224 BRACHIONUS. 



tation which it frequently exhibits is not to be compared with a 

 true segmentation of the trunk. If the Rotifers, as seems not 

 impossible, exhibit crustacean affinities, the ' foot ' may perhaps 

 be best compared with the peculiar ventral spine of the Nauplius 

 larva of Lepas fascicularis (vide Chapter on Crustacea) which in 

 the arrangement of its spines and other points also exhibits a 

 kind of segmentation. 



BIBLIOGRAPHY. 



(232) F. Cohn. " Ueb. d. Fortpflanzung von Raderthiere. " Zeit.f. imss. Zool. 

 Vol. vn. 1856. 



(233) F. Cohn. " Bemerkungen ii. Raderthiere." Zeit. f. wiss. Zool, Vol. IX. 

 1858, and Vol. xn. 1862. 



(234) T. H. Huxley. " Lacinularia socialis." Trans, of the Microscopical 

 Society, 1853. 



(235) Fr. Leydig. "Ueb. d. Bau u. d. systematische Stellung d. Rader- 

 thiere." Zeit.f. wiss. Zool. Vol. VI. 1854. 



(236) \V> Salensky. "Beit. z. Entwick. von Brachionus urceolaris." Zeit. f. 

 wiss. Zool. Vol. xxn. 1872. 



(237) C. Semper. " Zoologische Aphorismen. Trochosphsera aequatorialis." 

 Zeit.f. iviss. Zool. Vol. xxn. 1872. 



