60 
PROFESSOR H. N. MOSELEY. 
margin of the shell is indented at intervals ; it overhangs the girdle part of 
which is shown beneath it. a a a. Tubercles on the shell surface, dd. Eyes. 
Fig. 10. — View of the anterior shell of a specimen of Corephium 
aculeatum, enlarged 2 diameters, showing the regular rows of tubercles. 
a. Articulamentum. t. Tegmentum. 
Fig. 11. — A portion of the surface of the tegmentum of the same shell 
near its articulamental margin, enlarged 17 diameters, a a. Tubercles form- 
ing rows, d d. Eyes. x. Small area, more highly magnified in Fig. 12. 
Iig. 12. — Small area on the surface of the tegmentum of the anterior 
shell of Corephium aculeatum, enlarged 185 diameters, d. Oval eye. 
a a a. Megalopores. b b b. Micropores. 
