158 Macteay Memorran Vouume. 
EXPLANATION OF PLATE. 
PLATE XVI. 
Fig. 1.—Semi-diagrammatic general view of the external form and internal organisation of Actinodactylus, 
viewed from the dorsal aspect, the body moderately extended. 67., points to the position of 
the brain; ph., pharynx ; v.v., some of the irregular lobes of the vitelline gland ; 2, intestine ; 
ov., ovary ; wt., uterus ; b.c., bursa copulatrix ; ¢.¢.¢.4., testes ; v.s., vesicula seminalis ; ¢., cirrus ; 
r.v., receptaculum vitelli; s., posterior sucker. 
Fig. 2.—Ventral view of the head end ; the animal is more contracted than that represented in fig. 1. s. 
anterior sucker ; p., proboscis. The representation of the proboscis cannot lay claim to perfect 
accuracy, as a view of it favourable to making a drawing was not obtained. 
Fig. 3.—Section of the integument of Actinodactylus. cu., cuticle ; ep., epidermis ; b.m., basement-mem- 
brane (?) ; ¢.m., circular layer of muscle. 
Fig. 4.—From horizontal section of pharynx, showing section of the lateral wall. e.c., external circular 
layer ; ¢./., external longitudinal layer ; 7., radial fibres ; 7/., internal longitudinal ; 7.c., internal 
circular ; ¢., internal lining membrane. 
Fig. 5.—Reproductive apparatus of Actinodactylus as seen in living specimen. 7.v., receptaculum vitelli ; 
ov., ovary ; 0.d., oviduct ; s., oviducal spines ; wé., uterus; b.c., bursa copulatrix ; g., position of 
genital cloaca ; v.d., left, v.d’., right, vas deferens ; v.s., vesicula seminalis ; ¢., cirrus. 
