ENTOMOSTRACA OF THE SCOTTISH NATIONAL ANTARCTIC EXPEDITION. 303 



the second joint is of a broadly ovate form, its greatest width being equal to about 

 half the length, and it carries four (or five) short setaj round the lower part of the 

 outer margin and apex, as shown in the drawing (fig. 30). 



Caudal rami short. 



Habitat. — Scotia Bay, South Orkneys; collected in June 1903; Station 325, 

 60° 43' 42" S., 44° 38' 33" W. No males observed. 



Remai-ks. — As already stated, this species has a somewhat close resemblance to 

 Tis})e 7ninor (T. Scott), first described in the Annals of Scottish Natural Histor-y in 

 October 1896, Irom specimens obtained in the Firth of Clyde. The same species has 

 also been recorded from Norway by Professor G. 0. Sars, and it was one of the 

 Harpactids discovered l)y Dr Bruck in Franz Josef Land. But the Antarctic form, 

 though closely resembling the northern species referred to, may be readily distinguished 

 from it by the broadly ovate form of the second joint of the last pair of thoracic legs. 



The genus Tishe, as Professor G. 0. Sars remarks, "seems to be represented in all 

 parts of the oceans," and he has " even found one or two species of this genus in the 

 Caspian Sea." * Dr CtIp:sbreoht obtained two species belonging to the Idya^i in the 

 collections brought home from the Antarctic by the Belgica in l8'J9;t l>oth these 

 species, however, differ in several respects from those observed in tlic material collected 

 liy the Scotia; and they differ especially in the structure of the first and fifth pairs of 

 thoracic legs. I am also unable to identify the Scotia species with either of those 

 recorded by Dr Brady in his account of the Copepoda-Harpacticoida of the Deutsche 

 Siklpolar Expedition, pp. 560, 561. J 



Tishe (jracilipes, new species. (PL I. figs. 23-29.) 



Female. — The female of this species is somewhat like that of 2'ishe gracilis (T. 

 Scott) in its general form, being elongated and rather slender. 



The antennules are tolerably elongated ; the second joint is rather longer than the 

 third, which, in its turn, is about one and a lialf times the length of the fourth joint. 

 The three following joints are small, while the end one is equal to the two preceding 

 joints combined (fig. 23). 



Antenniy moderately slender, the outer ramus four-jointed and rather longer than 

 tlie penultimate joint of the inner ramus (fig. 24). The mandibles and other mouth 

 organs are somewhat similar to those in Tishe gracilis. 



The thoracic legs arc also somewhat similar to those in the species mentioned, but 

 in the first pair, the second joint of the inner ramus is proportionally more elongated, 

 being fully one and a half times the length of the first joint. The outer ramus scarcely 

 reaches to the end of the first joint of the inner one (fig. 26). In the fourth pair, the 



* Crustacea of Norwaij, vol. v. p. 88 (1905). 



t Resultats du Voyage du s.xj. " IJelgica," " Uopepoda," vuii ])v W. Giesbreclit, p. 38 (1002). 



I Deutsche Siklpolar ExjmL, 1901-1903: " Uber die Oopepodeu der SUimme Harpacticoidn, Cyclopoid:'," etc. 

 (1910). 



(koy. soc. edin. trans., vol. XLVIII., .')49.) 



