1893.] TROM FUXAPCTI AXD ROTUMA. 8J3 



the port of that name iu S. Australia it would extend its lange 

 into Ortmann's Antarctic littoral region, although Ludwig does not 

 include the species in his list of Antarctic Holothurians. 



One specimen, 140 mm. X 32 mm., from outer reef, Funafuti : 

 colour uniform brown ; the dorsal appendages distinctly more 

 papilliform than the ventral ; deposits typical ; Cuvieriau organs 

 present. 



Dendrochieot.i:. 



PsEUDOcucuMis AFRiCANA Semper. (Plate LIII. iig. 5.) 



Cucumaria africana C. vSemper, Reisen im Arch. Philipp. Bd. i. 

 Hoi. p. 53, Taf. xv. fig. 16 (figure inaccurate, v. Ludwig, 1888). 



Cucumaria asdmilis Bell = ft. theeli, Ludwig = Ps. africana 

 Ludwig. 



For juore detailed synonymy, v. E.. Koehler, Eev. Suisse de Zool. 

 iii. 1895, pp. 276, 277. 



References. H. Ludwig, Arb. a. d. zool.-zoot. Inst, in Wiirzb. 

 1875, p. 90, fig. 17 {Ps. acicula). 

 F. J. Bell,Proc.Zool.Soc.l884,pp.253-258(^w^>/i?r(/ch/s 



japonicus). 

 K. Lampert, Die Seewalzen, 1885, pp. 254, 255 {Ps. 



H. Ludwig, Zool Jahrb. Syst. ii. 1887, pp. 25-27 (Ps. 



intercedens). 

 H. Ludwig, Sitz. k. Ak. d. Wiss. Berlin, 1887, Heft ii. 



pp. ] 236-1 241, figs. 12-16 (Ps. theeli). 

 H. Ludwig, Zool. Jahrb. Syst. iii. 1888, pp. 815-817 



(Ps. africana). 

 H. Ludwig, Bronn's Klassen, Bd. ii. Abth. 3, Buch 1, 



1889-92, p. 95, figs. 11, 12, and p. 348. 

 W.- Bateson, Materials for Study of Variation, 1894, 



pp. 432-435. 

 H. Ostergren, Zool. Anz. Bd. xxi. 1898, p. 135. 

 The genus Pseudocucumis was first defined by Ludwig (I. c, 1875) 

 on the single species Ps. acicula, and with a few alterations, 

 necessitated by the subsequent description of other species, this 

 definition was used by him iu Bronn's ' Klassen ' (I. c. p. 348) to 

 include the genus Amphicyclns Bell. 



Distribution. The genus, of which five species are known, is 

 recorded from the circumtropical Indo-Pacific region, and from the 

 west coast of Norway. Ps. africana has been recorded from as 

 far W. as Zanzibar to as far E. as Fiji. 



Seven specimens from Eotuma, averaging about 22 mm. X 9 mm. 

 I have nothing to add to Ludwig's full and accurate description 

 (1887, 1. c, Ps. thedi), except to record certain variations in 

 tentacular symmetry which appear to me of interest, especially iu 

 relation to the arrangements occurring in other species of the genus. 

 Ps. mixta Ostergren has 5 pairs of larger alternatiug with 5 pairs 

 of smaller tentacles ; the latter are radial in position and vary in size ; 

 they seem from Ostergren's description to be arranged in bilateral 



