306 CONTRIBUTIONS FPOM THE NATIONAL HERBARIUM. 



Biddiilphia mobiliensis (Bail.) Griui.; Van Heur. Synop., pi 101. f. 4-6, pi. 103,/. 

 A. 1881. Schmidt, Atlas j^l 122. /. 20-2U 1888. Bover, Proc. Acad, riiila. 



1900: G98. 190U 



S5, 1851. 



/ 



/ 



Biddidphia hailfyiW. Smith, Synop. Brit. Diat. 2: 50. pi 45 J. 322, pi G2.f. 322, 1856, 

 lloper, Trans. Micr. Soe. Lond. n. s. 7: 12. pi l.f. 5-9. 1859. O^Meara, Broc. Roy, 

 Irish Acad. 11. 2: 275. pi 27./. S. ]875. Ilabh. Fl. Em*. Alg. 1: 311. ISCI. 



Denticdla mohiUensis Gruii. Deiikschr. Akad. Wieii 48-: 7. 1884. De Toni, Svlh 

 Alg. 2: 882. 1894. 



Found at stations 292;i, 4505II, off southern California and near Santa Cruz Light- 

 house, Monterey Bay, California. 



Biddulphia ovalis (Schmidtj Boyer, Proo. Acad. Phila. 1900: 712. 1901. 

 Cvmtaulus ovalis Schmidt. Atlas pi U'u/. 5-7. 1888. 



My form is drawn to a somowhat narrower oval and the processes are in llie long axis. 

 Found at station 2835, off Lt)wer California. 



Biddulphia pacifica (Grun.) Mann. 



Cerataulns panficns Griin.; Schmidt, Atlas ^L 115./. 10. 1888, 



Rattray « makes this a synnnym of Avjiscus ral/siarms Grev.6 and Eupodtiicus harha- 

 dmsis Grev., '^ giving to it the name P^nffhaulisciis nd/sianus (Grev.) Ratt. It may be 

 well to look upon these as the same, in whit h case, the genus Pseudoauliscus not being 

 admitted, the name here would be A. nd/sianus Grev. My specimen is, however, 

 clearly a broad Biddulphia of the Cerataulus variety, and I prefer to agree with Gru- 

 no\v*s analysis, but to include here, as in all other cases, the Cerataulus forms imder 

 Biddulphia. 



Found at station 2807, Galapagos Islands. 



Biddulphia papillata (Gr. &. St.) Mann. 



Triceraiinm papillatum Gr. & St, Journ. Quek, Micr. Club II. 3: 76, pi 6,/ 14, 1887. 

 Schmidt, Atlas pi 128 J, 16. 1888; p?. 1G7J. 5-6, pi 168 J. S. 1891. De Toni, Sylh 

 Alg. 2; 902. 1894; Notarisia 2: 351. 1887. 



I found five specimens of this rare and striking diatom; one triangular and four of the 

 quadrate variety. The smallest, a single valve, measured 0.048 mm. on each side; the 

 largest, also a single valve, measured 0.137 mm. on each side; another, a complete 

 frustulo, measured 0.087 mm. on each side and between opposite horn tips on the zoiial 

 side it measured 0.138 mm. This last specimen showed all the curious markings fig- 

 ured by Grove, « except that the central brush-like clusters of setae were broken. 



It is evident that Grove and Sturt in naming tliis species saw it in only otic position, 

 namely, the val val view, as they state that it is ''very rare " and that they were indebted 

 to Weissflog for their specimen. Their drawing is also the valval ojie. It is conceiv- 

 able that, seen from this side only, it might Ije called Triceratinm; but how (irove, 

 having subsequently seen it from the zonal side, as is shown l>y his drawings, <? could 

 have failed to reclassify it as a Biddn]i>liia it is difFicult to understand. It is a per- 

 fectly typical example of ihie^ genus. 



The complete frustrule figured l)y Grove came from the Hawaiian Islands, as did 

 those figured l)y Schmidt. My specimens eame from the same locality. But as the 

 original specimen was found in a ftx^ail deposit at Oaniaru, New Zealand, it would be 



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a Journ. Eoy. Micr. Soc. 8^^: 43. 1888. 

 ^ Trans. Micr. vSoc. Lond. n. s. 11: 52. pi 3./. 21. 18G3. 

 c Trans. Micr, Soc. Lond. n. s. 12: 88. pi 12./. 4. 1SG4. 

 d Schmidt, Atlas;)?. 168./ 8. 1891. 



