Crustacea. 297 



Verf. fand in Wolynien und Podolien 17 bisher in Polen unbekannte Ostracodenspeciee. 

 Es sind bis jetzt 29 Species in Polen bekannt, unter welchen eine neue Species, Cypris 

 nusbmimi, vom Verf. entdeckt. J. Nusbaum. 



768) Brady, Gl. Stewardsou, On two British Entomostraca belonging to the 

 Orders Copepoda and üstracoda. In: Proc. Zool. Soc. London, Part. II, S. 231 — 

 231, 3 Taf., 1913. 



The anthor describes here two species that occurred in gatherings made many 

 years ago. Diaptomus gracilis is a new species from Loch Ness, Scotland. Ärunella subsalsa 

 is a remarkable Ostracod frow the river Arun, near Arundel in Sussex England, for the 

 inclusion of which a new genus has becn crcated. The description is based on a single 

 specialen, a male. This male possessed a remarkable biramous appendage, which the 

 author supposes to be homologous with the "processus piliferus". stated by G. 0. Sars 

 to be fouud between the feet of the first pair in the male of Buirdia siibdeltoidea. 



Saunders. 



769) Farrau, Gl. P., Plankton from Christmas Island, Indian Ocean. II. On 

 Copepoda of the Genera Oitliona and Paroithona. In: Proc. Zool. Soc. 

 London, Part. II, S. 181 — 193, 5 Taf., 1913. 



The author gives an accouut of species belonging to the genera Oithona and Par- 

 oitho»a that occurred in a small collection of Plancton made by Sir John Murray 

 and C. W. Andrews at Christmas Island in the year 1908. 



To the genus Oithona belonged eleven species, of these five were already known 

 and six were new. Those already known were Oithona plumifera, 0. setigcra, 0. line- 

 aris, 0. robusta and 0. nana. The six new species are described as Oithona vivida, 

 0. decipiens, 0. fallax, O. attenuata, 0. simplex and 0. oculata. The closely allied genus 

 Paroithona, previously known from a single species in the N. E. Atlantic is represented 

 by a new species, P. pulla. 



The author gives notes on the occurrence of the species, the new species are fully 

 described and tigured and at the end of the paper these is appended a diagnostic table 

 for the Identification of all species of Oithona and Paroithona, that have been adequa- 

 tely described. Saunders. 



770) Gurney, Robert, Some notes on the parasitic Copepod, Thersitina 

 gasferosfri Pagenstecher. In: Ann. and Mag. Nat. Hist., Vol. XII, S. 415 — 

 423, 4 Taf., 1913. 



The author found this species in abundance in a ditch near Yarmouth (Eng- 

 land). Both Gasterostcus aadeatus and G. pungltius lived in this ditch, but G. pun- 

 gitius was little infected. An account is given of the life history, with descrip- 

 tions of the various stages. The female is fertilised in the free-swimming stage. 

 The male is adequately described for the first time, for a previous description 

 by Kröyer is really that of an adult female in the free-swimming stage. 



It is interesting to note that whereas there is in Ergasilus a ventral nerve- 

 cord with ganglia corresponding to each of the swimming legs, in Thersitina, on 

 the other hand the nerves of the first three pairs of legs arise from the poste- 

 rior angles of the great postoesophageal ganglion. This ganglia also sends off a 

 pair of slender cords which run back for a considerable distance before sending 

 off nerves to the fourth pair of legs. There are no separate thoracic ganglia in 

 Thersitina . Saunders. 



771) Stewart, Dorothy A., Report on the Extra-Antarctic Amphipoda Hype- 

 riidea collected by the "Discovery". In: Ann. and Mag. Nat. Hist., Vol. 12, 

 S. 245—265, 4 Taf., 1913. 



The specimens described by Stewart were caught by the "Discovery Antarctic 

 Expedition" on their journey southward in the tropical and sub-tropical waters of the 

 South Atlantic, a single subantarctic species, Hyperiella antarctica was taken from a 

 more southerly latitude. The author remarks on the need for a revision of this genus, 

 very trifling characters have often been used for Identification and in some cases the 

 author had to rely chiefly on locality for determining the species. 38 species are found 



