OF THE MEEGUI ARCHIPELAGO. 



27 



I associate with this species the name of my lamented friend 

 W. A. Forbes, who was for several years the Prosector of the 

 Zoological Society of London. 



4. Cucumaeia assimilis, n. sp. (Plate II. fig. 4.) 



A true Cucumaria of small size, irregular cask-like shape, soft 

 integument, suckers arranged in zigzag or in irregular rows. 



Differs from C. leonina in being of a slate-colour, the suckers 

 darker, in having the spicules without projecting processes and 

 stouter (PL II. fig. 4), and in not, so far as one is able to 

 judge from the single specimen dissected, having long genital 

 tubes. 



The species would appear to be most closely allied to C. leonina, 

 the spiculation being most similar to that of Semperia syracusana. 

 Length 33 ; 25 millim. Greatest breadth 14*5 ; 7 millim. 

 Elphinstone Island. 



5. Sempeeia, sp. 



There are several specimens of a species of this genus, but the 

 characters are, it seems to me, those of young and not of adult 

 specimens, and it is therefore impossible to exactly assign the 

 species to its proper place. It will, I think, be found to be a 

 form that will exhibit interesting modifications during growth. 

 The idea suggested itself to me, but did not commend itself, that 

 the specimens in question are the young of Cucumaria Forbesi. 



Elphinstone Island. 



6. Ocnus javaistcus, Sluiter ; Lampert, p. 129. — Palaw Bay. 

 This species, hitherto known only from Java, seems to be fairly 



abundant at Mergui ; I have little doubt that the single speci- 

 men of Ocnus, whose specific position I was . unable to identify 

 when writing the Report on the Echinoderms of the ' Alert ' 

 Collection (see Brit. Mus.Eep. 'Alert' Coll. 1884, p. 147), belongs 

 to Skater's species ; in which case, as the ' Alert ' found it at 

 Port Darwin, it will be widely distributed. 



7. Thtone sacellus, Selenka ; Lampert, p. 154. — Elphinstone 

 Island. 



8. Stichopus chloeonotus, Brandt ; Lampert,]). 107. — Elphin- 

 stone Island ; a single specimen in very bad condition. 



9. Bohadschia aegtjs, Jaeger ; Lampert, p. 87. — Elphinstone 

 Island ; there was but one specimen of this common species. 



3* 



