Dyck (Dusseldorf, 1842, 8vo.) I have a little varied the 
terminations of the names of the Tribes, as part of a plan for 
reducing all Botanical terminology to one standard; the 
details of which will be worked out in a new edition of the 
Natural System of Botany now passing through the press. 
Number of species 
included in each 
Tribe 1. MzrocacriD. genus. 
1. Melocactus C. Bauhin ; : 15 
2. Discocactus Pfeiffer i i > 1 
3. Anhalonium Zemaire : : ; l 
Ariocarpus Scheidweiler. 
4. Mammillaria Haworth  . i | T DS 
Tribe 2. EcmiwocacrID x. 
9. Echinocactus Zink & Otto : : 76 
Astrophytum Lemaire. 
Tribe 3. CEREIDZ. 
6. Echinopsis Zuccarini — . . , 11 
7. Pilocereus Lemaire : ^ ‘ 2 
(This includes Cereus sessilis. ) 
8. Cereus Haworth i i Ic 00 2E 
Tribe 4. PHYLLANTHIDA. 
9. Phyllocactus Zink ; a : 7 
(This includes C. Ackermanni and speciosus.) 
10. Epiphyllum Pfeiffer  . A . l 
11. Disocactus Lindley F A s 1 
Tribe 5. RHIPSALIDE. 
12. Rhipsalis Gertner . . è 17 
Hariota Lemaire. 
(To this is referred Cactus alatus.) 
13. Lepismium Pfeiffer - 4 : 3 
Tribe 6. OruwTIDx. 
14. Opuntia Tournefort . : . 94 
Tribe 7. PERESKIDÆ. 
15. Pereskia Plumier : 3 : 7 
