Halrert — The Acarmaofthe Seashore. 129 



A, — Marginal plates absent from the dorsum. First pair of legs without 

 ambulacra and claws. Male genital foramen opposite fourth pair of legs. 

 Size, about 690/u x 460,< (PI. XXII, ^l,^. 11). 



1. Phaiilocyliiha iUtoralis (Trouess.). 



B. — Marginal plates present. First pair of legs with ambulacra and 

 claws. Male foramen opposite third pair of legs. 



Ends of marginal plates not joined ; their extremities removed some 

 distance from the posterior margin of the dorsal shield. Form broadly ovate, 

 with a few short marginal hairs. Metapodial line distinct. Size variable; 

 averaging about 950/i x 720/i (PI. XXII, fig. 12). 



2. Phaulodinychus repletus Berlese. 



Marginal plates more uniformly broad, and united by a narrow 



chitinous band behind the dorsal shield. Body margins with numerous 



strongly curved hairs. Metapodial line obsolete. Size about 690/( x 460/( 



(PI. XXII, fig. 13). 



y. Phaulodinychus orchestiidarum (Barrois). 



Ends of marginal plates not joined, reaching, or almost reaching, the 

 posterior margin of the dorsal shield. All plates strongly and regularly 

 punctured. A row of T-shaped hairs on side margins of body. Size smaller, 

 about 614^ X 440;u (PI. XXII, fig. 14). 



4. Trachyuropoda minor (Halbt.). 



Phaulocylliba littoralis (Trouess). (PI. XXIF, fig. 11.) 



1889 Urojioda orchestiidarum (partim) Berl. et Trouess. 20, p. 125. 1902 

 Discopoma littoralc Trouessart 52, p. 41. 1915 PhaulocijlUha. Bcrlesii 

 Halbert 25, p. 86. 1917 Berlese 19, p. 11. 1918 Berlese "Eedia" 

 xiii, p. 190. 



Both sexes were found between damp limestone flakes in the Pelvetia 

 and Spiralis zones on the rocky shore at Malahide, May and June. At 

 Ardfry the male and nymphs occurred under boulders resting on gravel and 

 shells in the Vesiculosus and Serratus zones, June. In these localities it 

 seems the rarest of the four intertidal species of Uropodidae. The first 

 recorded British specimens were found under stones in llowth Harbour in 

 November, 1913. The ventral surface of the male is figured (fig. 11). 



Phaulodinychus repletus Berl. (PI. XXII, fig. 12 a, b.) 

 1903 Berlese 7b, p. 269. 1915 Habiropoda iiiienttpta Halbert 25, p. 88 



1916 Berlese 17, p. 136. 1917 Berlese 19, p. 11. 1918 Hull 26, p. 50. 



An abundant species in estuaries and salt marshes, and also on the ojien 



seashore under stones and decaying seaweeds, usually in ihe Orange Lichen 



