Vol. XXVII 



IQII 



J Searle, Some Viclorian Copepoda New to Science. ijy 



S}iiiu' on the second joint, hut has no spine on the claw. These 

 curiously sha])ed limbs are used by the animal durin:^- copula- 

 tion, though the exact manner in which they are used is still 

 somewhat obscure, the act being so rapid that the eye could not 

 grasp every movement of the hmbs, though it has been observed 

 repeatedly. What happens appears to be this : — The male, 

 with his right antenna, clasps the female, and hooks the long 

 curved chnv of the left thoracic foot round her abdomen. At 

 first the female struggles to escape from his embrace, and thus 

 locked together they pull each other about the observation 

 tank, finally sinking slowly to the bottom of the tank, where 

 they may remain several hours, or, again, the whole act mav 

 be accomplished in a few seconds. When the psychological 

 moment arrives, the male appears to lift the operculum of the 

 female with the curious second joint of the right leg, while the 

 spermatophore is attached by its open end, wl^ich is the last 

 part to leave the body of the male, close to the genital opening 

 of the female, the leg, I think, being used to attach it, the 

 whole act being accomplished in about 1 of a second. 



Colour.— Green, with red band on the antennae. 



Length. — 1.75 mm. 



Occurrence. — Xyora, 55 miles S.E. from Melbourne. 



Bruxella viridis, J. Searle, n. sp. 



In appearance and size this species resembles 13. aw^iralis, 

 but is of a beautiful iridescent green colour when living. 



Female. — The head and segment fused to it is longer than 

 the succeeding two segments, the head being more rounded than 

 B. australis. The lateral projections on the fifth thoracic 

 'segment differ from those of B. australis, and it docs not 

 possess the red band on the antennce. 



Male. — The fifth pair of legs of the male differ from those 

 of B. australis, as shown in the figure. 



Colour. — Iridescent green. 



Length. — 1.75 mm. 



Occurrciu-e. — Heidelberg. 



Brunella ampulla, J. Searle, n. sp. 



This is a small species, and was taken in a tow-net, together 

 with several other species of Copepoda. 



Female. — Head and segment fixed to it is longer than the 

 two following segments. The fifth thoracic segment has lateral 

 projections that are not symmetrical — that on the right side 

 being longer than that on the left, and the ends are rounded. 

 The first antennae are longer than the extreme length of the 

 animal, and contain 25 joints. The second antennae are smaller 

 than is usual, while the mandibles. maxill?e. first and second 

 maxillipedes are large in comparison with the size of the 

 animal, and the setju that terminate the first fourth thoracic 



