176 Searle, Some Victorian Copepoda New to Science. [^'^jan^^'^^' 



outer l)ranch 3-jointed, the second joint carrying a stout spine, 

 which is not plumose ; the inner branch is 2-iointed. 



Co/o?/r.— Green. 



Length. — .75 mm. to i mm. 



Occurrence. — Cheltenham, Victoria. 



Distribution. — Bruni Island, Tasmania. 



The Male. — The male is somewhat smaller than the female. 

 The abdomen has five distinct segments, and the antenna on 

 the right side is geniculated or jointed in such a manner as to 

 be used as a clasping organ. 



The fifth pair of legs are very remarkable. The right leg 

 has the outer branch 2- jointed, the joints being flattened and 

 expanded : the second joint terminates with a short, stout 

 spine. The inner branch is 2-jointed, the second joint bearing 

 four long setcT. The other joint has a peculiar lobe or pro- 

 jection on it, and yet another internal lobe attached to its base. 

 The left leg has the outer branch 3-jointed, the last joint being 

 prolonged into a curved spine or claw. There is a small spine 

 at the top of the first joint, and another small spine on the 

 inner base of the claw. The inner branch is 3-jointed, the last 

 joint bearing four setae. 



Brunella australis, J. Searle, n. sp. 



This is a larger and more beautiful species than B. tasmanica. 

 The structure of the mouth j^arts and number of joints in the 

 thoracic limbs agree with B. tasmaniau the principal differences 

 being — 



Female. — In the female the lateral projections on the fifth 

 thoracic segment are very conspicuous, the outer lobes being 

 long and pointed, the inner very small and rounded at the encl. 

 The fifth pair of limbs have one or two additional spines or 

 setae on the external branch. 



The first antennae have, at about equal distances apart from 

 base to top, four setae that are very much longer than the other 

 setae on the antenuce, and extend forward, while at the end of 

 the third last joint there is a long seta that extends backwards. 

 The tenth, eleventh, and twelfth joints of each of the first 

 antenna are of a bright red colour, contrasting greatly with 

 the rest of the antenna, which is of a pale green colour. 



Male. — As is general with the Copepoda, the male is smaller 

 than the female. 



The fifth pair of legs are even more remarkable than those 

 of B. tasnianica. In the right leg the second joint of the 

 external branch, instead of being spatulate, as in B. iasmanica, 

 is placed somewhat at an angle with the first joint, and is 

 curved outwards and rounded at the end, the concave surface 

 being covered with minute projections or s])ines. The left leg 

 has a small spine on the first joint of the outer branch, a longer 



