47 70 Proceedings of the Royal Irish Academy. 



ventral cirrus. This is the typical arrangement for the sub-genus Carobia of 

 the genus Phyllodoee, as denned by de Saint-Joseph (1888, p. 273), and 

 differs from the genus Genetyllis as understood by Mcintosh, which has two 

 pairs of cirri on the buccal segment, and two pairs with setae on the second 

 segment. Moreover, Mcintosh says that his specimen of G. hiberwica has a 

 bluish tint on the dorsum, and has both surfaces iridescent, which agrees 

 exactly with some specimens of P. rubiginosa which have been kept for some 

 time in spirit. There is considerable variation in colour, even in the deeply 

 pigmented specimens of P. ruMginosa, and the colour changes greatly when 

 they are preserved. 



Habitat. — Blacksod Bay — Found on the shore on 9 occasions. Dredged 

 on two occasions, in 1-8 ims. Clew Bay — Dredged on 5 

 occasions, in 9-27 fms. Ballynakill Harbour — Dredged 

 on two occasions, in -t-8 fms. 

 Distribution. — British Isles (coast of Galway, Plymouth) ; France. 



Phyllodoee Lizziae (Mcintosh). 



1908. Mydides Lizziae. Mcintosh, p. 110. 



The genus Mystides is characterized by the presence of three pairs of 

 tentacular cirri. In his description of this species Mcintosh says : — "Three 

 tentacular cirri occur on each side (on the first, second, and third segments)." 

 The figure of the head, however (pi. lviii, fig. 11), shows four pairs of 

 tentacular cirri. A specimen from Berehaven, now in the Irish National 

 Museum, was referred by Mcintosh to this species, and quite distinctly it shows 

 four pairs of cirri. The individual from Ballynakill Harbour agrees exactly 

 with the one from Berehaven, and with Mcintosh's figures, and has four pairs 

 of cirri. I can only conclude that Mcintosh made an error in observation, 

 which was corrected by his artist. The species seems to be a typical repre- 

 sentative of the genus Phyllodoee, agreeing with the sub-genus Carobia in 

 the distribution of its tentacular cirri, of which one pair is on the first seg- 

 ment, two pairs with a spine and several setae on the second segment, and 

 one pair with a small setigerous lobe and normal ventral cirrus on the third 

 segment. The buccal segment forms a prominent collar round the posterior 

 margin of the head, interrupted in the median dorsal region by the posterior 

 portion of the head, which in this region bears a small median tentacle. 

 The Berehaven specimen is 62 mm. long, with 135 segments; the one from 

 Ballynakill is 24 mm. long, with 85 segments. Both specimens have 

 regenerated tails, and the smaller one has a pair of slender cylindrical 

 anal cirri. The dorsum and feet are marked with purple pigment, and 

 there is a patch of the same pigment at the base of each foot on the 



