NEW AND RARE SPIDERS. 87 



is long and stronger than the rest. The digital joint is of the 

 usual form, long, rather narrow, being produced into a long point ; 

 it is equal in length to the radial and cubital joints together. The 

 palpal organs have a strong prominent pointed corneous process near 

 the middle, and a long prominent circularly-curved tapering filiform- 

 pointed spine is connected with them. 



This spider, which is certainly new to Great Britain and Ireland, 

 is, I think, new to science. It is nearly allied to T. nervosa Sim., 

 and T. larva Id., from the Eastern Pyrenees, but on a careful 

 comparison with the descriptions of those species I believe it to be 

 distinct. From our other British and Irish species it may easily 

 be distinguished ; from T. Derlmmi (which it resembles nearly 

 in size) by the form of tho radial prominence and apophysis, 

 and from T. atrica C. L. Koch and T. Guyonii Guer. by its 

 small size, unicolorous legs, and the structure of the palpi. From 

 T. campestris it may be distinguished by the smaller size of this 

 latter species, its more distinct abdominal pattern and annulated 

 legs, as well as by the much larger digital joints of the palpi. 



A single adult male was kindly sent to me by Mr. G. H. 

 Carpenter, of the Museum of Science and Art, Dublin, by whom it 

 was found among loose stones in an old wall at Glendalough, 

 Ireland, in September, 1889. 



GENUS : ARGYRONETA (Latr.) 

 ARGYRONETA AQUATICA. 



Argyroneta aquatica Clk. Camb. Spid. Dors., p. 471. 



On April 28th, 1890, C. 0. P. Cambridge met with this spider 

 in abundance among water weeds while dredging for shells in the 

 Stoborough Meadows, near Wareham. Subsequently, September, 

 1890, it was also found at Oak o'mire Pond, Bloxworth Heath. 

 This is its first record as a Dorset Spider. 



In the description " Spid. Dors." I.e. supra it was omitted to 

 mention that on the underside of the abdomen, a little way in 

 front of the spinners, is a transverse slit or opening leading to a 

 spiracular organ. Whether this is or is not of importance for 

 the purpose of classification appears as yet to be uncertain. 



