BRTOZOA FROM NEAR CAPE HORN. 



247 



DiASTOPORA CONCINKA, MacGilUvrciy. 

 , Tubulipora concinna, MacGill. Trans. Roy. Soc. Vict, vol, xxi. (1885) 

 p. 94; pi. 1. fig. 10. 



Growing on Aspidostoma giganteiom, Busk, the zoaria are at 

 first flabelliform, and then become circular in older stages. 



The zooecial tubes are small, free, projecting, perforated all 

 over, and no closures with tubules are seen. The ovicell is a 

 small round inflation, with the ovicellular tube turned back 

 towards the centre of the zoarium, but without a funnel in the 

 specimens examined, whereas in what I have considered to be 

 D. latomarginata^ d'Orb., from Capri it is very marked. 



The divisional lines between the zooecia are very distinct, and 

 the internal diameter of the zooecia is about 0*06 mm. 



Probably this is what has sometimes been called D. lato- 

 marginata, d'Orb., though the ovicells usually spread more 

 laterally in _D. latomarginata, and there are tubules to the 

 closures, and it may therefore be better to suspend judgment as 

 to the identity of the two. 



Hab. Victoria ; New South Wales. Cape Horn, Station un- 

 known. 



Entalophora pROBOsciDEA (M.-Edioards). 

 For synonyms see Miss Jelly's Catalogue, and 



Entalophora prohoscidea, Waters, Exped. Antarct. Beige, Bryozoa, 

 p. 91, pi. 9. figs. 4 a, b. 



There are only a few small piecef3 of this cosmopolitan species 

 from Station unknown. 



Entalophora. regulabis {MacGillivray) . (Pi. 29. figs. 10-14.) 

 Pustulopora regularis, MacGill. Descr. of new Polyzoa, pt. iv., Trans. 



Roy. Soc. Vict. 1882, vol. xix. p. 292, pi. 1. fig. 3 ; Busk, Zool. Chall. 



Exp. vol. xvii. pt. 50, p. 21, pi. 4. fig. 2. 



Sections of decalcified material have been cut, showing in 

 nearly all zooecia thick membranous transverse walls, situated 

 distally to the polypide, and not more than one has been found 

 in any zooecium. At first these walls or tabulae are slightly 

 curved, but later various forms are assumed, and the wall then 

 rises up in the middle, so that sometimes a closed chamber is 

 formed ; in others there is an opening, and then apparently the 

 tentacles can pass through, though the aperture is not very 

 large. 



