274 POLYZOA INFUNDIBULATA. 



specimens with a close resemblance to his principal figure (see Plate 

 XLVI, fig. 3, 4.) ; and I have seen others very exact to those monstro- 

 sities of the species which he has so beautifully pourtrayed. In un- 

 favourable situations T. phalangea assumes sometimes the shape of 

 an irregular wart, on which we may observe the tubes in one place 

 scattered and almost free, and either erect or sub-flexuous ; in 

 another place joined in short rows with apertures that scarcely pro- 

 ject beyond the crust, which has undergone an unnatural develop- 

 ment and thickening. But I have dropt the specific name verru- 

 caria, because I believe Milne-Edwards to be wrong in his synonymes, 

 and because the name has been now applied to so many things as to 

 render its retention unadvisable. 



7- T. FLABELLARis, cTUstaceous, /ansliapecl, adnate ; the 

 poli/pe-tuhes laid horizontally^ rather shorty with a plain entire 

 aperture. W. Thompson. 



Plate XLVI. Fig. 5, 6. 



Tubipora flabellaris, Fabric. Faun. Groenl. 430. Turt. Gmel. iv. 615. — Discopora 

 palmata ? Risso I'Europ. merid. v. 339. 



Hah. On the leaves of the Laminarise on the Irish coast, W. 

 Thompson. 



Polypidom forming a calcareous fan-shaped spot, from one to 

 three lines in diameter, adherent by a thin plane lamella, of which 

 the margin does not jut beyond the tubular cells : these are horizon- 

 tal, sub-alternate, obscurely rowed, sometimes vitreous and trans- 

 parent, at other times opaque and wrinkled. It differs from the 

 preceding in its form, which imitates the " Prince of Wales' feather ;" 

 in the want of a division down the lobes; and in the horizontal dis- 

 position of its tubes, which are also comparatively short, and of 

 somewhat larger bore. 



I owe all my knowdedge of this species to Mr. W. Thompson, who 

 sent specimens to me under the name of Tithulipora phimosa. 

 " It forms," says Mr. Thompson, " a beautiful incrustation, which 

 takes the figure of a feather or of several feathers combined, and 

 is of a dull opaque white colour, except at the margin, where 

 the tubes are somewhat transparent, and delicately tinged with 

 pale lilac. The tubes are transversely wrinkled or ridged, — an 

 appearance which increases more than in a regular ratio as the 

 species approaches a perfect state : the space between the tubes is 

 likewise rugose. None of my specimens exceed one-third of an inch 

 in diameter." — "The delicate, smooth, and somewhat hyaline speci- 



