122 
MARINE FAUNA OF ST. ANDREWS. 
Genus u Ioida,” Johnst. 
u Ioida macrophthalma ,” Johnst. Cat. Brit. Mus. p. 197, 
pi. 14 a. f. 5. 
Occasionally between tide-marks. This is the sexual bud 
of a Syllis. Four or five of the segments anteriorly are devoid 
of the long bristles. 
Fam. 11. Nereidse. 
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 cultrifera , Grube ; Ehlers, Die Borstenwiirmer, 
ii. p. 461, pis. 18-20. 
Frequent between tide-marks under stones on muddy 
ground, and in the stomachs of various fishes. 
Nereis Dumerilii ) Aud. & M.-Ed.; Ehlers, op. cit. p. 535. 
It is curious that only the epitocous form (olim Iphinereis 
fucicola) has yet occurred, viz. in the coralline region and on 
the West Sands after storms. 
Genus HedisTe, Mgrn. 
Hediste diversicolor , O. F. Muller; Mgrn. op. cit. p. 49. 
Occasionally between tide-marks, and after storms on the 
West Sands. 
Genus Eunereis, Mgrn. 
Eunereis longissima , Johnst. ; Mgrn. op. cit. p. 57. 
Occasionally cast ashore on the West Sands after 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. 
