ANNELIDA. 121 



Fam. 9. Hesionidae. 



Genus Castalia, Savigny. 



Castalia jnmctata, 0. F. MuUer ; Mgrn. op. cit. p. 31. 



Not uncommon in deep water, and occasionally under stones 

 near low-water mark. 



Genus PSAMATHE, Johnst. 

 Psamafhe fusca, Johnst. Cat. Brit. Mus. p. 182, pi. 14 a. f. 4. 



Frequent under stones in pools and moist places between 

 tide-marks. 



Fam. 10. Syllidffi. 



Genus Autolytus, Grube. 



AutoJytus piroUfer, 0. F. Miiller ; Mgm. op. cit. p. 32. 



Not uncommon near low-water mark under stones, and 

 ranging to deep water. 



Autolytus {Procercea) pictus, Ehlers, Die Borstenwiirmer 

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



Occasionally under stones in tide-pools. This form also 

 appears to show alternation of generations. 



Genus Eustllis, Mgm. 



Eusyllis tubifex, Gosse(?) ; M'Intosh, Trans. Eoy. Soc. Edinb. 

 vol. XXV. 2. p. 414. 

 Abundant on laminarian blades cast ashore by storms. 



Genus ExOGONE, (Erst. {Sphcerosyllis). 



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

 p. 20, Taf. 2. ' 



Occasionally under stones in rock-pools. 



Genus Stllis, Savigny. 

 Syllis armiUarts, 0. F. Muller ; Mgrn. op. cit. p. 42. 

 Frequent between tide-marks under stones, and in the 



laminarian region. 



B 



