SPECIES OF MARINE PLANARIANS. 95 



border of pure white. Thickly studded with papillae, small and conical, the bases of 



which are black, the apices golden yellow, and the intermediate band white. 

 Tinder surface pale purple, very dark towards the margin all round, but having the 



narrow white border as above. 

 Head furnished with two small rudimentary tentacles. Mouth situated between the 



middle and anterior third. 



Eound at Aripo, 28th February. 



Fig. 13 : a, upper surface of animal ; b, papillae, magnified. 



i 

 Genus Acanthozoon, Coll., n. g. (see p. 86). 



14. Acanthozoon armatum, Kel. 



Length 1§ inch ; breadth 1^ inch. 

 Upper surface of a dark purple colour, covered with short black spines. 

 Under surface pale purple, smooth. 

 Tentacles folded, but somewhat distinctly formed. 

 Fig. 14. Upper surface. 



15. Acanthozoon papilio, Kel. 



Length about 1 inch. 

 Upper surface yellow, covered with small black spines; margin whitish. 

 Under surface pale yellow. 

 Tentacles as in last species, black, tipped with white. 



Looks very like a butterfly moving in the water. 

 Fig. 15. Upper surface. 



Genus Etjeylepta, Hemp, et Ehr. 



16. Eurylepta fusca, Kel. 

 Length 1^ inch. 

 Upper surface dusky brown. 

 Under surface paler brown. 

 Tentacles inconspicuous and approximated. 

 Fig. 16. Upper surface. 



17. Eurylepta atraviridis, Kel. 



Upper surface dark mottled green, with a darker broad streak through the whole median 



line. An edging of pale green runs all round. 

 Tentacles like the latst. 

 Fig. 17. Upper surface. 



18. Eurylepta undulata, Kel. 

 Length 2 inches. 



Upper surface pale yellow, with undulating lines and spots of purplish brown, producing 



a marbled appearance. Margin and median line purplish. 

 Tentacles rudimentary. 

 Fig. 18. Upper surface. 



