26 
PitOFESSOE H.. N. MOSELEY. 
tnargin of thè shell is indented at intervals; it overliangs thè girdle part of 
which is shown beneath it. a a a. Tubercles on thè shell surface. dd. Eyes. 
Eig. io. — View of thè anterior shell of a specimen of Corephium 
aculeatum, enlarged 2 diaraeters, showing thè regolar rows of tubercles. 
a. Articulamentum. t. Tegmentum. 
Eig. 11. — A portion of thè surface of thè tegmentum of thè 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 Eig. 12. 
liG. 12. — Small area on thè surface of thè tegmentum of thè anterior 
shell of Corephium aculeatum, enlarged 185 diameters. d. Ovai eye. 
a a a. Megalopores. h b h. Micropores. 
