ILL US TEA TIONS xxi 



Figure Page 



40. Lima squamosus 51 



41. Antler of Cervulus (?) dicranocenis 53 



42. Antler of Cervus pnrdinensis 53 



43. Antler of the Fallow Deer (Cervus damn) 53 



44. Zoea of the common crab (Cancer irroratus) 56 



45. Profile of head of Chamoeleon Oweni : male 60 



46. Female of the same species 60 



47. Profile of a spider (Ccerostris mitralls) on a twig mimicking a 



spiny excrescence 61 



48. The larva of the Early Thorn Moth (Selenla illunaria) resting 



on a twig ; showing mimicry of stem and spiniform processes 61 



49. Australian Pipe-fish (Phyllopieryx eques) and frond of sea-weed 



in lower right-hand corner; showing mimicry 62 



50. Allorchestes armatus, a spiny am^ihipod from Lake Titicaca ; 



female 65 



51. Acontaspis hastata, a radiolarian ; showing multiplication of 



spines by repetition 69 



52. Strophaloda keokitk, an attached brachiopod; showing the spines 



extending from the ventral valve to and along the surface of 

 attachment 69 



53. A gastropod shell (Plati/ceras) to which are attached a number 



of Strophalosia keokuk 69 



54. The spiny Cytisus (C spinosus); showing suppression of 



branches into spines 75 



65. A single leaf of Tragacanth (Astragalus Tragacantlia), from 



which the three upper leaflets have fallen 75 



56. Leaf a.xis of the same, from which all the leaflets have fallen . . 75 



57. Twig of common locust (Robinia Pseudacaciu) ; showing spines 



representing stipules 75 



58. Portion of skin of Python ; showing the spurs which represent 



the suppressed or vestigial hind legs 76 



59. Bones of suppressed legs of Python 76 



60. Dorsal view of Spirifer mucronatus ; Devonian ; showing spini- 



form cardinal angles 78 



61. Illcemis (Octillfenus) Hisingeri, Ordovician, Bohemia; a trilobite; 



showing spiniform pleural extremities of first thoracic 

 segment 79 



62. Cheirurus insignis, Silurian, Bohemia; pygiilium and six 



thoracic segments 79 



63. Deiphon Forhesi, Silurian, Bohemia ; entire specimen ; showing 



spiniform pleura of segments corresponding in direction to 

 those of the jiygidium 79 



64. Lichas scabra, Silurian, Bohemia ; pygidium, with three thoracic 



segments ; showing spiniform ends of pleura 79 



