314 



PART II. SYSTEMATIC ACCOUNT 



cuticle at the tip (Fig. TT133G), and the latter are shaped like small warts or 

 buttons. 



The tentacle is 15 mm long, the fore-part of the body 0-97 mm. The 

 mesosoma is 0-09 mm broad. The preannular section is 9 mm and the post- 

 annular 10 mm long. The overall length of the body, including the tentacle, 

 is 35 mm. 



The thin elastic tube is lustrous, dark brown and thin-walled. The whole 

 front part of the tube is divided into segments which are two or two and a 



c. 



v.. 



k* s 



fe*., 



В 



к 



if.:;- ...,'.'.«•;«»' 



%, • : ■:- 4 



;ij : . • ■■■■ji 



: : "^Й&"#(.-# 



jv.. ! .'.'-?.!sa 



: .'Л -. • ■ viva 

 £:..'■ vi& 



: .'. \ — :-: 





0.1mm 



D 





- yr 



-Vv 





'■■■:'■■■■& 



■»■ 



Г 



К::-'.'.:-:ь 





и&ш 



i'il 





г- 



Fig. UU133. Siboglinum sumatrense: ^-/'-successive parts of the tube. 



