ITai.bkkt — The Aran'na of the Seashore. Ho 



iiyiiipli, except for the double indenUlions of the front inari;iii, characteristic 

 of the encysted stage. The structure of the adult can be seen llimuL^li ibc 

 enclosing skin. 



Originally recorded from Sicily (Palermo) by Uerlese. Figures i.f llic 

 crista and thoracic tubercle are given in tiie present paper. 



Rhyncholophus Passerinii (Berl). (PI. XXIII, fig. 29 a, b.) 



1904 Erythmeus Passerinii Berlese, 8, p. 16. 



Found between rather dry Hakes in the Pelvetia zone on the rocky shore 

 at Malahide, June and July, 191G. Also at Ardfry, in the Pelvetia zone, 

 Tinder stones resting on mud, June, 1916. 



A sluggish species, of a dark purplish-red colour, and dense, silvery 

 hairs. It may be easily recognized by the very elongate shape (fig. 29 a), 

 and the strongly plumose hairs. The legs and palps are short, and lather 

 weakly developed. The size varies in the Irish specimens from about 1160/u 

 to i;3U0;u ; breadth 560^. The median rod of the crista is rather long, and 

 a chitinous part projects beyond the hinder sensory area (fig. 29 b). lii the 

 original figure (8, PI. L tig. 17) of this species there are only three hairs on 

 the frontaT sensory area; possibly the drawing was made from an immature 

 specimen ; in the fully developed form about ten long " featliered " hairs are 

 present. Recorded from the Italian coast by Berlese, and found under roek.s 

 sometimes covered by the tide. 



Rhyncholophus rubripes Berl. et Trouess. (Pi. XXllI, fig. 30.) 



1889 11. miiicutus var. rubri2}es Berlese et Trouessart 20. 1889 Moniez 38, 

 p. 196. 1910 Ritteria hirsuta George, " The Nat.," p. 182. 1915 Halljert 

 25, p. 115. 1918 Hull S6, p. 26. 



An abundant and conspicuous species on the intertidal shore at Malahide 

 and Ardfry, occurring in fissures and running on the rocks at low tides. 

 Apparently it was noted only in the Orange Lichen and Pelvetia zones, but 

 there is little doubt that it occurs also in tire lower zones. A short descrip- 

 tion of this species was given in (25), and the crista is figured in the present 

 paper (fig. 30). 



Rhyncholophus tardus Halbt. (PI. XXIII, fig. ."1.) 



1915 Llalbert 25, p. 116. 



Found under stones on the seashore near Mulranny, Co. Mayo, 

 September. 



A species of an orange-yellow colour and long oval shape (length, 1638/i • 

 breadth, 844/i). Body witli a sparse covering of rod-like haiis, whicli are 



