214 NATURAL HISTORY OP 



Ai'ran (HincJcs), Guernsey^ Antrim, Shetland {A. M. 

 Norman) . 



This species is larger than the preceding, and is 

 distinguished by the absence of the snake-like head ; 

 the zocecia being straight and erect. 



3. A. TRUNCATA, Landshorough. 



Anguinaria truncata {D. L.), Salpingia Hassallii 

 {Coppin, McA.). 



Hab. : Lamlash Bay (D. L.), Isle of Man, Ilfracombe 

 {T.U.). 



Zooecia straight, with truncated extremity. Cells 

 usually simple, but occasionally arranged in a series, as 

 in Eucrntea. A short tube-like process springs from 

 the back of each cell. 



Dr. Landsboroagh seems to have felt the true 

 naturalist's glow of pleasure at the discovery of this 

 species, which he first saw when " he had the pleasure 

 ot a day's dredging in Lamlash Bay with Prof. Balfour 

 and other friends. He observed that a large frond of 

 Laminaria was roughened with little bristles. On 

 reaching home he found that the little bristling tubes 

 which had attracted his attention, were not distinct 

 polypidoms, but little tubular pores springing from a 

 fistular fibre which ran in an irregular line along the 

 frond. The upright pores were like a small quill cut 

 across, and then a longitudinal slice cut off towards 

 the top, as in the first step in the process of making 

 the quill a writing pen " (Pop. Hist, of B. Z., 288). 



A peculiarity of this species is, that many of the 

 cells have an appendage, like a long tube, springing 

 from the back of them, called the " dorsal tube." 



