ANNELIDA. 109 



Order Nemertinea. 



Suborder ENOPLA. 

 Proboscis furnished with stylets. 



Fam. 1. Amphiporidae. 



Subfamily Amphiposin^. 

 Proboscis proportionally large. 



Genus 1. Amphiporus, Ehrenberg. 



Amphiporus lactifloreus, Johnst. M'Intosh, Brit. Annel. 

 (Ray Society), i. p. 156, pi. 1. f. 1 & 2. 



Common under stones between tide-marks. 



Amphiporus pulcher (O. F. Miiller), Johnst. Op. cit. p. 158, 



pi. 1. f. 3. 



Frequent in the coralline ground in crevices of shells. A 

 verv large, though fragmentary, specimen appears to be this 

 species (Plate IV. fig. 3). It was found by its artist on 

 the West Sands after a severe storm in March. The pro- 

 boscis is extruded, and the tip of the snout forms a kind 

 of button, which, however, may be due to the condition of 

 the parts ; the oesophageal region protrudes as a rugose disk 

 on the ventral surface near the tip. A reddish line along 

 the body is peculiar, and is probably the nerve-cord, since 

 no vivid colouring has been seen in the vessels of ordinary 

 specimens. The dull greyish coloration of the body is also 

 peculiar, and may be partly owing to the brownish-red ova 

 shining through the, other tissues, or to alimentary material. 

 The posterior end of the specimen shows the pinkish elements 

 of the digestive chamber and ova. 



Genus 2. Tetrastemma, Ehrenberg. 

 Tetrastemma melanocephala, Johnst. Op. cit. p. 165, pi. 2. f. 1 . 

 Not rare amongst the roots of seaweeds on stones near low- 

 water mark. 



