front the Sjith Sea and adjacent jHir Is. 



2:)'^ 



tlnce tjikcii at Station 40 \\ liii<l an external coating conij)os('(l 

 of liroken picct'S ol Hydroiiis — ni(i>tly (Jlnlia and Sertularin 

 — Miiiali pc'cten-valvfjii, C(>ar<«' s.ind, an<l pieces of gravel. 

 Tlu>se obtained in S.igna Fiord were quill-like, ami were 

 taken along with Nephtliydidji?, P]iinicida', and Maldanid:e. 



Sornetinies tubes are obtaineil showing forked branching, 

 an a|)pearance which is due to a fracture of the tube, and the 

 continuation of the latter, not by the union of the broken 

 ends, but by the secretion of a new piece Miih which the 

 tunnel i.s continuous. The broken fragment has its channel 

 closed, and it remains adiien-nt ;ipparently as a useless j)io- 

 cess. Prof. M'lntosh says, '* this occurs both anteriorly and 

 pesteriorly, as tubes are found with a diaphragm in each 

 limb of the fork. The bifurcation is thus only apparent, not 



actna 



" * 



Tliis genus is represented in the 'Challenger' collection by 

 a new species called I hyllochcttopterus claparedii. 



Genus Spioch^ETOPTEUUS, Sars. 



Several tubes belonging to this genus were found in the 

 follow iui; hauls : — 



The tubes are all sizes and some are coated with fragments 

 of small shells, valves or minute pectens, coarse sand, and 

 gravel. Some, however, have a thick j)a|)er-like constituency 

 and are very wide in bore. If the fragments of shells etc. be 

 |)icked off or dissolved away, the internal portion of the tubes 

 is yellowish and hyaline in character ; but in the paper-like 

 tubes no trace o£ tiie hyaline character is visible. None of 

 the tubes show tiie valvidar condition. 



In the ' Challenger' Expedition several yellowish hyaline 



* \'idc ' Cballfuper ' IJeport, vol. xii. p. u70. 



