ANNELIDA. 
121 
Fam. 9. Hesionidse. 
Genus Castalia, Savigny. 
Castalia punctata , 0. F. Muller; Mgm. op. cit. p. 31. 
Not uncommon in deepwater, and occasionally under stones 
near low-water mark. 
Genus Psamathe, Johnst. 
Psamathe 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. Syllidse. 
Genus Autolytus, Grube. 
Autolytus prolifer , 0. F. Muller ; Mgrn. op. cit. p. 32. 
Not uncommon near low-water mark under stones, and 
ranging to deep water. 
Autolytus (Procercm) pictus , Ehlers, Die Borstenwurmer, 
i. 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. 
Eusyllis tubifex , Gosse(?); MTntosh, Trans. Roy. Soc. Edinb. 
yoI. xxv. 2. p. 414. 
Abundant on laminarian blades cast ashore by storms. 
Genus ExOGONE, (Erst. ( Sphcerosyllis ). 
naidina , (Erst. (?), Archiv f. Naturg. xi. 1845, 
p. 20, Taf. 2. 
Occasionally under stones in rock-pools. 
Genus Syllis, Savigny. 
Syllis ar miliar is j 0. F. Muller; Mgrn. op. cit. p. 42. 
Frequent between tide-marks under stones, and in the 
laminarian region. 
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