Clare Island Sitrvpy — Archiannelida and Polychaeta. 47 95 



are placed behind the dorsal bundle of setae ((ig. 22n). The capillary setae 

 are very slender, without wings; and in the male specimen the longer ventral 

 setae are longitudinally striated. On the ventral side of the dorsal bundle 

 there are 1-3 short setae with lyrate tips (fig. 22 o). One arm is longer than 

 the other, and has a row of spines on its inner margin. This type of seta 

 makes its appearance in the fourth segment, and continues to the end of the 

 body. It has not been found in any other species of this family. The setae 

 in each bundle are arranged in two rows, and the lyrate setae are at the 

 lower end of the front row. In the 4th foot (fig. 22 d) the dorsal setae are 

 slightly longer than the ventral setae. In the 50th foot (fig. 22k), the ventral 

 setae are three times as long as the dorsal. In the male specimen the setae 

 in the upper part of the ventral bundle are longer and thicker than the rest, 

 and are longitudinally striated. The setae in the females do not show this 

 distinction. In the 80th foot (fig. 22 f) the difference in length between the 

 setae in the dorsal and ventral bundles is not so marked. 



In the female specimens the eggs commence in the 26th segment, and 



there are usually four in each segment. They are red in colour. The absence 



of appendages on the head is characteristic of the genus Paraonis, Grube. 



The sub-genus Paraonides was created recently by Cerruti (1S09, p. 503) to 



contain a species Paraonis (Paraonides) neapolitana Cerruti, distinguished 



by the presence of modified setae in the posterior dorsal bundles. In this 



sub-genus the present species must be placed, owing to the presence of 



the lyrate setae in the dorsal bundles. This type of seta has not hitherto 



been found in any species of the family Paraonidae, and its occurrence adds 



an additional proof of the close relationship of this family to the Ariciidae. 



Habitat. — Ballynakill Haebouk — Mature male taken in the surface 



tow-net at midnight. This species was also found in Galway 



Bay, and in Dingle Bay. 



Family SPIONIDAE. 

 Spio martinensis Mesnil. 



1896. Spio martinensis. Mesnil, p. 122. 



This species is very closely allied to S. filicornis Fabr., but as regards 

 those characters in which the two species are said by Mesnil to differ, such 

 as the shape of the head, feet, and setae, the Irish specimens agree with 

 S. martinensis. According to Mcintosh (1909, p. 162), the capillar} 7 setae 

 of S. filicornis are striated but not dotted, whereas the Irish specimens have 

 setae exactly like those figured by Mesnil for S. martinensis. I have not yet 

 found the true S. filicornis in Ireland. The first crochets appear in the 



