122 MARINE FAUNA OF ST. ANDREWS. 



Genus " Ioida," Johnst. 



"Ioida macrojridhalma," Johnst. Cat. Brit. Mus. p. 197, 

 pi. 14 «. f. 5. 



Occasionally between tide-marks. This is the sexual bud 

 i »f a SyUis. Four or five of the segments anteriorly are devoid 

 of the long bristles. 



Fam. 11. Nereidaj. 

 Genus Nereis, L. 

 Nereis pelagica, L. ; Mgrn. op. cit. p. 47. 

 Everywhere abundant from high-water mark to the coralline 

 ground, and in the stomachs of many fishes. 



Nereis cuUrifera, Grube ; Ehlers, Die Borstenwiirmer, 

 ii. p. 4(31, pis. 18-20. 



Frequent between tide-marks under stone3 on muddy 

 ground, and in the stomachs of various fishes. 



Nereis Dumerilii, Aud. & M.-Ed. ; Ehlers, op. cit. \>. 535. 

 It is curious that only the epitocous form (olim Iphinereis 

 fimcola) has yet occurred, viz. in the coralline region and on 

 the West Sands after storms. 



Genus IIediste, Mgrn. 

 Uediste dioersicokir, O. F. Miiller ; Mgrn. op. cit. p. 49. 

 Occasionally between tide-marks, and after storms on the 

 West Sands. 



Genus Eunereis, Mgrn. 



Eunereis hngissima, Johnst. ; Mgrn. "p. cit. p. 57. 



Occasionally cast ashore on the West Sands alter storms. 



This is an epitocous form, the relations of which are at present 



in obscurity ; there is no known species with which it may be 



connected except those mentioned here. 



