ANNELIDA. 121 



Fam. 9. Hesionidae. 



Genus Castalia, Savigny. 



Castalia punctata, O. F. Mttller; Mgrn. op. cit. p. 31. 



Not uncommon in deep water, and occasionally under stones 

 near low-water mark. 



Genus Psamathe, Johnst. 



Psamathe fusca, Johnst. Cat. Brit. Mus. p. 182, pi. 14 «. f. 4. 



Frequent under stones in pools and moist places between 

 tide-marks. 



Fam. 10. SyUida. 

 Genus Autolytus, Grube. 

 Autolytus prolifer, 0. F. Mttller ; Mgrn. op. cit. p. 32. 

 Not uncommon near low-water mark under stones, and 

 ranging to deep water. 



Autolytus (Procercea) pictus, Ehlers, Die Borstenwiirmer 



1. p. 256, pi. 11. f. 8-17. 

 Occasionally under stones in tide-pools. This form also 

 appears to show alternation of generations. 



Genus Eusyllis, Mgrn. 



Eusyllistubifex, Gosse(?) ; M'Intosh, Trans. Roy. Soc Edinb 

 vol. xxv. 2. p. 414. 

 Abundant on laminarian blades cast ashore by storms. 



Genus ExOGONE, (Erst. {Sphcerosyllis). 



Exogone naidina, (Erst. (?), Archiv f. Nature, xi 1845 



p. 20, Taf. 2. 

 Occasionally under stones in rock-pools. 



Genus Syllis, Savigny. 



Syllis armillaris, 0. F. Mttller; Mgrn. op. cit. p. 42. 



Frequent between tide-marks under stones, and in the 

 laminarian region. 



E 



