REPORT ON THE RADIOLARIA. 1199 



14. Dictyophimus lucerna, Haeckel. 



Lychnocanium lucerna, Ehrenberg, 1854, Mikrogeol., Taf. xxxvi. fig. 6 ; Abhandl. d. k. Akad. d. 



Wise. Berlin, 1875, p. 80, Taf. viii. fig. 3. 

 Lychnocanium lucerna, Haeckel, 1862, Monogr. d. Radiol., p. 311. 



Shell smooth, three-sided pyramidal, with slight collar stricture. Eelative length of the two 

 joints = 1:4, breadth = 1:4. Cephalis hemispherical, with a thick conical horn of twice the length. 

 Thorax with small regular, circular pores and three flat sides ; between these arise three rounded 

 ribs, which are prolonged into three short, conical, divergent feet, one-third as long as the thorax. 



Dimension. Cephalis 0'02 long, 0'025 broad ; thorax 0'08 long, 0'08 broad. 



Habitat. Fossil in Barbados. 



15. Dictyophimus hamosus, Haeckel. 



Lychnocanium hamosum, Ehrenberg, 1875, Abhandl. d. k. Akad. d. Wiss. Berlin, p. 78, 

 Taf. vii. fig. 9. 



Shell pear-shaped, rough, with deep collar stricture. Eelative length of the two joints = 1 :2, 

 breadth = 1:3. Cephalis subglobular, with a conical horn of twice the length. Thorax with small, 

 regular, circular pores, and with three prominent ribs, prolonged into three vertical prismatic feet, 

 which are about as long as the shell, parallel or a little convergent towards the distal end, with 

 recurved teeth or hooks at the lateral edges. 



Dimensions. Cephalis - 02 long, 0'02 broad ; thorax 0'04 long, 0'06 broad. 



Habitat. Fossil in Barbados. 



16. Dictyophimus tridentatus, Haeckel. 



Lychnocanium tridentatum, Ehrenberg, 1875, Abhandl. d. k. Akad. d. Wiss. Berlin, p. 80, 

 Taf. vii. fig. 4. 



Shell smooth, three-sided pyramidal, with deep collar stricture. Eelative length of the two 

 joints = 1:3, breadth =1:4. Cephalis subspherical, with a conical horn of the same length, and 

 some small accessory thorns. Thorax tetrahedral, with three smooth hyaline walls, bearing only a 

 single series of small pores on each side of the three prominent ribs, which are prolonged into three 

 strong prismatic curved feet of twice the length, with the convexity external. A group of small 

 pores and a strong triangular tooth at the base of each foot. 



Dimensions. Cephalis 0'02 long, 0'02 broad ; thorax 0'06 long, 0'08 broad. 



Habitat. Fossil in Barbados. 



Subgenus 2. Lamprotripus, Haeckel, 1881, Prodromus, p. 432. 



Definition. Shell spiny or thorny, with prominent spines on the edges of the three 

 thoracic ribs. (Commonly one larger and a few smaller horns or spines on the cephalis.) 



