olO SUMMARY OF CURRENT RESEARCHES RELATING TO 



perceive odours is distributed over the -whole integument of the spider, 

 and that there is no definitely localised olfactory organ. 



Eggs of Tardigrada.* — F. Richters summarises the known facts 

 regarding the eggs of Tardigrada. They are laid either free or within a 

 membrane. Nothing is known of the marine genera Echiniscoides and 

 Lydella. All eggs laid in membranes have a smooth shell ; those free 

 have very differently formed apparatus for fixation, whose function is 

 to prevent the eggs being washed out by the rain from the mossy turf in 

 which they develop. The membrane enclosing the smooth eggs bears 

 numerous claws which effect the same purpose. In a second paper \ a 

 description of a new species, Echiniscus conifer, is given. 



Marine Pseudoscorpion from the Isle of Man.} — A. D. Imms 

 reports the occurrence of Obisimn [maritimum Leach among the rocks 

 between the limits of high and low tides at Port Erin. It was found in 

 the recesses of the rock fissures along with adults of the marine Collem- 

 bolon Anurida maritime/,, larva?, pupas, and imagines of the Coleop- 

 teron Micralymna brevipenne, and a species of Acarus. It is probable 

 that the pseudo-scorpion preys upon the Collembola, and most likely 

 upon the Acari also. When alarmed or irritated, it ran about actively 

 in both a forward and backward direction with outstretched pedipalps, 

 but it was not seen to run sideways, as some pseudoscorpions do. 



When submerged, twice every twenty-four hours, it probably relies 

 upon the store of air within its tracheal system. In the living condition 

 this species is easily recognised by the olive-greenish colour of the body, 

 contrasted with the bright red-brown of the pedipalps. Pickard Cam- 

 bridge has obtained the same form from the Devonshire coast and 

 from Jersey ; it does not appear to be known on the Continent. This 

 is the second recorded occurrence in the British Isles since the time of 

 Leach. 



Pentanymphon Antarcticum.§ — T. V. Hodgson describes this new 

 type found by the ' Discovery,' and also by the ' Scotia.' The body is 

 smooth, very slender, with lateral processes widely separated ; there are 

 five pairs of ambulatory appendages ; the mandibles are well-developed, 

 2-jointed, and chelate ; the palps are 5-jointed ; the ovigerous legs are 

 10-jointed, terminating in a claw, the last four joints with a single row 

 of denticulate spines. The only feature of importance which separates 

 it from the genus Nymphon is the presence of a fifth pair of legs. 



Ten-legged Pycnogonids.|| — Leon J. Cole calls attention to the 

 description which Eights IF gave in 1837 of a Pycnogonid (Decolopoda 

 australis) with a fifth pair of walking legs from the South Shetland 

 Islands. C. V. Hodgson has found several specimens in the ' Scotia ' 

 collection from the South Orkneys, along with a single specimen of 

 Pentanymphon antarcticum which he described from the ' Discovery ' 

 collection. In Decolopoda, as Cole points out, we have the most primi- 



* Ber. Senck. Nat. Ges. (1904) pp. 59-70 (2 pis.). f Tom. cit., pp. 73-4. 



X Ann. Nat. Hist., xv., (1905) pp. 231-2. 



§ Op. cit., xiv. (1904) pp. 458-62 (1 pi. and 1 fig.). 



fl Op. cit, xv. (1905) pp. 405-15. 



«I Boston Journ. Nat. Hist., i. (1837) pp. 203-6 (1 pi.). 



