10 Dr. T. Scott on some 



form under consideration the antennules (fig. 8} consist of 

 eleven joints, the proportional lengths of which are, approxi- 

 mately, as shown in the formula appended : — 



Number of the joints . . 123456789 10 11 

 Proportional lengths . . 20 . 6 . 12 . 5 . 4 . 7 . 13 . 11 . 6 . 8 . 11 



In the fifth pair of thoracic legs the basal joint is mode- 

 rately short and broad and carries a long seta on its outer 

 distal angle, the second joint is small and is furnished at the 

 apex with a long seta and a short spine (PI. I. fig. 3) ; a 

 considerable space occurs between the seta at the distal 

 angle of the basal joint and the point of attachment of the 

 second joint, as shown in the figure. The caudal segments 

 are fully twice as long as the last segment of the abdomen 

 (PI. II. fig. 9). 



Some of the Literature referred to in the Text. 



(i) 1875. Brady, G. S. Ann. & Mag. Nat. Hist. ser. 4, vol. xvi. 

 Describes Centropages brtvicaudatus from Kerguelen Island. 



(2) 1905. Ekman, Sven. Schwedische Sudpolar-Exped. 1901-1903, 



Bd. v. Lieferung 4. " Cladoceren u. Copepoden aus Antarkt. u, 

 subantarkt. Binnengewassern. 



(3) 1905. . " Die Systematik und Synonymik der Copepoden- 



gattung Boecliella und verwandter Gattungen." Zool. Anzeiger, 

 Bd. xxix. Nr. 19. 



(4) 1889. Guerne, Jules de, et Jules Richard. " Revision des 



Calanides d'eau douce." Me'inoires Soc. Zool. de France, tome ii.1 



(5) 1901. Mrazkk, Al. "Hamburger Magalhaenische Sammelreise." 



Siisswasser-Copepoden. 



(6) 1895. Poppe, S. A., und Mrazek, Al. " Eutomostraken des 



Naturhistorischen Museums in Hamburg (2, Entomost. v. Sud- 

 Georgien)." Jahrb. d. Hamb. wissensch. Anstalten, xii. Beiheft. 



(7) 1897. Richard, Jules. " Entomostraca de la l'Amerique du 



sud." Memoires Soc. Zool. de France, tome x. pp. 263-302. 



(8) 1897. . " Sur qutdques Entomostracgs d'eau douce de envi- 



rons de Buenos Aires." Anales del Museo Nacional de Buenos 

 Aires, tomo v. 



(9) 1894. Sars, G. O. " Contributions to the Knowledge of the Fresh- 



water Entomostraca of New Zealand, as shown by Artificial 

 Hatching' from Dried Mud." Yid. Selsk. Skrif. i. Math.-Natur. 

 Klasse, No. 5. 



(10) 1901. . " Contributions to the Knowledge of the Freshwater 



Entomostraca of South America, as shown from Artificial Hatching 

 from Dried Material." Archiv for Mathematik og Naturvidenskab. 

 B. xxiv. Nr. 1. 



(11) 1903. . "Pacifische Plankton-Crustaceen." Zool. Jahr- 



biichern, Bd. 19, Abth. f. Syst. 



(12) 1908. . " Freshwater Entomostraca from Victoria, Southern- 



Australia." Archiv for Mathematik og Naturvidenskab. B. xxix, 

 Nr. 7. 



