. Fig. 42. Amphiporus scoresbyi, Sketch of a preserved speci- men, x 8 approx. Fig. 43. Amphiporus scoresbyi, Section, slightly oblique, across the brain region, ac, lateral branch of the anterior caecum; bm, basement layer; cm, circular muscle layer; co, cerebral organ; ep, epithelium. A. marioni and other species. The proboscis is stout. It has twelve nerves and the accessory armature consists of two reservoirs each with two or three stylets. The main stylet could not be seen. Two lateral branches of the anterior caecum extend forward and end above the brain (Fig. 43). The excret
. Fig. 42. Amphiporus scoresbyi, Sketch of a preserved speci- men, x 8 approx. Fig. 43. Amphiporus scoresbyi, Section, slightly oblique, across the brain region, ac, lateral branch of the anterior caecum; bm, basement layer; cm, circular muscle layer; co, cerebral organ; ep, epithelium. A. marioni and other species. The proboscis is stout. It has twelve nerves and the accessory armature consists of two reservoirs each with two or three stylets. The main stylet could not be seen. Two lateral branches of the anterior caecum extend forward and end above the brain (Fig. 43). The excretory tubules, as usual, lie between the cerebral organs and the branches of the anterior caecum. The efferent duct is continued back above the lateral nerve and opens laterally much nearer the tail than the head. The brain is of fair size, both ganglia being nearly equal. The cerebral organs open by a fine canal laterally and run in towards the brain obliquely back. The organs wedge themselves between the ganglia and protrude posteriorly beyond the dorsal ganglia with which they have nervous connections. The lateral nerves are not much flattened in the body. They join above the anus. The sex of the sectioned specimen could not be determined. Amphiporus spinosus, Burger, 1893 (Plate XVI, fig. 22; Figs. 44, 45). A. spinosissimus, Burger, 1893; A. cruciatus, Burger, 1893; A. multihastatus, Joubin, 1914. This species could nearly always be found in kelp roots. Three types were originally described under N 3, N 16, N 20, the different sizes, number of eyespots, colour and
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