24 



ZOOLOGISCHE MEDEDEELINGEN — DEEL IL 



gated. The tarsus is very small, the propodus slightly curved. The ter- 

 minal claw is short, about one third of the length of the propodus ; the 

 auxiliaries are nearly two-thirds of the main claw. The limbs bear dorsal 

 spines on the coxae, the femur and the first tibia ; ventral ones on the 



Fig. E. 



Pallenopsis (Rigona) aculeaia n. sp. 9. 



Third leg. 



femur and the first tibia only. The second 

 tibia and the propodus are covered dorsally 

 with rows of stiff setae. Propodus with small 

 ventral spines, very small near the distal end. 

 Most of the large spines are covered with 

 mud (Fig. Fa). When cleaned and seen 



under the microscope they appear to be feathered, showing small lateral 

 barbs (Fig. ¥b). 



Measurements in mm. : 



Fig. F. 



Pallenopsis (Rig on a) aculeaia 



n sp. Q. Spines of first tibia, 



magnified, a covered with mud; 



h clean one. 



Length of trunk: 2f. 

 Length of proboscis: 2. 

 Length of abdomen: \\. 

 Length of third leg: 22. 

 Length of female oviger : 2 

 Longest spines: f. 



Remarks. Of the four specimens only one (the type) is an adult 

 female, with the genital apertures on the second coxa of the legs, and 



