47 144 Proceedings of the Royal Irish Academy. 



Also dredged in Dublin Bay ,8-12 fms.), and in Dingle Bay (20 fms. in 



gravel). 



Euchone rubrocincta (Sars). 



1865. Euchone nibroeincta. Malingren, p. 40G. 



Four specimens of this species were dredged in various parts of Ballyna- 

 kill Harbour. "Whilst preserved in formalin they retained the characteristic 

 and beautiful bands of bright red pigment, but the colour disappeared quiekly 

 when the specimens were transferred to alcohol. 



In the thoracic segments the spatulate setae have long, gradually tapering 

 tips, and more closely resemble the long capillary setae than in any other 

 species of Euchone, but the resemblance is exaggerated in the figure drawn by 

 Malingren 's artist (1805, Taf. xxix, fig. 91b, 91b'). The short capillary setae 

 at the base of the spatulate setae, which might be called the ' basal ' setae for 

 convenience, have the characteristic ' bayonet ' bend of the shaft, and are 

 distinctly winged. These ' basal ' setae furnish a useful specific character in 

 many species of Sabellidae, but have only been figured in a few cases. The 

 naked tips of the branchiae are filiform. The usual row of glands encircles 

 the body behind the setae of the second setigerous segment. There are 

 usually 31-32 setigerous segments, of which 9-11 form the anal funnel. 

 Mature specimens were found in March, April, July, and September. 

 Habitat. — Baixyxakill Harbour — Dredged on 4 occasions, in 1-8 fms. 

 Distribution. — Norway ; Skagerrak ; Gulf of Marseilles. 



Euchone rosea Langerhans. 

 PL XV., figs 33 a-k. 



13s4. Euchone rosea. Langerhans. p 271. 



Two small specimens of Euchone, dredged in 1-3 fms. in Ballynakill 

 Harbour, agree in so many respects with those described by Langerhans from 

 Madeira, that it seems advisable for the present to regard the two forms as 

 identical. The description given by Langerhans is somewhat inadequate, so 

 I have described the two Irish specimens at some length, and with figures. 

 The points in which they resemble and differ from the description of 

 Langerhans will then be noted. 



Of the two specimens found, one is a male and the other a female. They 

 are very small, the female having a total length of 4/4 mm., of which the 

 trunk is 32 mm., and the branchiae 1*2 mm. The male specimen is slightly 

 smaller. 



The body is very uniform in width, tapering slightly towards the tail. 

 The colour of the preserved specimens is a transparent brown with a slight 

 tinge of green. The ventral surface (Plate XV, fig. 33a) is almost covered by 



