OF MADEIRA AND NEIGHBOURING ISLANDS. 287 



1858. Memhranipora tuberculata, Busk, Quart. Journ. Micr. Sci. vol. vi. p. 126, pi. 18. 



fig. 4. 

 1898. Membraniimra tehuelclia, Waters, " On Membraniporidse," Linn. Soc. Journ., 



Zool. vol. xxvi. p. 674, pi. 48. flg-s. 6-8. 



Specimens of this species are in the Johnsonian collection, and others 

 collected at Porto Santo have been sent to me by Senhor De Noronha. In 

 all cases they are encrusting the Gulf-Weed (Sarc/assiim), especially the 

 round air-bladders, and they would seem to have drifted to the locality where 

 they occurred. 



Mr. Waters would reject Bosc's name on account of insufficient description 

 and a reference to Fhistra dentata, Midler (Zool. Dan.). With regard to the 

 reference, when so little was known in 1802, it is not surprising that it should 

 be thought that any species having spines on the margin might be a synonym. 

 Bosc^s description is: ^' Flustra tuberculata. Incrustee, les cellules ovales avec 

 chacune trois dents et un bourrelet a leur ouverture " ; but it appears to me 

 that the habitat given settles the matter, for he states that it is found " en 

 immense quantite sur les fucus nageans dans I'Atlantique,''' for this species is 

 essentially the Polyzoon of the Grulf Weed. 



Membranipora trichofhora, Busla. B. 



1858. Memhranipora trichophora, Busk, Quart. Journ. Micr. Sci. vol. vi. p. 126, pi. 18. 

 fig. 2. 



The type specimen of this curious species is in the British Museum. Not 

 knowing where to place it, it is here left in Memhranipora. There are in 

 reality six spines on the anterior part of the zooecium, but of the central pair 

 I was only able to see the stumps, while the two lower pair, when present, 

 are of extraordinary length as figured by Busk. The oral bar, as figured by 

 Busk, does not exist, so that the front is truly Membraniporiform. 



Callopora lineata (Linne). B. 



Busk gives this species, without any observation, as Madeiran. I have not 

 seen it. If not again met with, it may be presumed that Hincksina maderensis 

 was the species found. 



Callopora Dumerilei (Audouin). W. 



1905. Memhraiiipora Guernei, J. Calvet, Result. Camp. sci. Prince de Monaco, xxiii. 

 Br^'ozoaires, p. 4, pi. 5. fig. .3. 



I found one small specimen in 1897. 



Crassimarginatella crassimarginata (Biricks). B., B.., W. 



1860. Mevibranipora Lacroivii (?), Busk, Quart. Journ. Micr. Sci. vol. viii. p. 282. 



1861. Memhraiiipora irregularis, Busk, ibid. vol. ix. p. 77, pi. 33. fig. 3 (nee 



d'Orbigny). 



