A I. I'M A AXGUINA. 



noticed any approach to the erect mode of growth which 

 characterizes the following species. 



HABITAT. On the smaller Algae chiefly, and especially the 

 red kinds, occasionally on shells, stones, &c., in tide-pools 

 and in the Laminarian region *. 



LOCALITIES. Very abundant in the south and west, less 

 common apparently in the north of England, rare in 

 Shetland. Coast of Ireland ; Isle of Wight (W. T.) : Ayr- 

 shire (Landsborough) : south coast of Durham occasionally 

 (J. Hogg) : Shetland (C. W. P.) : Ramsay, Isle of Man ; 

 Filey, Yorkshire; Llandudno; Swanage; Ilfracombe; 

 South Devon, most abundant ; Guernsey (T. H.) : Corn- 

 wall (Couch) : &c. 



GEOGRAPHICAL DISTRIBUTION. Bahusia; Southern Nor- 

 way (Smitt) : Atlantic Ocean ; Antarctic Ocean ; Tasmania 

 (Busk) : Adriatic (Olivi) : Biarritz (W. T.) : Zanzibar ; 

 Natal (W. Gates) : Glenelg (T. H.). 



Ellis's quaint account of this interesting form is worth 

 reproducing: "From very small holes in the broadest part 

 of this irregular winding tube [which he had just described] 

 there arise here and there small testaceous white hollow 

 figures, exactly resembling a snake without the lower jaw, 

 in the place whereof is the entrance into the cell." His 

 figure is admirable, and leaves little room for improve- 

 ment to those who come after him. 



The area in this species occupies the underside of the 

 curved portion of the cell ; and at the top of it is the mouth ; 

 the opercular valve falls, like a little trap-door, when the 

 polypide is about to issue from its cell, and is drawn up and 

 tightly closed after it when it retreats. The tube below 



* " Invest* those Algae chiefly whose stems are clothed with hair-like 

 fibres, as Daxya coccinta, Griffitkria tquittt (folia, and Spkactllaria xoparia ; 

 but found occasionally on siuooth-ttteiniued species, as Plvcamium cocctMWN." 

 W. THOMPSON. 



