52 BULLETIN 100, UNITED STATES NATIONAL MUSEUM 



CAMPVLODISCUS HOROLOGIUM Williamson 



(Ann. Mag. Nat. Hist., 1848, ser. 2, vol. 1, p. 321; Smith, Brit. Diat,, pi. 6, fig. 

 51; Schmidt, Atlas, pi. 51, fig. 7; Deby, Campy., pi. 6, fig. 29a.) 



Here is included a hardly separable variety called C. pjitzeri A. 

 Schmidt in his Atlas, plate 17, figures 5-6. This same form was 

 found by the Challenger expedition at the Philippine Islands and 

 named by Castracane C. lepidus (Chall. Exp., pi. 16, fig. 7), although 

 his type specimen was from the Sea of Japan and to this he gave the 

 name of C. orbicularis (Chall. Exp., pi. 16, fig. 10). 



CAMPYLODISCUS INCERTUS A. Schmidt 



(Schmidt, Atlas, pi. 15, figs. 13-15.) 



As mentioned under C. castracanei, this name in Schmidt's Atlas 

 precedes C. samoensis Grunow on the same plate (figs. 18-20), despite 

 which Deby and De Toni adopt the latter. The doubt implied in 

 the specific name may refer to this likeness between the two, although 

 Schmidt may have had in mind C. concinnus Greville, between which 

 and these forms a marked resemblance exists. As already mentioned, 

 I see no gain for purposes of identification in placing C. concinnus 

 under C. imperialis. 



CAMPYLODISCUS INOPINUS A. Schmidt 



(Schmidt, Atlas, pi. 207, fig. 18.) 



CAMPYLODISCUS INTERMEDIUS Grunow 



(Schmidt, Atlas, pi. 14, fig. 30; pi. 18, fig. 9.) 



The resemblance to C. crebrecostatus Greville is close enough to 

 deserve mention, but not close enough to unite them, as is done by 

 De Toni (Syl. Alg., p. 613). 



CAMPYLODISCUS KINKERII A. Schmidt 



See under C. brightwellii Grunow. 



CAMPYLODISCUS KITTONIANUS Greville 



(Micro. Journ., 1850, p. 32, pi. 1, fig. 7; Schmidt, Atlas, pi. 16, figs. 19-20 

 Deby, Campy., pi. 10, fig. 52.) 



CAMPYLODISCUS LATUS Shadbolt 



(Micro. Journ., 1854, p. 16, pi. 1, fig. 13; Schmidt, Atlas, pi. 207. figs. 6-9; 

 Deby, Campy., pi. 3, fig. 306.) 



It has a wide geographical distribution, and is also quite variable. 

 C. ambiguus Greville (Micro. Journ., 1860, pi. l,fig. 5) may be the 

 same. 



See remarks under C. ambiguus and C. contiguus. 



