LOBSTER (HOMARUS VULGARIS) CONT"- 



PLATE XIII. 



Longitudinal Horizontal Section iFemale/ 



y 



Fig. 2. Longitudinal Vertical Sectipn i Ma 



Fig.3. FRESH-WATER CRAYFISH ( A S T A C U S FLUVIATIUIS 



, (Female | 



K Jobsaton Edinburgt feLoi 



