126 C. F. R0US8ELET ON DIRLOIS TRIGONA. 



Helsingfors, # describes a new Anursea under the name of A. 

 eichicaldi, which seems identical with the above species, but his 

 figure does not show the two transverse lines. These ridges are 

 very low and fine, and probably not readily visible until the shell 

 is empty. Levander gives the size of his animal as '162 

 mm. = T -i T in. 



Explanation of Plates VI. and VII. 



Fig. 1. Micrcodides robnstus, side view. 



„ la. „ ,, dorsal view. 



„ lb. ,, „ corona, diagrammatical, 



lc. ,, ,, the toe, exact shape. 



Id. „ „ the jaws, front view. 



,, le. „ „ ditto, side view. 



,, 2. Diplo'is trigona, dorsal view. 



„ 2a. „ „ side view. 



5J 2b. „ ,, transverse section of lorica. 



„ 2c. „ „ the jaws. 



„ 3. Furcularia longiseta, var. grandis, side view. 



„ 3a. „ ,, „ dorsal view. 



„ 4. Microcodides doliaris, side view. 



„ 4a. „ „ the jaws. 



„ 5. Diaschiza mega locephala, side view. 



„ 5a. ,, „ ventral view. 



,, 6. Anuria cruciformis. 



* K. M. Levander, " Materialen zur Kenntniss der Wasserfauna in der 

 Umgebung von Helsingfors," "Acta Societatis pro Fauna et Flora 

 Fennica," xii., No. 3, pp. 1-72, 3 PI. Helsingfors, 1894 (published 

 July, 1895). 



