346 ESCHARID^:. 



crystallina. Greenland, lat. 66 S9 7 N., long. 55 27' W., 

 57 fathoms ('Valorous' dredgings) : Bergen (A. M. N). 



RANGE IN TIME. Var. crystallina, Scotch Glacial de- 

 posits (Geikie). 



SMITTIA RETICULATA, J. Macgillivray. 



Plate XLVIII. figs. 1-5. 



LETKALI A RETICULATA, Macgill. Ann. N. H. ix. 467 : Johnst. Br. Z. ed. 2, 



317, pi. Iv. fig. 10: Busk, B.M. Cat. ii. 66, pi. xc. fig. 1, 



and xcii. figs. 1, 2 (not pi. cii. fig. 1). 

 EecHARiNA RIMULATA, If 'Orb. Voy. d. 1'Amer. me>. Polypiers, 15, pi. vii. 



figs. 1-4 (fide Smitt). 



REPTEBCHAKELLA RIMULATA, id. Pal. fran9- terr. cr6t. T. 465. 

 ESCHARELLA LEGENTiLn* forma TYPICA, Smitt, (Efvers. K. Vet.-Akad. Forh. 



1867, Bihang, 10 and 81, pi. xxiv. figs. 50-52. 



Zooecia ovate-elongate, in linear series, separated by raised 

 lines, punctured or strongly areolated round the margin, 

 smooth or slightly roughened, and somewhat raised in 

 the centre ; orifice orbicular, with a thin raised margin 

 and a deeply channelled sinus in the lower lip, three 

 denticles within, the central one the largest ; immedi- 

 ately below the sinus a large avicularium, with acute 

 mandible pointing downwards, sometimes projecting 

 and sometimes immersed; marginal spines three. 

 Ocecia semicircular or globose, prominent, punctured, 

 the elevated peristome in front giving them a hooded 

 appearance. 



Colonies spreading irregularly, and often of considerable 

 size, silvery and bright when fresh. 



The primary cell seems only to differ from the rest in size. 



RANGE OF VARIATION. S. reticulata exhibits many diffe- 



* I do not follow Smitt in adopting Audouin's name, because it seems to 

 me impossible to say with any certainty that Savigny's figure represents the 

 present species, and there is no description to appeal to. 



