444 



Messrs. Carpenter, Jeffreys, and Thomson [Xov. 18, 



Warm and the Cold area ($ 64), the "tangles" brought op an immense 

 number of tubes usually from § inch to 1 iuch long, and about ^ of an 

 inch in diameter, composed of sand-grains cemented together. These 

 tubes often presented an appearance of segmentation externally ; and they 

 were at first supposed to be a modification of the straight chambered 

 Lituolce obtained on the bank of the Cold area last year, though differing 

 from them in having no definite prominent mouth. On breaking them 

 open, however, it was found that the cavity is not divided into chambers 

 by interposed septa, as in Lituola, but that it is continuous throughout, 

 though traversed in every part of its length by irregular processes built up 

 partly of sand-grains and partly of sponge-spicules, strongly resembling those 

 which have been recently described by Mr. Brady in the gigantic Foramini- 

 feral ibssil Loftusia, and which present their most symmetrical arrangement 

 in the yet more gigantic fossil Parkeria described in the same Memoir by Dr. 

 Carpenter*. These arenaceous processes lie in the midst of the sarcodic body, 

 which fiTs the whole of the cavity without any division into segments, and 

 which communicates with the surrounding medium, at what appears to be 

 the free extremity of the tube, by irregular spaces left between the agglu- 

 tinated sand-grains that form a rounded termination which nearly closes 

 it in. At the other extremity, however, the tube is so uniformly open in 

 the numerous specimens that have been examined, and so generally presents 

 an appearance of fracture, that there seems strong ground for believing 

 that this type ( to which we assign the generic designation Botellina) must 

 grow attached by the lower end of its tube to some fixed base. It is sin- 

 gular that while this fabric presented itself at no neighbouring Station, the 

 "tangles'* broueht up in the comparatively shallow water near Shetland 

 a number of tubes, which, though of somewhat larger size, and having 

 their sand-grains yet more regularly agglutinated, presented so close a 

 general resemblance to our Botellina, as strongly to suggest a similarity of 

 character. This idea, however, was soon dispelled by further examination ; 

 for the tubes, when broken open, proved to be as smooth internally as 

 they were externally, and to be lined by a definite membrane ; in addition 

 to which they were freely open, and their edges rounded off, at what ap- 

 peared to be their last-formed extremity ; so that there remained no doubt 

 that they had been constructed by some Tubicoiar Annelid. — The true 

 chambered Lituolce found last year on the 170 fathoms bank, in the Cold 

 area (' Lightning' Report. § 13), were not met with this year; but mono- 

 thalamous M tests/' closely resembling them in external appearance, \tere 

 obtained in abundance at Station 64. — TVith the exception of these Arena- 

 ceous types, the Foraminifera met with in the Cold area were not remarkable 

 either for number or variety ; and, as compared with their extraordinary 

 abundance in the Warm area S7), were rather "conspicuous by their 

 absence. ,, 



77. The most marked feature in the Fauna of the Cold area was undoubt- 



• Philosophical Transactions, 1-C0. p. 806. 



