Annelida of St. Andrews. 153 



Tetrastemma Candida, O. F. Mliller. Op. cit. p. 167, 

 pi. 2. f. 2 & 3. 

 Abundant amongst seaweeds on stones in the same localities. 



Tetrastemma vermicida, De Quatrefages. Op. cit. p. 169, 



pi. 3. f. 3. 

 Common amongst the roots of seaweeds on stones between 

 tide-marks. 



Tetrastemma flavida, Ehrenberg. Op. cit. p. 170, pi. 4. f. 1. 

 Not uncommon in the same situations. 



Tetrastemma dorsalis, Abildgaard. 0/). cit. p. 172, pi. 1. f. 4? 

 & pi. 3. f. 4. 

 In swarms on Ceramium and other seaweeds in the lami- 

 narian region, and occasionally under stones near low-water 

 mark. 



Subfamily Nemebtinje. 

 Proboscis proportionally small. 



Genus 4. Nemertes, Cuvier. 

 Nemertes gracilis, Johnst. Op. cit. p. 176, pi. 2. f. 5. 

 Frequent under tangle-roots at low water, and occasionally 

 under stones between tide-marks. 



Nemertes Neesii, CErst. Op. cit. p. 178, pi. 3. f. 6, 

 &pl. 7. f. 6. 

 Common in the same localities, in fissures of the rocks be- 

 between tide-marks, and often from deep water. 



Nemertes carcinophila, Kolliker. Op. cit. p. 180, pi. 1. f. 5. 

 Very frequent on the abdominal hairs of female Carcini. 



Genus 5. Lineus, Sowerby. 

 Lineus marinus, Montagu. Op. cit. p. 181, pi. 9. 

 Common between tide-marks and in deep water. 



Lineus gesserensis, O. F. Mliller. Op. cit. p. 185, pi. 4. f. 2, 

 & pi. 5. f. 1. 

 Abundant between tide-marks. Green and red varieties 

 are equally common. 



