110 
MARINE FAUNA OF ST. ANDREWS. 
Tetrastemma Candida , 0. F. Muller. Op. cit. p. 167, 
pi. 2. f. 2 & 3. 
Abundant amongst seaweeds on stones in the same localities. 
Tetrastemma vermicula, 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. Op. 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 Nemertinjs. 
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 , (Erst. Op. cit. p. 178, pi. 3. f. 6, 
& pi. 7. f. 6. 
Common in the same localities, in fissures of the rocks be¬ 
tween 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. 
