ENTOMOSTRACA OF THE SCOTTISH NATIONAL ANTARCTIC EXPEDITION. 295 



outer margins of both rumi are fringed with minute bristles, but in the outer ramus, 

 the spinules at the outer distal angles of the first and second joints, and also those on 

 the third joint, are tolerably stout and elongated. In the second and third pairs the 

 inner ramus is ral her shorter than the outer, and the end joint is about twice as long as 

 the proximal one. In the fourth pair the inner ramus is considerably shorter than the 

 outer one, and scarcely reaches to the end of its middle joint. The fifth pair are of 

 moderate size; the inner portion of the basal joint is somewhat expanded, and pro- 

 vided with four setae two on the inner margin and two at the apex ; the second joint 

 is smaller, and furnished with three setaj at the distal end ; all the setse are elongated. 

 Caudal rami short, and about equal in length to the last abdominal segment. 



II(d>itt. South Orkney Islands; collected in June 1903, GO 43' 42" S., 

 44 38' 33" W., Station 325. Only one specimen a female was observed in some 

 siftings from dredged material. Named in compliment to Dr II, N. RUDMOSE BROWN, 

 the Scotia naturalist, who was in charge of tow-netting, and who in consequence was 

 the collector of the whole material dealt with in this monograph. 



Fam. ECTINOSOMID^;. 

 Genus Ectinosoma, Boeck, 18(14. 

 AW//MWK///,/ iintarcticum Giesbrecht. (PI. II. figs. 10-13.) 



1902, Ei-tinnxonia iiiiliii-i-tii'/nii, (JiYsli., A>/W. An/urrf. JM;/i; " Copepoden," p. 31, Taf. 12. 



One or two specimens (females) of an Ectinosoma apparently belonging to this 

 species were obtained in one of the small gatherings of dredged material collected by the 

 Scotia among the South Orkney Islands, Station 325, 60 43' 42" S., 44 38' 33" W., and 

 in these specimens the structure of the various appendages agrees very well with the 

 description of the species given by Dr GIESBRECHT. In the genus Ectinosoma, the form 

 and armature of the fifth pair of thoracic legs are usually regarded as furnishing 

 important specific characters, and in these Scotia specimens, the fifth pair of legs are 

 identical with those oS. Ectinosoma <iiit<(r<-tn-inn, as shown by Dr GIESBRECHT'S figures, 

 and also by our drawings on PL II. fig. 14. 



Genus llrtt<li/rt; Boeck, 1872. 

 Bradya /irn.,-/,//a, new species. (PL II. figs. 1-9.) 



Female. Body moderately robust. Antennules short and stout. Antennae with 

 the outer ramus well developed, and reaching to the end of the inner ramus. Mandibles, 

 maxillae, and maxillipeds similar to those in Bradya typifd, Boeck. 



In the first four pairs of thoracic legs both rami are of moderate length, and the 

 joints are somewhat broad and flattened, and the marginal spines of the outer ramus 

 are also elongated and slender. In the fifth pair there is a considerable space between 



(KOY. soc. BDIN. TRANS., VOL. XLVIII., 541.) 



