3<^!^ S.A. r.KMJlMl^TA. 



with the species of the Northern type ah-eady mentioned, are a 

 very considerable numl)er of species l)elonging to (jcncra which 

 either entirely or mostly helong to the Southern Hemisphere, 

 and are either absent or ]j(x:)rly re])resented north of the ecjuator 

 elsewhere than in Africa. 



It seems strange indeed, but is the case, that most of these 

 Southern (jeiicra are represented alike in South America, .Vus- 

 tralasia, and Africa, indicating that at an earlier period some 

 ineans of transport or some land connection existed. 



Among such (jcncra are : — 



Psilopilimi. (ti(jasfcr>ni:iit. J-abronia. 



Arch idinm. Cioiiioiii itriiiiii. Dhnerodon tinm . 



Holomitrhini. liiisficliia. HeUcodont'mm. 



Dicraiioloiua. Hartraiiiidiila. Rigodiiiiii. 



Lcitcolonia. (ilyf^liocarf^iis. Hookeriopsis. 



Ptyclioiititriitiii. I'rciifclia. CallicostelUi. 



Hyopliila. Orthodoufiiiiii. Cyclodictyoii. 



Ltpfodoutliiiii. llaplodoiitiiini. Sqitamidiuin. 



TriqiictrcUa. HracliyinoiiiDii. Calyptotliccium. 



Syrrhopodon. Rliacocarpiis. Porothaynnium, 



Sclilotliciniia. Pnunodo)i. Sciaruiniiiin. 



Macroinitriiiiit. /'orsstriciiiia. Catatjoiiiiiiii. 



Common to Africa and South America, luit absent from 

 Australasia : — 



PiloirlchcUa. Porofricliinit. Microthainniuii 



Common to Australasia and A;frica. Ijut absent from Soulh 

 America. TrachyphyUitui. 



Identical species represented in Africa as well as in other 

 parts of the Southern Hemisphere, but not elsewhere, include: — 



Aiuircica siibitlata, 



Plenridinm nervosum, 



AoiKjstra'ntia jiilacca. 



Barbula pUifcra, 



Rh izuyuninm spin ifo nn c, 



Ditrichnm strict um (Hk.f.c^W. ) Hpe., 



Ditric/utin flcxifolinin (Ilk.) Hpe.. 



and e)thers. 



A very marked deviation from the usual distribution of the 

 SoiUhern type occurs in regard to several Pleurocar]x>us ficnera. 

 including Papillaria, Stcreophyllnni, Ploribundaria, Eriopus, 

 Airobryopsis, Prythrodonthim, Hypo pterygium, etc., which in 

 habit only South America, Africa, and liast Asia, crossing the 

 equator in a diagonal line, but not extending to North America. 

 Kurope, or Australasia. In this latter connection the most 



notable absentee from South Africa is the genus Calympcrcs. 

 which is known' oidy from, but is well represented in. South 

 America, Africa, African Islands and I'^ast Asia; in Africa ii 



