212 Transactions. — Zoology. 



could thus carry the eggs of these small crustaceans to distant 

 places ; but gulls seldom fly for any great length of time with- 

 out lighting on the surface of the sea, and the chances of their 

 being able to reach such an outlying spot with living eggs of a 

 species like Chydorus are very small. Along with the crus- 

 tacean was a solitary and minute Hydrachnid, which, how- 

 ever, in absence of knowledge of the Australasian Hydrach- 

 nida, has not been identified as yet. 



Order COPEPODA. 



Family Calanid.e. 



Among the material of the sponge taken from a fresh-water 

 pool were two specimens very imperfectly preserved of a species 

 of Copepod belonging to the GalanidcB. Unfortunately, even 

 with all possible care in dissecting, the bodies were in such a 

 soft and disintegrated condition that I could not accurately 

 separate and distinguish the legs. From the position in which 

 the specimens were obtained it seemed to me probable that 

 they lived in cavities in the sponge, and this might partly 

 account for the soft condition of their bodies. While the 

 mouth-parts were, on the whole, similar to those of Calanus 

 and allied genera, the fifth pair of legs seemed quite distinct 

 from anything I have met with before. The chances of getting 

 material collected representing the fresh- water fauna of these 

 antarctic islands are so few and far between that, even with the 

 imperfect data in my possession, I have thought it desirable to 

 provisionally describe the present form. 



Genus Guernea, :; nov. gen. 



Female. — Cephalothorax six -jointed (?). Anterior an- 

 tenna? 25-jointed. Posterior antennae two-branched, the 

 secondary branch, as in Calanus, having four small inter- 

 calated joints. Mandibles with a wide and strong cutting- 

 edge, and a two-branched palp, branches respectively two- 

 and four-jointed, setose. Maxilla? plate-like, with two lobed 

 processes fringed with marginal seta?. Anterior foot-jaws 

 strong, with numerous long seta? on the terminal joint. 

 Posterior foot-jaws five-jointed, the three last joints each 

 bearing a seta. Legs not clearly made out. Third (?) pair 

 with both branches two-jointed. Fourth (?) pair with outer 

 branch two-jointed, inner branch one-jointed. Fifth pair with 

 both branches one-jointed, consisting each of a single plate. 

 Abdomen four-jointed (?) ; caudal seta? short. 



* After M. Jules de Guerne, Vice-President de la Societe Zoologique 

 de France, and joint author with M. Jules Richard of the " Revision des 

 Calanides d'Eau douce." 



