PLATE I. 1 



Fig. 



1. Amphiporus lactifloreus, Johnston, pinkish variety. Enlarged. 



2. „ „ whitish variety. Slightly enlarged. 



3. „ pulchra (0. E. M.), Johnst. Enlarged. The specimen is a female, and the 

 bright reddish ova shine through the translucent integuments. 



4. Tetrastemma dorsalis, Abildgaard. Enlarged. This variety has a pale dorsal stripe. 



5. Nemertes carcinophila, Kolliker. Enlarged. 



6. Everted proboscis and anterior end of Nemertes gracilis, under pressure. X 55 diam. 



1 The lines in the various plates indicate the natural length of the animals. 



