636 DR. G. J. HINDE AND ME. HOWARD FOX ON [Nov. 1 895, 



•125 mm. in diameter; it is connected by a number of short, stout rays 

 with the inner sphere, which is "07 mm. in width. C. rnacractinia, 

 Piist, from the Culm of the Harz, has similar stout connecting- 

 rays, but it is a much larger form (' Palaeontographica,' vol. xxxviii. 

 1892, p. 136, pi. vii. fig. 4). Artiscombe Quarry, near Tavistock. 



Carposphcera sp. c. PI. XXV. fig. 6. The outline of the test is 

 now slightly elliptical ; it is about *1 mm. in diameter, the inner 

 sphere is -05 mm ; it is connected by three stout rays. In a boulder 

 from the Lower Culm at Tavistock. 



Carposphcera sp. d. PI. XXV. fig. 7. Test now slightly elliptical, 

 with in places a bluntly-spined or dentate margin, diameter -13 mm. ; 

 the inner sphere with a thick wall, diameter "05 mm. ; numerous 

 stout rays connect it with the outer test. Pamshorn Down, South 

 Quarry. 



Genus Thecospbt^ra, Haeckel. 



The test consists of three concentric latticed spheres connected by 

 rays. 



Thecosphcera sp. a. PI. XXV. fig. 8. The spheres in this form 

 are "14, '065, and '015 mm. in diameter respectively. There are six 

 rays connecting the spheres ; probably more were originally present. 

 Hedge section, Lawell House, Chudleigh. 



Genus Xiphosph^ira, Haeckel. 



The test is a simple latticed sphere with two similar free rays or 

 spines, one from each pole. 



XiphospTitera sp. a. PI. XXV. fig. 9. The test is *06 mm. in dia- 

 meter, and each of the spines about - 11 mm. in length. Pamshorn 

 Down, North Quarry. 



XiphospJicera sp. b. PI. XXV. fig. 10. The test is considerably 

 larger than the preceding ; its diameter is # 13 mm. The spines are 

 stout at the base ; they gradually taper, and end obtusely. They 

 are -09 mm. in length. Pamshorn Down, North Quarry. 



Genus Xiphostyltjs, Haeckel. 



Test a simple latticed sphere, with a spine or ray from each pole. / 

 The spines are unequal in length. 



Xiphostylus sp. a. PI. XXV. fig. 11. The test is depressed 

 spherical, "11 mm. in diameter ; one spine is stout and -12 mm. in 

 length, the other slender and only *09 mm. long. Pamshorn Down, 

 North Quarry. 



Xipliostylus sp. b. PI. XXV. fig. 12. The sphere is '12 mm. in 

 diameter ; at one pole is a short acute spine, and at the other a much 

 stouter spine of which only the base remains. The test shows traces 

 of the lattice-structure. Pamshorn Down. 



