CEUSTACEA OF THE MERGUI AECHIPELAGO. 305 



the median dorsal groove of the telson, the notch at the basal joint of 

 the uropoda, and the emarginatiou on the external uroramns. Fig. 3. 

 A part of the leg of the fifth pair of the male, X 4, showing the 

 " processus " near the proximal end of the meropodite. Fig. 4. A 

 part of the leg of the fourth pair of the male, X 4, showing the 

 enlarged meropodite. Fig. 5. Ventral plate of the female A, X 4. 

 Fig. 6. Ventral plate of the female B, X 4, with the bases of the legs 

 of the fifth pair. Fig. 7. E-ostrum of the male, lateral yiew, X 4, 

 with the hepatic spine, the antennal spine, and the supraocular tooth. 

 Fig. 8. Petasma, view of the posterior surface, presenting also the 

 bases of the anterior abdominal legs, X 4. Fig. 9. A part of the leg 

 of the fourth pair of the female, X 3, showing the simple meropodite. 

 Fig. 10. A part of the leg of the fifth pair of the female A, showing 

 tlie enlarged isehiopodite, X 4. Fig. 11. A part of the leg of the fifth 

 pair of the female B, X 4, showing the simple isehiopodite. — The 

 impressed parts of the surface of the cephalothorax and of the abdomen, 

 whiuli are pubescent, are somewhat sliaded. 



Li^'X. Juuny. — zooLOdr, vol. xxii, 20 



