•554 SUMMARY OF CURRENT RESEARCHES RELATING TO 



New Uropodinae.* — E. Trouessart discusses the family Uropodiuae, 

 and describes (1) four new species of Uropoda, (2) Uropoda (Glyphoj.sis) 

 riccardiana, as a representative of the sub-genus Glyphopsis Berlese, 

 and (3) three new species of Discopoma. 



New British Hydrachnid.f — C. D. Soar describes Ecpolus papil- 

 lo8us sp. n., an unrecorded Hydraclmid found in Britain. The speci- 

 men (a female) was discovered by Taveruer in the New River. Its 

 nearest relative seems to be Koenike's Ecpolus tuberatus, described and 

 figured in his Hydrachnidae of Madagascar and Nossi Be. J Koenike 

 reports that the animal is new to him, but thinks that it belongs to the 

 genus Ecpolus. 



Arrangement of a Spider Collection^ — Fr. Dahl utilises three 

 methods : — (a) preservation of the entire animals in alcohol, &c. ; (&) ex- 

 hibition of dried specimens ; and (V) permanent preparations of the 

 important diagnostic parts. The paper includes many practical hints 

 of value to museum workers. 



Classification of Spiders.|| — Fr. Dahl discusses the value of the 

 cribellum and calamistrum in the classification of spiders, and takes a 

 systematic survey of the Zoropsidae in particular. The new genus 

 Calamistrula is described. 



e. Crustacea. 



Ephippia of the Lynceid Entomostraca.lf — D. J. Scourfield has 

 made a detailed study of many of these, and submits a number of 

 general conclusions. 



The ephippium is usually composed of a large portion of the original 

 shell, in the majority about three-fourths, and in Alona tenuicaudis the 

 whole. The dorsal margin of the ephippium is always specially 

 strengthened by a more or less copious deposit of chitin. The anterior 

 margin is formed by the ordinary line of junction between the head- 

 shield and the valves. 



The line of separation between the ventral portions of the valves 

 to be detached and the ephippium is traced out, at least anteriorly, 

 before the ephippium is thrown off, and it appears to be always due to 

 the special formation of a row or rows of easily separated pieces of 

 chitin, of variable but usually minute size. 



The chitin of the valves of the ephippium is always more or less 

 darkened and probably thickened, but it is not usually much modified, 

 except that the ordinary shell sculpture becomes at times intensified, 

 and a minutely pitted structure is often developed. Between the outer 

 valves of the ephippium and the egg there are always certain membranes 

 or pieces of tissue, probably forming in most cases a perfectly closed 

 inner envelope for the egg. The ephippium contains but one resting 

 egg, except in the genus Eurycercus, where numerous eggs occur, and 

 in Weismann's case of Camptocercus macrurus, which has sometimes, but 

 not always, two eggs. 



* Bull. Soc. Zool. France, xxvii. (1902) pp. 29-45 (3 figs.). 



t Journ. Quekett Mior. Club, 1902, pp. 251-2 (1 pi. 1 ). 



j Abb. Senckenberg Nat Ges., xxi. p. 308 figs. 73-9. 



§ SB. Gcs. Nat. Freunde Berlin, 1901, pp. 1-8. 



|| Tom. cit., pp. 177-99 ((J figs.). 



f Journ. Quekett Micr. Club, 1902, pp. 217-44 (3 pis.). 





