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Show 464 MR. P. W. BASSETT-SMITH ON [Apr. 18, G. 19. ECHTHROGALEUS Stp. & Liitk. Carapace as in Dinematura. Dorsal plates of last thoracic ring proportionally larger; no median processes posteriorly to genital segment; abdomen and caudal plates not projecting. Thoracic limbs as in the preceding genus, except that the inner branch of tbe second and third pairs has only two joints instead of three. (1) ECHTHROGALEUS COLEOPTRATUS. cf 2 • Dinemoura coleoptratus Guerin, Icon. d. Beg. animal, iii. 1817, pl. xxxv. fig. 6. Pandarus alatus Johnst. Loud. Mag. Nat. Hist. viii. 1836, p. 202. Dinemoura alata M.-E. Hist. Nat. Crust, iii. 1840, p. 464. „ „ Baird, British Entom. 1850, p. 285, pl. xxxiii. fig. 8. Nogagus ? cf . Echthrogaleus coleoptratus Stp. & Liitk. Bidrag til Kundskab, 1861, p. 380, pl. viii. fig. 15. In Coll. Brit. Mus. Host: Lamna cornubica. (2) ECHTHROGALEUS NEO-ZEALANICUS. 2 • Dinematura neozealanica Thomson, Trans. N. Z. Inst. 1839, vol. xxii. p. 359, pl. xxv. fig. 2. Host: " Shark." New Zealand. (3) ECHTHROGALEUS AFFINIS. 2 cf • Dinemoura affinis M.-E. Hist. Nat. Crust, iii. 1840, p. 465, pl. xxxviii. fig. 15. „ ,, Stp. & Liitk. Bidrag til Kundskab, 1861, p. 382. Dinematura braccata Dana, U.S. Expl. Exp., Crust, ii. 1848, p. 1370, pl. 95. fig. 4. Nogagus braccata 8, Heller, Beise d. Novara, 1865, p. 197, pl. xx. fig. 3. In Coll. Brit. Mus. Host: Leptocarcharias sp. New Zealand and Tongatabu. (4) ECHTHROGALEUS INDISTINCTUS. 2 • Dinematura indistincta Kr. Bidrag til Kundskab, 1863, p. 183. Host:-? Valparaiso. DIVISION ii. Pandarinos.-All the limbs provided with hook-like appendages, or with the edges quite smooth. G. 20. CECROPS Leach. Carapace oval, robust, deeply notched in front. Anterior antenna? small, hidden. Last thoracic segment with a pair of short dorsal plates. Genital segment as long as cephalothorax. Abdomen small. Caudal plates minute. All the thoracic limbs biramose, increasing |