The Echinoderm Fauna of South Africa. 417 



If Ludwig and von Marenzeller are correct in assigning Pallas' 

 Actinia doliolum to the genus Colochirus, instituted by Troschel in 

 1846, there is no doubt that the genus must be called Pentacta, for 

 Goldfuss established Pentacta for Pallas' species alone; at least it is 

 the only species named. Pentacta has usually been considered a 

 synonym of Cucumaria, but there seems to be no good reason for 

 such an opinion unless doliolum is a Cucumaria. And, as already 

 stated, von Marenzeller long since' (1874) showed it was a Colochirus 

 and this view has been strongly confirmed by Ludwig (1887). Pen- 

 tacta therefore simply replaces Colochirus. 



PHYLLOPHORUS FRAUENFELDI. 



Ludwig, 1874. Arb. Zool.-Zoot, Inst. Wiirzburg, vol. II, p. 95; 



pi. VI, fig. 22. 



Among the specimens before me which suffered much from des- 

 sication is what must have been a very fine example of this Red 

 Sea species. The tentacles are -well expanded and show distinctly 

 the following asymmetrical arrangement: 3 large, 1 small, 4 large, 

 1 small, 3 large, 1 small, 2 large, 1 small, 3 large, 1 small. It has 

 long been known that individuals of this genus show so much diver- 

 sity in the relative size and arrangement of the tentacles that neither 

 generic nor specific distinctions can be based thereon. The calcareous 

 rods of this species are very distinctive, except that they are so 

 suspiciously like those of Urodemas ehrenbergii Selenka, which is also 

 a Red Sea species, that the identity of the two forms seems highly 

 probable. But Selenka speaks of a peculiar arrangement of the rods 

 in trios, which is not evident in the specimen at hand. This specimen 

 has the label: Natal Coast. Dr. J. D. F. Gilchrist. 



PSEUDOCUCUMIS AFRICANA. 



Cucumaria africana Semper, 1868. Holothurien, II heft, p. 53, pi. XV, 



fig. 16. 

 Pseudocucumis africana Ludwig, 1888. Zool. Jahrb. Abt. Syst., vol. Ill, 



p. 815. 



There are two specimens in the present collection of this wide 

 spread Indo-Pacific species. They are in a bottle with labels indi- 

 cating both Natal and Mozambique (coll. K. H. Barnard) as the 

 locality. Probably the latter is the correct one. 



