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Briti6b 1bv>^racbni^a:. 



By Charles D. Soar. Part VI. Plate XVI. 



'^r^'^.-^^ Genus VI. — Diplodontiis (Duges). 



N the present paper we propose to direct attention 

 to a genus which differs considerably from that last 

 described. 



1834. — Diplodontiis, Duges, " Remarques sur la 

 famile des Hydrachnes " in A?males des 

 Sciences. Nat., Tom. I., p. 144. 



Body soft-skinned ; legs well-supplied with swim- 

 ming hairs ; claws to all the tarsi. Epimera in four 

 groups. Palpus short and chelate. Eyes four, two 

 on the Dorsal and two on the Ventral side, near the margin of 

 body. The genital plates on each side of the genital fissure are 

 covered with numerous genital pores. 



This genus differs verylmuch from the last which we considered. 

 At present I only know of one species in England, although I 

 have taken three varieties of it in as many different localities. 

 This Hydrachnid is very common ; I have secured as many as 

 forty specimens in one day's collecting. I consider there are three 

 varieties, because, although all are identical in structure, the 

 colouring of the three varieties is distinctly different. 



Diplodontus despiciens (Mull.). 

 Bibliography. 

 1 78 1. — Hydrachna despiciens, Miiller, Hydrachnce, p. 58, Plate VI., 

 Fig. 8. 



1834. — Diplodontus filipes, Duges, " Remarques sur la famile des 

 Hydrachnes," in Annales des Sciences, p. 158, Plate X., 

 Figs. 1—4. 



i2>^j\.— Diplodontus filipes, Bruzelius, Beskr. 0. Hydrachn. som. 

 forek. i. skane., p. 44, Tab. IV., Figs. 9 — 12. 



1878. — Diplodontus filipes, Krendowsky, Die Metamorphose Hy- 

 drachnidcB, p. 8, Plate I., Figs, 3 — 4. 



International Journal of Microscopy and Natural Science. 



Third Series. Vol. VI. v 



