SERTULARIAD.E : SERTULARIA. 



69 



Fig. 10. 



r 



brown colour, from which it derives its specific name ; but to see it 

 in all its beauty it must be examined in a living state, and soon 

 after it is taken from the sea ; when, instead of being black, it will 

 be found of a beautiful and delicate pink, and in some instances of a 

 deep arterial blood colour. It is the stoutest and most rigid of all 

 our native Sertulariag, but there are several others which exceed it 

 in beauty and delicacy." R. Q. Couch. 



7. S. PINNATA, pinnate, reddish-brown ; cells subalternate, 

 tubular, adherent, with a plain rim ; vesicles unilateral, rather 

 small, the top surrounded with a series of denticles. Pallas. 



PLATE XII. FIG. 3, 4. 



Corallina abietis forma, Bast. Opusc. Subs. i. 41, tab. 1, fig. 6 (bad). Sertularia 

 pinnata, Pall. Elench. 136. S. fuscescens, Turt. Gmel. iv. 677. Turt. Brit. Faun. 

 213. Lamour. Cor. Flex. 195. 



Hob. " Oceanus ad Prom. Lacertse, Cornubiae," Pallas. Coast of 

 Devonshire, Mrs. Griffiths. 



I am indebted for a good specimen of this species to Mrs. Griffiths, 

 who mentions that, when fresh, it was entirely deep blood-red. 

 When dried it is a clear dark brown, with many pinnules of the 

 usual light horn colour. There is the closest resemblance, 

 " affinitas summa," as Pallas expresses it, between it and S. nigra, 

 which it equals in size, but is a little slenderer. The real distinc- 

 tion between them lies in the position of the cells, and in the form 



