428 G. WYKHOFF. 



Beaumont, that their arrangement in A. lact'ifloreus is very similar to 

 that in A. dissimulans (1895, p. 360). In fact, I have not been able to 

 see the slightest difference between them ; in both species the cephalic 

 furrows are arranged as described by Beaumont. 



All distinguishing characters given by Eiches between A. lactijlorcus 

 and A. dissiniulans fail. The varieties as described by him and by 

 Beaumont certainly exist, but they are connected by a series of varia- 

 tions of their characters, which makes it very probable that they 

 themselves are to be looked upon as varieties of one single species, in 

 this case AmpM'porus lactijlorcus. 



3. Amphiporus allucens {Biirg.). (Bilrger. Monogr. PI. IV, Fig. 35). 



Locality: One specimen from the Mewstone Ledge (10-15 fathoms) 

 and one from the Eame-Eddystone Grounds. 



The specimens recorded by me under this name fully resemble 

 A. pulcher var. allucens, Bilrger. Colour bright salmon, as in A.jpulchcr 

 described by Beaumont ; the head is more yellow, with the central 

 nervous system showing through as a pale pink-coloured spot. Head 

 not separated from the body. The eyes are large and black and were 

 arranged in a double continuous row on each side of the head. The 

 last eye of the shorter row is larger and lies just in front of the 

 brain. The cephalic grooves join ventrally in front of the brain. The 

 absence of secondary cephalic grooves and of a reserve central stylet 

 decided me to separate this species from A. imlchcr, Biirgcr. As to its 

 relations to A. jju.lcher, Mcintosh, the number and arrangement of the 

 eyes, the shape of the head and the wdiole habitus of the worm are so 

 different, that it seems impossible to confuse them. 



Geographical distribution : Naples. 



11. Fam. drepanophoeidae. 

 Genus Drepanophorus. 



Broad and ventrally flattened worms of some centimetres length. 

 Intestinal diverticula not bifurcated; the oesophageal diverticulum 

 sends pouches in the direction of the brain. Gonads alternating 

 regularly with the intestinal diverticula. Numerous eyes. Cerebral 

 organs at the sides of or posterior to the brain. Proboscis sheath with 

 metamerically arranged lateral pouches. Proboscis with many central 

 stylets, situated on one crescent-shaped handle. 



1. Drepanophorus spectabilis (Quatr.). (Burger. Monogr., Taf. Ill, 

 Figs. 28 and 28a.) 



Locality: Queen's and New Grounds (5-6 fath.) and Mewstone 

 Ledge (10-15 fath.). 



