. IJlackwall on newli/ discovered species o/Arancidea. 133 



iicath at its greatly enlarged extremity; tiie radial joint is 

 dilated, convex al)ove, and nineh larger than the cubital joint ; 

 the digital joint is long, enlarged and convex at its base, parti- 

 cularly towards the inner side, and ta|)ers to its extremity, near 

 which there is a prominent, pointed, black process on the outer 

 side; the palpal organs are connected with the inferior surface 

 of the enlarged base of this joint, towards the inner side; they 

 are moderately develoj)ed, not very complex in structure, sub- 

 globose, with a strong terminal |)rocess, which is crescent-shaped 

 at its extremity, and are of a pale ycHow-brown colour, that of 

 the extremity of the terminal process being dark reddish-bi'own. 

 The abdomen is somewhat cylindrical, sparingly clothed with 

 short hairs, and of a dark brown colour faintly tinged with olive- 

 green, the sides of the under part being the palest : it is marked 

 with numerous dull yellow spots; and a short, dark red-brown, 

 fusiform band, having a small angular point on each side, near 

 the middle, occurs in the medial line of the anterior regicm of 

 the upper part : on each side of the posterior extremity, above 

 the spinners, there is a short, oblique, slightly curved, black 

 line : a broad black band, tinged with reddish-brown at its ex- 

 tremities, extends along the middle of the under part, and the 

 branchial opercula are of a pale dull yellow colour; the part 

 comprised between them is protuberant, and in connexion with 

 the posterior extremity of the protuberance a small, prominent, 

 semicircular, yellowish-white process is situated. 



This Pholcus, which was comprised in the collection of Algerian 

 spiders received from Messrs. Gray and Clark, resembles the 

 Pholcus impressus of M. Koch in several particulars, but is quite 

 distinct from that species. 



Pholcus pallidus. 



Length of the female /^ths of an inch ; length of the cephalo- 

 thorax j^; ; breadth y'^ ; breadth of the abdomen J^ ; length 

 of an anterior leg 1^ ; length of a leg of the third pair ^^. 



The legs are very long, slender, provided with fine hairs, with- 

 out spines, and arc of a yellowish-brown colour ; a brown annulus 

 occurs near the whitish extremity of the femora and tibiae, and 

 the genual joint has a brown hue ; the first pan* is the longest, 

 then the fourth, and the third pair is the shortest ; each tarsus 

 is terminated by three claws; the two superior ones are curved 

 and pectinated, and the inferior one is intlected near its base. 

 The eephalo-thorax is circular, glossy, somewhat convex, and has 

 a large indentation in the medial line ; the anterior part, on 

 which the eves are seated, is prominent, and the space between 



Ann. &; Mag. N. Hist. Ser. 3. VuL i. 28 



