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| Corrections. aie 
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The reader will please ‘correct the disagreably large number of ae. errors , ay 
the more important of which are enumerated in the subjoined list; the balance and especially the 
numerous and annoying errors of punctuation he will not fail himself to discover. Many citations of 
figures, omitted in their proper places, will be found in the ,,Explanations“. 
‘ % af é 
| 2 
° 
rr 27 line - omit (Pl. D a 39 line ~ for Vit. Vi 
5 for immersed read emersed - - - distinct r. distant 
28 - 3 - globosa- r. globoso-4, | - - - “ after stipata put ; 
- - = 21 - orbiculatus r. orbicul - - 40 - 13 for one ¥. our 
ce “ - - - = after radialibus- add 7 : Ha Ss Ae siructa r. stricta 
. - 29 - 11 for arcete r. arcte - - = 15 = tuberculatus r. tuberculata 
= = = 13 - Plaielr. Plate lt . - - - ise: after gracilioribus put ; 
- - = 32 -  ovato, r. ovato- , + @1.°~@ 3 for Fi. Vr. Pi. Vill 
ee co ae c= for interruptus te interrupht - - = 28 - marginatis r. emarginatis 
- =.= = = radahbus,r. radialibus - = “= 32 add PIX fig. 3-5. Pl. XXII fig. 7-8. 
- - - 40 - Plate I f Plate IT -~ 43 - 16 omit similar seed, but 
-- 30 - 27 - higher and r. higher than | =. = - 45 for purpureis r. purpurei 
= 31 - 28 - cylindricusquer.cylindricusve| - 44 - 7 - originate ¥. originating © 
<a after 2-21/, add feet - - - 21 after armatis put ; = 
— - 44 for avis r. aville 1 Se 23° : flexuosisve put , 
ee - spinulose Yr. spinescent - - - 46 - 5-40 omit , 
- = = 20 omit after off the ; - 45 - 1 for petaloide- xr. petaloideo- 
- - - 22 - laticosiatus . | - -- >= 13 - spring r. spiny 
a - 33 - 6 after bulbous add of Ths “> :. - - = 23 after young add or 
4 oe - , > for species Yr. spines aie +1. - - = 36 = smaller add ; 
SCS “a4 - ined. r. in R.B.C.-Fruit” fh - = - AL - — transversis add ; 
< 36. - 26 omit into subspecies ii=-  - = 44 for shortest r. stoutest 
34 ~ 414 for wnabley. enabled = 46 - 20 add Pl. XXIV fig. t 
"= = 44 -. Mexico r. New-Mexico || ~ = -"35 for 4-1/, r. 11, : 
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