74 M. Brongniart on a Fossil Lycopodiacean Fruit. 



Fig. 54. Cephalothorax and abdomen, from above and behind, witb tbe 



former elevated. 

 Fig. 55. Tbe same, witb cephalothorax depressed forwards, as in fig. 53, 



i. e. in natural position of rest. 

 Fig. 56. Spider of natural size. 



Plate VI. 



Salticus bicurvatus. 

 Fig. 57. Spider magnified. 

 Fig. 58. Tbe same, in profile, without legs. 



Fig. 59. Right falx, showing double row of minute teeth underneath. 

 Fig. 59 a. Left falx. 

 Fig. 60. Natural length of spider. 



Salticus plataleoides. 



Fig. 61. Spider without legs. 



Fig. 62. Portion of ditto, in profile. 



Fig. 63. Spider, of natural size. 



Fig. 64. Underside, showing maxillae, labium, sternum, and left palpus. 



Fig. 65. Right falx, from inner and underside. 



Fig. 65 a. Natural length of spider. 



Eresus bicolor. 



Fig. 66. Spider, from above, with only portion of leg of first pair. 



Fig. 67. The same, in profile, without legs. 



Fig. 68. Cephalothorax (caput) and falces, from front. 



Fig. 69. Natural length of spider. 



Frcsus tibialis. 



Fig. 70. Leg of first pair, showing enlarged tibial joint (a). 

 Fig. 71. Natural length of spider. 



XIV. — Note on a Fossil Lycopodiacean Fruit. 

 By M. Brongniart*. 



The study of the fossil plants of the older strata possesses a 

 peculiar interest in consequence of the singularity of their 

 forms, which most frequently separates them in a very striking 

 manner from those which live at present on the earth. With 

 the exception of the ferns, the resemblance of which has always 

 been recognized, the plants of the Carboniferous formation 

 differ so much from those which have inhabited the earth at 

 more recent periods, and from those which now inhabit it, that 

 very careful comparisons have been required to connect them 

 with the families of the existing world. Nevertheless, from 

 the commencement of my investigations upon this subject, 

 I have indicated the relations of several arborescent plants 

 of this period to the Horsetails or Equisetacese and to the 

 Lycopodiacese. 



* Translated by W. S. Dallas, F.L.S., from tbe ' Comptes Rendus,' 

 Aug. 17, 1868, tome lxvii. pp. 421-426. 



