1925 ] External Anatomy of Head and Abdomen of the Roach 219 
var. . . V ulvarcus 
vbr. . . Vulvabrachium 
vf.. . .Valvifer 
fgl... . Valviglandula 
vju.. .Valvijugum 
vl. . . . Valvilora 
vm. . . Vulvar membrane 
vpo.. . Valvipore 
vr. .. .Valviramus 
vs. .. . Valvisternite 
vul.. .Vulva 
vv... .Ventral valvulae (ventro- 
valvulse) 
x Occipital condyles 
y Cervical tendons 
z Cephaligers 
