Andrews. 
Fig. 11. 
Fig. 12. 
Fig. 13. 
Fig. 14. 
Annulus Ventralis. 
PLATE 44. 
Cambarus affinis. 
Longitudinal vertical section of annulus less than 24 hours after 
laying, with sperm left in recess to the left. Showing relations 
of exoskeleton, epidermis, and connective tissue, and also cavities 
within exoskeleton. 2 X A. 
Section of elongated epidermis and connective tissue from beneath 
trumpet; same series as figure 15 (pi. 45). 2 X D. 
Section of epidermis and connective tissue, fixed in Worcester’s 
fluid with acetic. 2 X D, 
View from left side of thick longitudinal section of exoskeleton of 
annulus cleared in oil of cloves. Shows winding tube of trumpet, 
the curved slits leading to the surface, and the recess to extreme 
left (and above) still containing sperm more than 24 hours after 
laying. 2 X A. 
