240 NATURAL HISTORY OP 



and resembles the preceding' in mode of growth — 

 usually extending in single linear series. " The zooecia 

 are connected like a string of bugles ; the cells are 

 oval, but widest and roundest at the top." — Johnston. 

 Dr. Landsborough, in describing a specimen obtained 

 by him, says that it covered about three inches of a 

 shell in length, and about an inch and a half in breadth. 

 The cells are sometimes marked with parallel lines. 



4. M. PiLOSA, Linn. Plate XIX. fig. 6. 



Flustra pilosa [Linn., E. and S., Lamk., Lamx., Grant, 

 Lister, Mull., Bosc, Flem., G. J., De B.), Eschara pilosa 

 [Pall., Moll.), Flustra dentata [E. and S., Mull., Lamk., 

 Lamx., Bosc, Be B.), F. lineata {Esper), Membranipora 

 stellata {Thompson), Annulipora pilosa [Gray), A. den- 

 tata {Gray), E-eptelectrina pilosa {D'Orh.), R. dentata 

 {D'Orh.). 



Hab. : Very common. 



This very common but very beautiful zoophyte is 

 the " Irregular Spongy Foliaceous Coralline " of Ellis 

 (Cor., 73), who refers to it as "this common sea insect's 

 cell.''^ In appearance it often seems to cover the fi'onds 

 of algae with a silver incrustation, and under the lens 

 the individual cells are seen to be most curiously 

 wrought. The cells are placed either side by side or 

 alternately, and are long and dotted all over with oval 

 discs. A long spine usually proceeds from just below 

 the orifice of each cell, which is also guarded by from 

 4 — 12 marginal spines sometimes bending over the 

 cell. 



The zooids of this species possess a curious interten- 

 tacular organ, which is oblong, and placed between the 

 base of two of the tentacles, and attached to the ten- 

 tacular ring. It is lined and surmounted with cilia. 



