W. H. Letgh-Sharpe 217 
are set at right angles to the undersurface of the lamina, and are marginal 
only at the apex, while they form a loop and do not approach the margin at 
the base. Towards the convex edge of the lamina the number of teeth is 
twenty; along the concave edge they are more numerous. 
There follow two pairs of appendages of uncertain homology, variously 
styled maxillae or maxillipedes. They are both on the same plan, two-jointed, 
there being in each case a stout basal joint, with a bulbous distal joint, ter¬ 
minating in a long straight style. The anterior pair is distinguishable by having 
mm. 
Fig. 5. Medesicaste. The posterior end. a. abdomen; m. muscle; V. vulvae; S. spermathecae; 
C.T. conjunctive tubes. 
the inner margin of the style strongly serrated (Fig. 3, 1 max.). There are 
six large, stout spines away from the apex which interlock in a scissor-like 
manner with those of its partner. The thoracic appendages have already been 
described (v. supra); their surface is covered with numerous very minute 
prickles. 
The most striking feature, now for the first time described, is the presence 
of the conjunctive tubes. These occur in three of the specimens, which are 
immature, bear no ovisacs and are embedded in relatively large tumours. 
