278 CANON A. M. NORMAN ON THE POLYZOA 



Stomatopora GRANULA.TA (H. M.-Edivards). J. 



1897. Alecto simplex, J. Y. Jolmson, "New Cyclostomous Bryozoa found at Madeira," 



Ann. & Mag. Nat. Hist. ser. 6, vol. xx. p. 60. 



I have examined Johnson's type, and have found specimens of it in deep 

 water, but can see no specific difference from S. granulata. 



TuBULiPORA APERTA, Havmer. 



1898. Ttihuliiwra aperta, Harmer, Quart. Jour. Micr. Sci. new ser. vol. xli. p. 101, pi. 8. 



figs. 2, .3. 



A single specimen only obtained, which appeared to be this species, but to 

 make certain I sent it to Dr. Harmer, who confirmed my identification. 



TUBULIPORA DRUIDICA, Bush. B. 

 1859. Tuhuli'pora ch-uidica, Busk, Quai't. Jouru. Micr. Sci. vol. vii. p. 07, pi. 22, fig. 9. 



I have been unable to find the type specimens of this species. I leave it 

 in luhulipora^ as placed by its describer ; but it can scarcely belong to that 

 genus as now understood. 



Idmonea liliacea (Pallas). 



This is /. serpens of authors. Dr. Harmer has placed it in Ttdmlipora. 

 It is not uncommon at Madeira. 



Idmonea atlantica, E. Forhes. B. (PI. 33. figs. 1, 2.) 



Two or three small specimens in deep water, A portion of one of these is 



figured for comparison with the species which follow and to show the 



ocecium. 



Idmonea Meneghinii, Heller. (PL 33. figs. 3-5.) 



1867. Idmonea Meneghinii^ Heller, Brj-oz. Adriat. Meeres, p. 44, pi. 3. figs. 6, 7. 

 1880. Idmonea Meneghinii, Waters, " Ovicells of Cyclostomous Bryozoa," Linn. Soc. 

 Journ., Zool. vol. xx. p. 278, pi. 14. fig. 2. 



The Idmonea which I here name /. Meneghinii is certainly figured very 

 badly by Heller, but a comparison with a small fragment received from him 

 at the time of the publication of his memoir establishes the identity with 

 certainty. As developed at Madeira it is an elegant and beautiful form. 

 It consists of very slender branches, the lower portions of which scarcely 

 exceed \\\e upper in breadth, which is usually less than half a millimetre. 

 The growth of the whole zoarium has an upward tendency, and the division of 

 the branches is usually at a very acute angle. The cells are generally arranged 

 two or three together, and their lower portion, which is united with the 

 branch itself, is strongly arched, while their apices are projected at the sides 

 almost at a right angle ; the free portion is short, generally not exceeding- 

 half the diameter of the branch. The frontal surface is sparingly punctured ; 



