frovx Iceland and Labrador. 103 



prominent, glassy, hooded, thickly punctured, frequently with 

 a \x\v\rQ spatulate avicularium on one or both sides of it, placed 

 transversfly. I have not met with this form amongst the 

 lieikiavik diedgings. 



1(). Lej)ralia propinqua, Smitt. (PI. X. figs. 5-7.) 

 Eachara propinqua, Smitt, /. c. pp. 22 & 140, pi. xxvi. figs. 120-128. 



Zoofpcia short, convex, rising towards the very prominent 

 avicularium ; surface warty, sometimes indistinctly areolated 

 round tlie margin, which is bordered by a raised line; 

 mouth ample, arched abuve, witii a broad, very shallow sinu3 

 below ; ])eristome slightly thickened, not elevated, except in 

 the fertile cells ; no central tooth ; avicularia round, stand- 

 ing out boldly below the inferior margin, so as to have the ap- 

 pearance of a prominent beak. Oou^ciinn large, rounded, 

 aduate or subimmersed, sometimes adorned with radiating 

 lines, punctured, the jjores often forming a semicircular series 

 round the outer edge of the ovicell, and a small circular group 

 in the centre ; in the fertile cells the peristome is much elevated 

 at the sides, sometimes rising into large flap-like expansions, 

 but falls away towards the front, where there is a wide opening 

 in which the avicularium is placed. There are frequently 

 spatulate avicularia on each side of the oooecium ; but they 

 differ in shape from those of L. Landsborovii {noimsil) and are 

 inferior in size (PI, X. figs. 7 iS: 8). 



This form seems entitled to specific rank. It exhibits a 

 different type of cell from that of L. Landshorovii {short, ovate 

 or rhombic, and very convea:)] and it also diverges from that 

 species in the character of the oocecium and of the peristome, 

 as well as of the large avicularia. It agrees with L. jJorifera in 

 the absence of the marginal denticle, but wants its porous 

 surface. 



It must be left for further investigation to show whether 

 these forms are so closely connected with each other and with 

 L. Landsborovli, by intermediate varieties, as to constitute truly 

 but one specific group. "With our present knowledge they 

 are properly accounted distinct. 



Smitt refers L. propinqua to his L. (Eschara) verrucosa 

 group ; but its closest affinity is clearly with E. Landiborovii. 



[Spitzbergen, GO fathoms {Mahngren) ; Greenland (Torell) ; 

 Fiumark {LovSn).] 



17. Lepralia reticulato-ptunctata, n. sp. (PI. X. figs. 3&4.) 



Eachardla porifera, forma edentata, Smitt, Forteckn. part iv. p. 9, 

 pi. xjciv. fig. 39. 



