134 MK, G. S. BEADY ON THE CRUSTACEAN FAUNA OF THE 



the external branch three-jointed, the internal two-jointed, not 

 prehensile ; both branches of the three following pairs tri-artic- 

 ulate ; fifth pair rudimentary, foliaceous. Two ovisacs. 



This genus differs from Dactylopus and ThaJestris chiefly in 

 the structure of the first pair of feet, one or both branches of 

 which are, in those genera, prehensile. The absence of a flagel- 

 lum in the upper antenna, and the presence of two ovisacs con- 

 stitute further distinctive characters. 



Delavalia palustris, n. sp. 



Body of the female robust, the segments not pectinated on 

 their lower margins. Upper antennae short, densely setose on 

 the superior margin, gradually tapering to the ap3x, last jomt 

 slender, longer than any of the preceding. Superior margin of 

 the apical joint of the lower antennae pectinately setose ; the 

 last three setae longer than the rest, and almost spinous ; apex 

 bearing five or six long curved setae ; secondary branch slender, 

 bi-articulate. The two branches of the first pair of feet nearly 

 equal in length ; the inner bi-articulate, its apical joint narrow, 

 and much longer than the basal, terminating in two long sub- 

 equal spinous setae ; external branch composed of three nearly 

 equal joints, the last terminating in two setae, like those of the 

 inner branch. Both branches of the second, third, and fourth 

 pairs tri- articulate, the outer nearly twice as long as the inner. 

 Fifth pair of feet small, subovate, lower margin bearing about 

 five setae. Ovisacs two, divergent. Length, gVnd of an inch. 



Hab. — In brackish pools at Seaton Sluice, Northumberland. 



Family. CALANIDiE. 

 Genus. TEMORA, Baird. 



Temoea velox, LiUjehorg. 



Temora velox, Brady. Nat. Hist. Trans. North, and Durham, 

 Vol. I., p. 88, Plate I., fig. 16, and Plate III., figs. 1-11. 



This is the most abundant of all the brackish-Avater Copepoda. 



