5a 

 piculate, \ - 



36. — Rays without apiculi (37). 



te top and bottom. R tys slightly infundibuli- 



form, with very narrow funnel. ( '. emar%inatus, Deby. 



38. — Valves not eraarginate at the ends (39). 



-Striae slightly wavy, inter-strias moniliform or punctato-striate.t 

 I irg granules exisl on each side of the Raphe, 

 and bottom. | rivulosus, T. md Br. 



40. — Striae straight, not undulating, linear, smooth. No granules 

 on sides of pseudo- Raphe (41 ). 



41. — Raphe distinct. C decerns, Breb. 



42. — Raphe reduced to a mere line. C. Ra//sii\\ \\". Sm. 



43. — Inter-radials formed by a marginal row of oblong beads, 

 which are interrupted and followed by a second concen- 

 tric row of smaller beads. On each side of Raphe a 

 row of parallel, short, linear granules. C. Raeanus, 1 )eby. 



44. — Inter-radials not formed by a marginal row of beads ; R 



after an interruption reaching the Raphe, which is not 

 limited on each side by a row of parallel lines (45). 



45. — Area tumid in the middle, with blunt terminations 



C. triumphanSi A. S. 



46. — Area not tumid in the middle. Terminations of area acute. 



(47)- 

 47. — Blank spaces continuous all round area, inter-radials finely 



punctate. C. ScJimidtii, (irun. 



* Apiculate var. of C. Ralfsii most probably. 



t The figure in T. and Br. Jap. does not show the true characters of the 

 striae in this species, of which I have had original specimens under my 

 microscope. 



+ I am inclined to unite with C. Ralfsii, C. decorus, Breb. , and C txilis, 

 Grun. 





