358 THE PLANKTON OF THE FAROE CHANNEL AND SHETLANDS. 



verticil of four (rarely five) thin and rather long divergent branches, 

 slightly curved. Each terminal branch ends in a cushion carrying 

 four or sometimes five very small teeth. 



Length of the tubes, 'SS mm. ; breadth in the middle, "08 mm. The 

 length of the terminal branches varies ; some are thick and stout, 

 others longer and thinner, five to ten times as long as broad. 



This Eadiolarian bears considerable resemblance to Haeckel's Aul. 

 tctrancista and hexancista, both of which are Pacific deep-water 

 forms. 



]\Iy specimen was taken at 400 fathoms in the Faroe Channel, and 

 is probably to be regarded as a North Atlantic variety of Aulogrcq^his 

 tctrancista, from which it differs slightly. 



AuLODENDRON BORE ALE, n. sj). Plate I., Figs. 4, 4a, 4b. 



A Phfeodarian was captured at 400 fathoms, which, though very 

 much broken and injured, showed some characters distinct enough 

 to enable it to be placed in Haeckel's genus Aulodendron ("Aulocanthida 

 with a veil of tangential needles, and inter-radial tubes which bear 

 numerous irregularly scattered lateral and terminal branches." — Chall. 

 Bty., p. 1588). 



The calymma measured 2-5 mm. across ; was covered with a veil 

 of stiff, straight, tangential needles unbranched and not anastomosing, 

 but of considerable thickness, the needles measuring in width -01 mm. 



The radial tubes, which were irregularly scattered, were very 

 numerous, straight, of fairly equal thickness throughout their length, 

 tapering only slightly or not at all at the proximal end (Fig. 4a), but 

 at the distal end having a constriction below the verticil, which formed 

 a rounded knob bearing in some four, in a few others six slightly 

 curved branches, widely divergent, about •055--060 mm. long, and 

 thin (Fig. 4). 



In the outer half of the radial tubes branches were given off at 

 irregular intervals, generally alternate, but often two on one side 

 close together. These branches are short and carry a forked or slightly 

 denticulate knob at the extremity (Fig. 4b), and of about the same 

 length as the branches of the verticil. Generally there were twelve 

 lateral branches, all of about the same length. Often they are again 

 branched, the terminal twigs being very small. The length of the 

 radial tubes was very variable, averaging about '12 mm., and the width 

 was similarly variable, some not being more than half the width 

 of others, but averaging '02 mm. The proximal ends of the tubes lie 

 centrally over the pha^odella, which is very copious. 



The animal, while being undoubtedly an Aulodendron, is difficult 



