62 EXPÉDITION ANTARCTIQUE BELGE 



This of course belongs to the Smittiadœ, but whether to the group known as Porella, 

 or to a group distinguished by the inflated avicularian chamber, is somewhat doubtful. Busk 

 figured the opercula and mandibles, which he curiously thought proved the species to belong 

 to Lepralia, and not to Porella, whereas in reality the operculum is of the Smittia type. 



The surface of the zoœcium and of the ovicell is smooth, or very faintly granular with 

 the zoœcia much raised, but without any dividing ridges between them. There are four oral 

 spines and the peristome is a little raised at each side. 



In a spécimen collectée! from Cape Adare, by the Borchgrevink Antarctic Expédition, 

 the peristome is much more raised at the sides, but this I do not find in my spécimen from 

 Western Port, nor from New Zealand. The Cape Adare spécimen lias an umbo on the ovicell, 

 but on none do I find radiating lines on the ovicell. 



This species passes gradually from quite smooth to granular. 



Habitat. — Victoria (MacG.) ; Bass's Straits (H.); New Zealand (\V. and Ham.) ; 

 South America (B.) ; Cape Horn (Wat.) ; Cape Adare ; Falkland Island 12 fathoms (20 met.). 

 Fossil : Muddy Creek and Waurn Ponds (\*ictoria) ; New Zealand. 

 Exp. Antarct. Belge. 



N° 5g6, Tangles VII. Eat. yo° 23' S.- Long. 82 47' W. ; 480 met. ; +0.8 C. 

 X° 623 on shells, Tangles VIII. Lat. 7o°oo' S.- Long. 80048' W. ; 5oo?met.; +o.g C. 



Smittia reticulata (MacG.) 



Smittia reticulata Okt.maxx. Japanische Bry., Arch.f. Naturgtsch., 1S90. vol. I. p. 44. pi. III, fig. 24; Waters, 

 Ami. Ma:;. Xat. Itist. ser. 6, vol. IV, pi. III, fig. 22; Lkvixsex. Danske Dyr., p. 70, pi. VI, fig. 5-9; 

 MacGillivray, Tert. Polyzoa Yict., p. 93, pi. XII, figs 20, 21 ; Andersson, Bry. Schwed. Exp. (Zool. 

 Jahr., vol. XV, p. 5 44 . 



Eor other synonyms see Miss Jelly's Catalogue. 



A spécimen from 99 1 has the avicularia slightly longer than is usual in European 

 S. reticulata. From 61 3 there is a voung colony (consisting of four zoœcia, starting from a 

 primary zoœcium bearing 8 spines) which is probably S. reticulata. 



Habitat. — Arctic, European seas, Médite rranean, Atlantic, Japan, Victoria, New 

 Zealand, Patagonia, Mauritius. 



Fossil : Pliocène of Europe. Victoria. 



Exp. Antarct. Belge. 



N° 991, Swab. VIII. Lat. 70 00' S.- Long. 80" 48' W. ; 5oo ? met.; +0.9 C. 



Smittia marionensis (Busk) var. 



(PI. VIII, fig. 8) 



Lepralia marionensis Busk, Brit. Mus. Car., p. 67, pi. XCVI, figs. 1-2. 



Smittia marionensis Busk, Zool. Chall. Exp., vol. X. pt. XXX. p. 1.S2. pi. XVIII, fig. 6. 



There are some colonies considered to be this species, in which the surface of the 

 zoœcium is perforated ail over, and the avicularium immediately below the peristome is 

 sometimes quite small (as figured), in others it is much longer, but also with a relatively long 

 mandible slightly rounded at the end. 



