152 Dr. W. C. M'Intosh on the 



Monocelis rutilans, O. F. Miiller, Zool. Danic. iii. p. 49, 

 tab. 109. f. 10 & 11. 



Occasionally in the laminarian region. 



Order Nemertinea. 



Suborder ENOPLA. 

 Proboscis furnished with stylets. 



Earn. 1. Amphiporidae. 



Subfamily Ampsiporinm. 

 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 (0. F. Midler), Johnst. Op. cit. p. 158, 



pi. 1. f. 3. 



Frequent in the coralline ground in crevices of shells. A 

 very large, though fragmentary, specimen appears to be this 

 species. It was found on the West Sands after a severe storm 

 in March. The proboscis 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. 



