22 NOTICES OF BOOKS AND MEMOIBS. 



regions, the majority belonging to the New World. Over 400 

 species inhabit Tropical America ; Tropical Asia and the Indian 

 Archipelago have over 200 species ; and Tropical Africa onlv about 

 30 species It is remarkable that although Arads abound on the 



ZnZ*t °i **£$* °* Bou * h **"*+ only one species has 



yet been found in Chili. According to these tables, no true Arads 



have been found m New Zealand, the Sahara, California or Jh 

 Piame region of North America; the Azores, New Hebrides, Fiji 

 Isles and the Pampas of South America have each one species 

 Of the principal tribes or subfamilies, the Pothoide* are mos 



moTtTtle n Oirw S I? t & NeW W °, r1 ?' klt th ° «*«™ nnSSS 

 most in the Old World ; the genera of the Motuteroidea are about 



equally divided between the two hemispheres, but the s "cies are 

 rather more numerous in the western hemisphere; the L« W, , 

 PhilodendrotCe, and OolocaHaidm have more genera butfewS 



£S£ all Old W^ *** » J* New T^***Z 

 Z^lt^L^T™^™ ™^ abundant in India 



ana me Indian Archipelago. From this it appears that the t 7 

 dency to variation has been to produce a largV n unl r of ^eiieric 



m the western hemisphere whprp tli*™ «™ *., ^i^cxo, wiu 



founded upon entirely now dS3, « • gGnera ° U + 62 is 

 (even if in all cases con-- «t w i in i aonbtful if these characters 



do not possess. Tho sv^Am ,i™„ I ie( l uue to use this book 

 that ofSchott and ifvty i vo ved ^Ti ^ be «"* better *" 

 figures to denote the f o ,7st" act?e ^ SV* ° f letterS and 

 series of mathematical uTobl^doS^ *&***&*«»* of a 



If these anatomi d chaVac , nave Invtl fti* "?"»% 

 GamocMai , f s i, w ftf , . • , ,in y %,lIUi '- ^ w curious that 



Jhxcha^och^ is now found to be Jenti M 7"-' l ? 



famdy via., ten genera inter >nimr! ' pUced m 8llb * 



Iho descriptions of the renew nr, l o~ • 



better ,,k„ than Ul080 of S,l,o! n i i ™ U 1 :;! S u , ar » ™ ■*" * 



bm iioaiomus, the synonyms, 



