fiODWlN-AtJSTEN : IMPORTANCE OF ANIMAL IN LAND MOLLUSCA. 37 



that they are both smaller, they do not meet, the left is marginal over 



" 5-^" Da 



Fig. 3. — Shell lobes. D. — Austenia gigas Benson. 



Animal spirit specimen, shell removed, dotted line on viscera 

 .sac marks e.xtension of shell-lobes in life. 

 Da. — Austenia butleri Godwin-Austen. 

 E. — Girasia liookeri Gray. Viewed from right, left, and dorsal side. 



Three-quarters natural size. 

 Ea. — Shell. 'J'hree-quarters natural size. 



YJ\i. — Gh'asia crocea Godwin-Aiisten. From life. % natural size. 

 Y.—Cryptogirasia rubra Godwin-Au;ten. Right and left side, from life. 

 Fa. — Shell magnified, and natural size. 



