Polyzoa. 289 



LICHENOPORA CANALICULATA. 



1«7'J. Discoporella canaliculata. Busk. Phil. Trans., Vol. CLXVIIL, p. 199, 



PI. X., figs. 12-14. 

 1889. Lichenopora canaliculata. Jelly, Syn, Cat. Mar. Bryozoa, p. 134. 



The specimen forms a circular disc, 3 '25 mm. in diameter. In 

 the centre is a space clear of zocecia and with the cancelli closed, 

 but with a thin walled expanded funicular spout — the orifice of the 

 ocecium. 



The orifice in complete cells is bi-denticulate, and the fillet, 

 which is a well-marked feature on the type specimen from Kerguelen, 

 is here often reduced to a mere ridge. 



Localitij.—Osi^Q Adare, 8 fathoms, encrusting seaweed. 



Distribution. — Kerguelen Island ; Cape Adare. 



ALCYONIDIUM FLABELLIFORME. 



Zoarium forming a flabelliform bilaminate expansion, spreading 

 out from a short sub-cylindrical stem. Colour olive-brown. Texture 

 soft and fleshy ; surface smooth. Zocecia polygonal, about • 75 x 



• 55 mm., in circular groups, each group being composed of six or 

 seven zocecia arranged concentrically round a small central zoo^cium 

 0*2 mm. in diameter. 



Locality. — Cape Adare; washed up on the beach. 



The new species is nearly related to A. fiustroides (Busk), 

 obtained by the ' Challenger ' from Station 142, south of Cape of Good 

 Hope, 150 fathoms. In both species the zoarium is bilaminate, but 

 the form of the colony in each case is very different ; again, in 

 Busk's species the zocecia are much more elongated and are arranged 

 in irregular longitudinal lines. 



The soHtary specimen is 1-4 cm. in height, 12 cm. in breadth, and 



1 to 1 • 5 mm. in thickness. The stalk is 1 cm. in height and • 9 cm 

 in diameter. The surface, which is probably quite smooth in the 

 living animal, is much wrinkled by the action of alcohol. The 

 margin is rounded, but deeply incised in three places, thus giving 

 rise to two smaller laminae growing in nearly the same plane as, and 

 partly apposed to, the main lamina. On holding the specimen up to 

 the light the zocecia and " brown bodies " are clearly visible. The 

 orifices of the zooecia are flush with the general surface, and barely 

 distinguishable. The tentacles appear to be about fourteen in 

 number. 



U 



