THE CIRRI I 1 ED I A 141 



ORDER 5. Rhizocephala. 



Mantle present. No appendages nor alimentary canal. A system 

 of absorptive roots nearly always present. 



Families not denned. Probably several should be recognised. Pelto- 

 f/aster, Rathke ; Sacculina, Thompson (Fig. 80) ; Sylon, Krcyer ; Clistwic- 

 cus, Lilljeborg ; LartMeodiscut, F. Milller ; Triangulus, Smith ; Duplorbis, 

 Smith ; Thompsonia, Kossmann. 



LITERATURE. 



1. AuricUlius, C. Jr. S. Ueher einige ober-silurische Cirripetlien aus Got- 



land. Bih. .Svenska Vet. Akad. Handl. xviii. Afd. iv. No. 3, 24 pp. 1 pi., 

 1892. 



2. - - Studicn iiber Cirripedien. K. Svenska Vet. Akad. Hundl. (u.f.) xxvii. 



(7), 107 pp. 9 pis., 1895. 



3. Benu.lt, W. Zur Biologic und Anatomic von Alcijtpe lumpus. Zeitschr. 



wiss. Zool. Ixxiv. pp. 396-457, pis. xix.-xxii., 1903. 



4. Studien an bohrendcn Cirripedien (Ordnnng Acrothoracica, Gruvel, 



Abdominalia, Darwin). Arch. f. Biontologie, i. (2) pp. 165-210, pis. xiv.- 

 xvii., 1906. 



5. Clems, C. Die Cypris-iihnliche Larve (Puppe) der Cirripedien. . . . Sehr. 



Ges. Naturw. Marburg, Suppl. Heft v. 17 pp. 2 pis., 1869. 



6. Dancin, 0. A Monograph of the Sub-Class Cirripedia, 2 vols. 8vo. Ray 



Soc. London, 1851-1854. 



7. - - A Monograph of the Fossil Lepadidae . . . 1851. A Monograph of 



the Fossil Balanidae ami Vemicidae, 1854. Palaeontographical Soc. 



8. DcliKjc, Y. Evolution do la Sacculine. Arch. Zool. ex pur. (2), ii. pp. 417- 



736, pis. xxii.-xxx., 1884. 



9. Fowler, G. H. A Remarkable Crustacean Parasite [1'elrarca]. Quart. J. 



Mi<-r. Sci. (n.s.) xxx. pp. 107-120, pi. viii., 1889. 



10. Groom. T.T. On.the Early Development of Cirripedia. Phil. Trans, clxxxv. 



pp. 119-232, pis. xiv.-xxviii., 1895. 



11. - - On the Mouth-Parts of the Cypris-Stage of Balanus. Quart. J. Micr. 



Sci. (n.s.) xxxvii. pp. 269-276, pi. xxix., 1895. 



12. (f r itvel., A. Monographic des Cirrhipudes on Thecostraces. 8vo. Paris, 



1905 [1904]. 



13. Hanscn, H. J. Die Cladocereu und Cirripedien der Plankton-Expedition. 



Krgeb. Plankton-Exp. ii. 58 pp. 4 pis., 1899. 



14. Hock, P. P. C. Report on the Cirripedia. Rep. Voy. "Challenger," Zool. 



viii. 169 pp. 13 pis., 1883 ; and x. 47 pp. 6 pis., 1884. 



1"). Ki-ohii, An;/. Jjeob. ii. d. Cementapparat u. d. weiblichen Zeagangsorgane 

 einiger Cirripedien. Arch. f. Naturgesch. xxv. pp. 355-364, 1859. 



16. L.-it:i--lnitli!i'i-s, 11. ilc. Histoire de la Laura Gerardiac. Mem. Acad. Sci. 



France, xlii. (2), 160 pp. 8 pis., 1883. 



17. Lilljeborg, W. Liriopc et Pcltoyaster, H. Rathke. Nova Acta Soc. Sri. 



I'lisalensis, (3), iii. pp. 1-35, pis. i.-iii., and pp. 73-102, pis. vi.-ix., 1859- 

 1860. 



18. Mi/ 1 1 IT, Fr. Die Rhizocephalen, eine neue Gruppe schmarotzender Krebse. 



\\-\\. Naturgesch. xxviii. pp. 1-9, pi. i., 1862. 



19. Die zweite Entvvickelungsstufe der Wurxelkrebse. Airh. Xaturgesch. 



xxix. pp. 24-33, pi. iii., 1863. 



