636 
DR. RUDOLPH YON WILLEMOES-SUHM ON THE 
br. Branchiae. 
C. Three pairs of abdominal feet. 
as. The anus. 
Fig. 2. The same, seen from above. The head entirely covered by the faceted eyes (oc), 
as. The anus. 
Fisr. 3. The same. View from the side. 
oc. Eyes. 
ap. Line of brownish appendages. 
o. Mouth. 
C(B. Gastric caecum. 
in. Intestine. 
gp. Genital papilla. 
ov. Ovary. 
c. Heart. 
PLATE L. 
Fig. 4. Embryo in the egg, seen from above. x70. 
Fig. 5. The same, seen from the side. x70. 
Fig. 6. Papilla of the mouth (A) and genital papilla (B), seen from below, x 10. 
ma. Maxillae. 
lab. Labium. 
0. Opening of the mouth. 
c. Depression for the oviducal apertures. 
1. Breeding lamellae. 
sp. Small scarlet spines. 
d. Large spine at the entrance of the vulva. 
Fig. 7. Facets of the cornea. x70. Represented diagrammatically. 
Fig. 8. Chitinous aj)pendages at the lateral line of the eye, showing also the chitino- 
genous layer of the carapace. Xl20. 
Fig. 9. Two pairs of crystalline bodies. Xl20. 
Fig. 9 a. Point of union of one pair of the crystalline bodies. x!2Q. 
