40 Miscellaneous. 



repetition of that of the Aphro ditacece. Their feet are simple rami, 

 which have no relation to the limbs of the Arthropoda. 



It must, howcAer, be admitted that the reproductive organs of the 

 Myzostoma diflFer considerably from those of the true Annelids. 

 Leaving out of consideration their hermaphroditism, which occurs 

 also among certain polychsetous Annelids, the existence of a cloaca 

 deserves to be especially indicated. 



The deferent canals are also exceptional, at least unless we com- 

 pare them with the segmentary organs of those Cheetopoda which 

 have only a single pair (Parthenope). The existence of ventral 

 suckers is a peculiarity of little importance, and in accordance with 

 the conditions of parasitism. Moreover a sucking-disk is met Avith 

 in the Leucodorce among Chsetopoda. — Zeitschr. filr wiss. Zool. xvi. ; 

 Bibl. Univ. 1866, Bull. Sci. p. 153. 



On the Synonymy and Geographical Distribution o/ Jussisea repcns 

 {Linn.). By C. Martins. 



Having for the last four years cultivated one of the species of 

 Jussicea under the most varied conditions of dryness and moisture 

 and shade and light, I have been able to demonstrate how the form, 

 the size, the pubescence of the leaves, the size of the flowers, and, 

 indeed, the entire habit of the plant were subject to vary. After 

 having familiarized myself with all these forms, I consulted the her- 

 baria, and personally visited those of the museum and of MM. De- 

 lessert and Cosson at Paris, of Delile and Cambessides at Montpel- 

 lier, and of M. de Candolle at Geneva. Dr. Hooker, at my request, 

 was good enough to go through that of Kew, and M. Boissier that 

 which he possesses at Geneva. From this examination it results 

 that Jussicea repens, described by Linne in 1747*, has since received 

 twelve different names : namel}', J. adscendens, Linn. ; J. diffusa, 

 Forsk. ; J. grandiflora, Mich. ; J. peploides, H, J. Kunth ; J.ffuvialis, 

 Blume ; J. ramulosa, De C. ; /. swartziana, De C. ; J. stolonifera, 

 Guill. et Per.; J. alternifolia, E. Meyer; J.australatica, Ferd.Miill.; 

 and J.fluitans, Hochst. 



I am not the first botanist who has perceived that some of these 

 names do not represent species, but simple varieties. Linne, De 

 Candolle, Sir William Hooker, Schiede and Ehrenberg, Torrey and 

 Asa Gray, Hasskarl, Miguel and Grisebach each united some of 

 them, but without regarding them all as mere modifications of one 

 and the same specific type. 



This multifarious synonymy has nothing extraordinary in it ; it 

 may be explained by the immense area which JussicBo repens occu- 

 pies on the surface of the globe, as much as by the variability of its 

 form, every botanist hesitating to recognize an Indian species in an 

 African, American, or Australian plant. This great extension jus- 

 tifies the law laid down in the first place for Lapland alone by Linnef , 

 and since extended to the whole world by A. de Candolle ;f — namely, 



* Flora Zeylanica, p. 75, f Flora Lapponica, Prolegomena, § 31. 



X Geographie botanique, p. 1005. 



