Arwidsson — O71 some Irish Maldanidae. 217 



appearance of the eighth setigerous segment, the division of the anal cirri into 

 long undivided ones, and short ones lobate at the point, and the prolonged 

 anal papilla. 



The nephridial pore is somewhat under the rows of ixncini, and in a line 

 with or slightly in front of these. The neck of the developed uucini is a 

 little striated in an oblique fashion. 



Caesieirrus neglectus n. sp. 

 (Plate XVII, figs. 1-9; Plate XVIIL, figs. 10-12; Plate XIX., figs. 20-26.) 

 " Axiothea catenata Malmgren," Cunningham and Eamage (1, p. 679, fig. 42). 

 Specific Diagnosis. — The anterior point of the head rather short. The 

 borders of the head are low, almost with faintly indicated lateral notches ; the 

 hinder notch between the borders is also faint. Ocelli numerous, in front 

 of the mouth. The parapodia of the seventh setigerous segment situated 

 somewhat in front of the posterior third. Nineteen setigerous segments and 

 three posterior achaetous segments. Of long anal cirri there are three pairs, 

 besides the ventral cirrus ; the short anal cirri are found in each interval to the 

 number of from one to foui-. Xephridia in setigerous segments 7-9. Anterior 

 glandular bands are found on the first seven setigerous segments ; on the fourth 

 setigerous segment this band occupies the half of the section behind the 

 parapodia ; tlie posterior portion of the seventh setigerous segment is 

 completely, though somewhat sparsely, covered with glands on its upper 

 portion. The second setigerous segment has, on the whole, glands very much 

 scattered, chiefly in the front of the parapocUa ; and the third is thuily covered 

 with glands, for the most part all over it. The eighth setigerous segment 

 possesses a somewhat distinct glandular band between the middle and the 

 parapodia. From the middle of the seventh setigerous segment the glandular 

 bands follow the ventral nerve-cord, being most strongly marked on the ninth 

 to the fourteenth setigerous segments. More or less faint longitudinal glandular 

 bands are found to the front and to the back of the uppermost unciui in the 

 direction of the neighbouring capillary setae from the eighth to the twelfth (or 

 thirteenth) setigerous segments inclusive (especially in the larger individuals). 

 The uncini on the first three setigerous segments have a rather long inner 

 section, and three or four teeth. The fully developed uncini have six teeth 

 as a maximum. The anterior capillary setae are especially numerous on the 

 eighth and the ninth setigerous segments ; in a great many of the posterior 

 capillary setae on the middle and posterior segments the bases of the points 

 are more or less distinctly enlarged. 



Colour. — As I have seen no living individuals, the accounts of Cunningham 

 and Eamage (cf. 1) may appropriately be repeated here : " Colour pinkish, paler 



B.I.A. PROC, VOL. XX[S., SECT. B. [2 fl] 



