F. A. POTTS PLATE 1. 
Hapalocarcinus marsupialis. Female. 
Fig. 1.—Stage I. Ventral view. Narrow abdomen and no reproductive apertures. Carapace 
length, 1.75 mm. X 18. 
Fig. 2.—Stage II. Ventral view. Abdomen reflexed to show rudiments of the three pairs of 
appendages. Female apertures developed. fa., position of the generative apertures; 
r.s.,rudimentary appendages of the abdomen. Carapace length,2.0mm. X 18. 
Fig. 3.—Stage III. Ventral view of abdomen only. X18. 
Fig. 4.—Stage IV. Ventral view of individual boiled in caustic potash and mounted in Canada 
balsam so that the female apertures and the abdominal appendages can be seen under- 
neath the abdomen. Carapace length 3.0mm. X 18. 
Fig. 5.—Stage V. Ventral view. X 8. 
