Fio. 3. — AstacusfvviatUis. — Ventral or sternal views (iiat. size). A, male ; B, female : — 

 a, vent ; gg, oiiening of the green gland ; Ih, labrum ; mt, metastoma or lower 

 lip ; orf, opening of the oviduct ; vd, that of the vas deferens. 1, eye-stalk ; 2, 

 antennule ; 3, antenna ; i, mandible ; S, second maxillipede ; 9, third or external 

 maxillipede ; 10, forcejis ; 11, first leg ; li, fourth leg ; l:j, 16, 19, M, first, second, 

 filth, and sixth abdominal appendages; x., xi. , xiv., sterna of the fourth, fifth, 

 and eighth thoracic somite ; xvi., sternum of the second abdominal somite. In the 

 male, the 9th to the 14th and the 16th to tlie 19th appendages are removed on 

 the animal's left side : in the female, the antenna (with the exception of its basal 

 joint) and the .0th to the 14tli appendages on the animal's right are removed ; the 

 ■d to tlie swimnierets of the left side of the body. 



