MARINE POLYZOA. 83 



Forms a very closely adpressed crust on the outside of a small 

 univalve shell. 



42. LEPRALIA MALUSII. PL CIII. figs. 1, 2, 3, 4. 



Cells ovate, frequently truncate at each end ; front, especially 

 round the margin, punctured with numerous stelliform pores ; a 

 central lunate pore ; mouth rounded above, straight below, some- 

 times armed with three to four oral spines, sometimes forked. 

 Ovicell smooth, sometimes porcellanous, grooved around the 

 upper border, adnate to the front of the cell above. 



Eschara Malusii, Audouin, Expl. i. 239 ; Savigny, Egypt, pi. 8. 



fig. 8. 

 Cellepora Macry, W. Thompson, Ann. fy Mag. Nat. Hist. x. 20 



(not Chiajel, nor M.- Edwards). 



Lepralia biforis, Johnst. Hist. Brit. Zooph. ed. 2. p. 314. 

 Herentia biforis, Gray, List Brit. Rad. p. 123. 

 Hab. Start Point, J. S. Bowerbank. Killinchy, Co. Down, W. 



Thompson. Roundstone, id. S. Patagonia, 48 fathoms ; T. 



del Fuego; Falkland Islands, Darwin. New Zealand, Dr. 



Lyall, R.N. On shells, stones and fuci. 



As there can be no doubt of the identity of this species with 

 that figured by Savigny, I have thought it right to apply Au- 

 douin's name. The species is so peculiar as to require no addi- 

 tional observations, unless it were to draw attention to the un- 

 certain occurrence and form of the oral spines in it. The ovi- 

 cell in the South American forms is of a brownish hue ; and in 

 all the specimens from that region the cells appear to be much 

 larger than in the more common European form. The cells ad- 

 here to the object upon which the Lepralia is placed by means 

 of a central flattened disc, and not by the entire surface (PI. CIII. 

 fig. 3). 



43. LEPRALIA GRANIFERA. PI. LXXVII. fig. 2. PI. XCV. 



figs. 6, 7. 



Cells ovate or elongated, walls usually thin and vitreous, with 

 rare punctures, particularly round the margin ; an umbo a short 

 distance below the mouth, sometimes wanting, and above that a 

 minute round pore ; mouth crescentic above, straight below, un- 

 armed. Ovicell globose, raised, punctured. 



Var. a. cornuta. A conical ascending process on each side 

 of the mouth. 

 Lepralia granifera, Johnst. Hist. Brit. Zooph. ed. 2. p. 309. t. 54. 



fig. 7 ; Gray, List Brit. Rad. p. 118. 



