98 THE VOYAGE OF H.M.S. CHALLENGER. 



and described an Appendiculariau under the name of Oikoi^leura chamissonis. 

 Whether this species is the same one as that found by Chamisso it is impossible 

 to determine ; and as Mertens was undoubtedly the first to characterise a genus of 

 the Appendiculariidse in a recognisable manner, I have no hesitation in following 

 For in considering Mertens to have the priority with his generic name, and in 

 applying the name A])pendicularia to another genus of the group defined much later 

 by Fol in 1874. As for Chamisso's specific name Jlagdlum, it must, I think, lapse 

 altogether, as no one can say with certainty what his species was. 



Quoy and Gaimard ^ in their description of the animals collected during the voyage 

 of the " Astrolabe," under Dumont d'Urville, formed the genus Fritillaria for one of 

 the Appendiculariidse ; but this genus, like the Appendicularia of Chamisso, is so im- 

 perfectly characterised, that it is impossible to say exactly what form was meant, and 

 therefore it seems best now to use the name, as proposed by Fol, for a well-defined 

 modern genus of the family. 



In 1846, J. Miiller'' described, under the name of Vexillaria flabellum, some speci- 

 mens of an Appendiculariau found in the North Sea. They probably belong to the 

 genus Oikopleura, but the species is not recognisable. 



In 1851, W. Busch found at Gibraltar a species of Fritillaria which he described* 

 under the name of Euryccrcus pellucidus. Fol considers this species the same as 

 Ajypendic^daria furcata of Vogt, and describes it under the name Fritillaria 

 furcata; but if this synonymy be correct, the specific name pellucidus has the 

 priority. 



In the same year (1851) the first of Huxley's important anatomical papers ° on the 

 Appendiculariidse was pu1:)lished. It dealt with the structure of a form found on the 

 coast of New Guinea and in the Southern Pacific, which Huxley regarded as being 

 the same as the subject of Chamisso's original description, and named Appendicidaria 

 fiagellum. Leuckart," C. Vogt,' and Gegenbaur,^ during the next few years, all contri- 

 buted to our knowledge of the group, and described various new species. 



Professor Allman" in 1858 redescribed the "Haus" as observed by him in an 

 Appendiculariau obtained on the coast of Scotland. Many of the previous investigators 

 of the group had not been fortunate enough to find this covering, and AUman's obser- 

 vation of it in April 1858 was the only record of its having been seen since Mertens 



^ Etudes sur les Appendiculaires du detroit de Messine, p. 10, 1872. 

 ^ Voyage de 1' Astrolabe, Zool., tom. \v. p. 304, 1833. 

 " Mailer's Archivf. Anat. u. Phijs., Jahrg. 1846, p. 106. 

 * Beobach. li. Anat., &c., Wirbellos. Thierc, p. 118. 



'"' Phil. Trans. 1851, part ii. ; see also Quart. Journ. Micr. Sci, vol. iv., 1856. 

 •^ Zoologische Untersuchungeu, Heft iL p. 77, 1854. 

 ' 3Iem. de Vlnslit. Genev., tom. ii. p. 74, 1854. 



» Zeitschr.f. tviss. Zool., Bd. v. p. 344, 1854 ; and Bd. vi. p. 406, 1855. 



" Proc. Roy. Soc. EJin., vol. iv. p. 123 ; and also Quart. Journ. Micr. Sci, vol. vii. p. 86, 1859, wl.ere there is a 

 figure given of the Appendicularia in the " Haus." 



