Diameter of valves (averaj 153 

 m.m. 



mi. of area: long., 0099 to 01 16 m.m. ; lat., 0*09 

 0116 m.m. 



Length Of rays, 0026. 



Valves circular. Rays infundibuliform. Shafts of equal 

 length to funnels. No circlet Centre obsoletely punctate. 

 Funnels showing granules distinctly. Inter-radials punctate. 



This has at first sight the appearance of C. horologium, 



hut is without a circlet and the area is oval. It is slated to have 

 been collected at station 233 of the Challenger expedition, and 

 was discovered and offered to me by Mr. I . E. 1 >oeg. 



Campylodiscus vermiculatus. Temp., "Le Diatomiste," 



Vol. I., pi. 2, f. 9. 



Through the kindness of M. Tempere I have had an oppor- 

 tunity of seeing the type of this species, which I find to differ so 

 much from the figure published of it, that I think best to give 

 a more elaborate description of it, which may help towards its 

 recognition by others. It belongs to the group of " Striata;. '' 



Diam. of valves, 00865 m.m. 



Diam. of area : long., 0-053 ; lat., 0-039. 



Length of rays from margin to area, 0*019. 



Valves nearly circular, much curved. Rays originating in con- 

 ical marginal beads traversed by a fine longitudinal line. After 

 these beads comes an interruption of 0006 m.m., traversed by a 

 fine line, followed by a moniliform portion of the rays, with a 

 double row of small beads or puncta. Length of this double- 

 beaded portion, o - oo6. No circlet One minute inter-Radial 

 marginal bead to each pair of Rays. Striae radiating from centre 

 of area, undulating, irregular, occasionally anastomosing. 



The slide is labelled Sendai, Japan, but in " Le Diatomiste " 

 New Caledonia is indicated as the habitat. 



Campylodiscus Raeanus. Deby. 

 Group of the Raphidae. 



