192 MR. G. p. FARRAN ON 



b. 5tli foot with two terminal setae. ' 



aa. Mandible with large spines on 2nd basal ; 



length '64 mm O. minuta {\Q). 



bh. Mandible with small spines on 2nd basal. 



a. Terminal spines of exopodites of swimming- 

 feet ver^' long; length '9 m.m O. oculata. 



j5. Terminal spines of exopodites of swimming- 

 feet shorter than the 3rd joint ; length "75- 



•85 mm O. rigida (14). 



B. Endop. of all swimming-feet two-jointed (Genus 

 Paroithona). 



a. Exop. of 4th foot with 1.1.1 outer edge spines; 



length "46 mm F. parvula {\0). 



b. Exop. of 4th foot with 0.0.1 outer edge spines; 



length ■40-'43 mm JP.pulla. 



I have omitted from the table 0. challengeri (3) (4), 0. spini- 

 frons (2), 0. spinirostris (5), 0. helgolandica (5), and 0. pygmcea 

 (2). The identity and probable synonymy of these species have 

 been fully discussed by various wr-iters and it is unnecessary to 

 consider them further. - 



Literature referred to. 



(1) Baird, W.—" Notes on British Entomostraca," Zoologist, 



vol. i. 1843. 



(2) Boeck, a.— Yid. Selsk. Forhandl. Christiania, 1864. 



(3) Brady, G. S. — ' Challenger ' Reports : Copepoda, pt. xxiii. 



1883. 



(4) Brady, G. S. — Die Marinen Copepoden der Deutschen Siid- 



polar-Expedition, 1910. 



(5) Glaus, C. — Die freilebenden Copepoden, 1863. 



(6)' CiiAus, C. — "Die Copepoden Fauna von Nizza." Schr. Ges. 

 Naturw. Marburg, 1866. 



(7) Cleve, p. T. — " Plankton from the Indian Ocean and Malay 



Archipelago." Konigl. Sv. Yet.-Akad, Handl., Bd, 35, 

 no. 5, 1901. 



(8) Dana, J. D. — Amer. Journ. Sci. (2) vol. viii. 1849, 



(9) Dana, J. D. — U.S. Explor. Exped., vol. xiii. Crustacea, 1852. 



(10) Farran, G. p. — Second Report on the Copepoda of the 



Irish Atlantic Slope. Fisheries, Ireland, Sci. Invest., 

 1906, ii. [1908]. 



(11) Fakran, G. p. — "Note on the Copepod Genus Oithona." 



Ann. Mag. Nat. Hist. (8) ii. 1908. 



(12) Giesbrecht, W. — Atti Accad. Lincei Eoma, vol. vii. 1891. 



(13) Giesbrecht, W, — Fauna u. Flora des Golfes von Neapel, 



vol. xix. Copepoda, 1893. 



(14) Giesbrecht, W. — "Ueber pelagische Copepoden des Rothen 



Meeres." Zool. Jahrb., Syst. Bd. ix. 1897. 



(15) Giesbrecht, W. — Resultats du Voyage du S.Y. Belgica. 



Copepoden, 1902. 



(16) Scott, T. — " Report on Entomostraca from the Gulf of 



Guinea." Trans. Linn. Soc. London (2) vol. vi. 1893. 



(17) WoLFENDEN, R. N. — Fauna and Geography of the Maldive 



and Laccadive Archipelagoes, vol. ii. Suppl. 1, Copepoda, 

 1905. 



