474 Ganong . — Comparative Morphology of Embryos . 
Fig. 30. E. Eyriesii. 
Fig. 31. Rhipsalis Cassytha. 
Fig* 32. Echinocactus Wislizeni : d, older specimen. 
Fig. 33. E. viridescens. 
Fig. 34. E. texensis. 
Fig. 35. E. longihamatus. 
Fig. 36. E. cornigerus. 
Fig. 37. E. ingens . 
Fig. 38. E. horizontalonius : d, older specimen to show epicotyl. 
Fig. 39. E. Williamsii. 
Fig. 40. E. myriostigma. 
Fig. 41. E. capricornis : c, older specimen. 
Fig. 42. E. lophothele . 
Fig. 43. E. Scheerii. 
Fig. 44. Leuchtenbergia principis : c, older specimen to show tubercles. 
Fig. 45. Mamillaria elephantidens. 
Fig. 46. M. radiosa neo-mexicana . 
Fig. 47. M. Sempervivi. 
Fig. 48. M. Goodridgii. 
Fig. 49. Anhalonium fissuratum : d, older specimen to show tubercles. 
Fig. 50. A. prisinaticnm : c, older specimen to show tubercles and smaller root. 
