150 NATURAL HISTOEY OF ARCTIC AMERICA. 



{E. lobata (Lamx.)=^. Sarsii Smitt, and U. rosacea), both common in the 

 Gulf of St. Lawrence. This genus, with an Escharine growth, has aper- 

 tures much as in Escharina, except that the lateral avicularia are situ- 

 ated within their borders by the side of the sinus. 



Discopora Lam., following Edwards, should be restricted to forms like 

 D. Skenei, with median avicularia, the type of Lamarck being D. verru- 

 cosa, a species closely related to Z>. STcenei, but not the Cellepora verru- 

 cosa of Esper, a very different form, to which Gray erroneously restricted 

 this generic name. 



Celleporella hyalina 'L.'i Gray. 



CeUepora hyalina LiNXifi. 



Mollia hyalina Smitt, op. cit. p. 16, tab. xxv, f. 84, 85. 



Hippothoa hyalina Smitt, Florida Bryozoa. 

 Very common, Annan actook Harbor, 7 fathoms, on Laminar ia, May 

 19, and 9 fathoms, May 20, 1878, lot 570. Penny Harbor, low-water, on 

 Margarita lielicina, October 4, 1877, lot 226. Gravel beach, head of Gulf 

 of Cumberland, May 28, 1878, lot 042, and on HalocyntMa rustica, lot 

 572, May 19. 



