BRYl iZOA 



South Indian Océan, 6 from the South Atlantic, i from the South Pacifie, only 7 are known 

 from the Northern Hémisphère, ail of which hâve been found fossil ; and of the total 

 Cheilostomata n hâve been described fossil. 



Smittia reticulata MacG. ; Idmonea atlantica Forbes ; Stomatopora incrassata Sm., are also 

 Arctic species, and are cosmopolitan. The Cyclostomata are dealt with later on. 



Jullien described 56 species of Bryozoa from the district of Cape Horn, and it is 

 surprising what a small proportion of thèse are now found, although the distance from South 

 America was not very great, but as stated elsewhere, an examination of the Cape Horn 

 material has increased the number of species known from both localities. Some of the 

 species described by d'Orbigxy in the « Voyage dans l'Amérique méridionale » occur in the 

 Antarctic, but the proportion is again not very large. 



In many cases, where Bryozoa are described, the depth from which they were obtained 

 is not given, so that it is impossible to give the range fully. However there are five species 

 only previously known from considérable depths, namely Bugula bicornis Busk from ig5o 

 fathoms (3i6o mètres); B. reticulata Busk, found at 6oo fath. (970 met.); i325 fath. (2i5o 

 met.), 1600 fath. (2690 met.), and 2160 fath. (35oo met.) ; Bifaxaria denticulata Busk, from 

 600 fath. (970 met.) ; Cellaria dubia Busk, from 600 fath. (970 met.) ; Turritigera stellata 

 Busk, i5o-6oo fath. (240-970 met.). Ail the others hâve been recorded from the littoral or 

 laminarian zones, though Micropora coreacea Esper, also occurs down to 430 fath. (730 met.); 

 Hippothoa divaricata Lamx. to 1000 fath. (1620 met.) ; Smittia reticulata MacG. to 3oo fath. 

 (490 met.); S. crozetensis nom. nov. to 210 fath. (340 met.); Idmonea atlantica Forbes to 1000 

 met. ; Lichenopora fimbriata B. down to i5o fath. (240 met.). 



Before passing to détails I would express my obligations to those who hâve given 

 me assistance, especially to M r Kirkpatrick to whom I hâve gone several times, to see the 

 Challenger and other collections in the British Muséum. For permission to study the 

 collections in the Muséum d'histoire naturelle in Paris my thanks are due to Prof. Perrier, 

 Prof. Boule, Mons. Gravier and Prof. Joubin, as well as to members of the staff for help 

 given. 



The following lists enumerate the species, first according to the dates on which they 

 were collected ; and then the second according to our présent ideas of classification, giving 

 also the distribution. 



