REPORT ON THE POLYZOA. 



39 



remains of a former polypide, and the position so high up is peculiar. There are no 

 ovicells in the specimen examined. 



Habitat.— Stsition 49, lat. 43° 3' N., long. 63° 39' W.; 85 fathoms. Gravel, stones. 



Porina proboscidea, n. sp. (PI. I. figs. 19, 20). 



The zoarium is formed of cylindrical branches nearly in one plane, and bifurcating at 

 a small angle, with zocecia only opening on the one side of the zoarium. Tlie zooecia 

 are often much prolonged, and widen out at the extremity, and frequently tliere are on 

 this projecting zooecial tube either ridges or spinous processes. Below the middle of the 

 zooecium there is a suboral pore with a tubular projection. 



There are small round or nearly round avicularia, both on the anterior and posterior 

 surfaces, and these are usually on the same transverse line as the suboral pore. There 

 are also non-avicularian pits. The ovicell usually occurs near a bifurcation, almost 

 entirely immersed with large pores on the surface. 



The appearance of the zoarium reminds us of FlUsparsa, whereas the zooecial 

 characters are very similar to those of Porina coronata, and I believe this is the first 

 time that Porina has been met with having the zooecia only on the one face. 



The projecting zooecia reminding us of Entalophora jyi'oboscidea, suggested the same 

 specific name which appropriately describes the projecting zocecia. 



Habitat. — Station 23, off" St. Thomas, 450 fathoms. Pteropod ooze. 



I do not know where to place a small specimen from Station 320 (P). III. fig. 47). 

 The zoarium is slender, cylindrical, branched, attached by means of a bundle of radical 

 fibres. Zocecia completely immersed, and the aperture also immersed, with a small 

 triangular avicularium at the proximal edge. Surface with elongate pores. This i\i 

 growth and general character is the same as Bifaxaria abyssicola, but has no large 

 avicularia, and the zooecia are on all sides of the zoarium, though more abundant on 

 what we may in consequence call the front. 



In Lepralia bisinuata, Smitt, the double sinus is only peristomial, and the lower 

 edge of the operculum is straight. 



In Schizoporellajacksoniensis, Busk, the oxncells are immersed, and the ovicelligerous 

 zooecia have the oral aperture wider than the other zooecia. 



MicrojJoreUa coscinopora, var. anaata, Waters, occurs from Station 162, off 

 Moncceur Island, Bass Strait, 38 to 40 fathoms, also SchizoporeUa u-oosteri, MacGillivraj', 

 and Mucronella tricusjns, Hincks. 



Chorizopora brongniartii, Audouin,' also occurs from washing;? of dredge between 

 Fayal and Pico, 50 to 90 fathoms, as well as Mastigopjhora hyndriuoxni, Johnston, and 



' Zool. Chall. Exp., part xxs. p. 148. 



< 



