Natural History of East Finmark. 115 



I have given Hincks's Monoporella spinulifera, var. pr(B- 

 clara, as a synonym, under tlie assumption that he over- 

 looked a deep-seated avieularium, the presence of which, 

 however, appears to be indicated by the umbo-like swelling 

 below the oral opening which he described and figured. 



Taken by the 'Valorous/ 1875, off Holsteinborg, W. Green- 

 land, in 57 fathoms. 



Genus Monoporella, Hincks, 1881. 

 Type, Monoporella nodulifera, Hincks. 



Monoporella spinulifera, Hincks, 



1889. MucroneUa spinulifrra, Hincks, " The Polyzoa of the St. Law- 

 rence," Ann. k Mag. Nat. Ilii^t. ser. G, vol. iii.'p. 4.31, pi. xxi. fig. .'!, 

 and Monoporella spiyiuUfera, vol. ix. p. 152 (but not var. prcsclara). 



Hincks was quite right in making Discopora cruenta, 

 Smitt (but not SchizoporeUa cruenta (Norman)), a synonym 

 of this species, which I have in my collection from the Gulf 

 of St. Lawrence {Whiteaves) ; Greenland, off Holsteinborg, 

 57 fathoms {' Valorous,' 1875) ; and Spitsbergen, lat. 76° 41' 

 N., long. 10° E., in 100-120 fathoms, as ''Discopora cru- 

 enta/' from Smitt ; and other specimens from Spitsbergen 

 named " Porina ciliata, forma dura," from Smitt. I cannot 

 understand how Mr. Waters ('' Bryozoa Franz-Joscf Land," 

 Journ. Linn. Soc, Zool. vol. xxviii. 1900, p. 73) can have 

 reverted again to Smitt's mistaken name, and included 

 Monoporella spinulifera under Lepralia cruenta ; apart from 

 all other differences, the front wall of the former is always 

 entire and imperforated, the latter at all ages of growth has 

 the front wall punctate, its oral opening is quite different, 

 and it never has the little spine-point on the lower lip, which, 

 though so insignificant in size, is a very marked characteristic 

 of spinulifera. 



Cryptic Ocecia. 



I have in this paper described an ooecium in CribriUna 

 cryptooecium which becomes completely covered with over- 

 growth except the frontal arch, and Levinsen {" Studies of 

 Bryozoa,"" p. 12) refers to other species which have what he 

 terms "' ooecia covered by kenozooecia " ; but in all these cases 

 the ooecia are in the early stage on the surface of the zoarium 

 and clearly seen. The character of the ooecia 1 am about to 

 call attention to is entirely different. They belong to species 

 of which no ooecia were previously known, and can only be 

 found bv partial decalcification of the frontal wall, when they 



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