MANX DIATOMS OF THE U^BATKOSS VOYA< 305 



walls, having two more or lees produced horns a1 the extremities of the oval or elliptical 

 valves, and further ornamented with from two to many long vertical and generally 

 acuminate setae or spines. 



Biddulphia granulata Eloper, Trans. Micr. Soc. Lond. n. s. 7: L3. pi. l.f. 10 n . pi. 2. 

 f. 12. L859. Moeb. Diat.-taf. /</. 25./ 10 11, pi 26. f. I Schmidt, Atlas 



pi. 12 2 . f. 18. 1888. Van. Heur. Synop. pi ?; pi 101. f. 4. 1881. B< 



Proc. Acad. Phila. 1900: 702. L901. 

 I),' Toni ° places this as a synonym under Dentin Ho turgida Ehrenb. Tin- unfigured 

 description of thai species by Ehrenberg & can not afford any satisfactory lt^iiiiI- for 

 uniting these two. 



Found at stations 3513, 3603, Bering Sea. 

 Biddulphia grundleri S<h in id t. Atlas pi /. .. 1*88. 



Although tlii— might easily be considered a variety of B. pulchella Gray, I find 

 Bufficienl contrast to warrant theacci Schmidt's name, al least for the pr< 



Not only the scarcely observable marking of the rounded ends of the horns menl 

 by him in the above citation, but the large, widely Bet, and prominent beads which 

 mark the valves of my specimens, instead of ili<- more thickly set l><-adinu r or reticu- 

 lated marking of l>. pulcfo Hn. present t"<> strong a contrasl to favor their union. 



Found at station 4013H, <-:i-i coast of Eonshu Island, Japan. 

 Biddulphia keeleyi J'.uyer. Proc. Acad. Phila. 1898: 169. pi . ./.... L898; 1900: 

 708. L901. 

 Boyer L r i\r~ three localities for this diatom, the last being Monterey Bay, * lalifornia, 

 and marks it "'rare. - ' In the single sounding where it appears, also made in Monterey 

 Bay. it is abundant. 



Found at station L505H, near Santa Cruz light-house, Monterey Bay, Cal. 

 Biddulphia levisKhrcnl). Ber. Akad. Wiss. Berl. 1843: 122. L844. Boyer, Proc. Acad. 

 Phila. 1900: 712. 1901. 

 Odontella polymorpha Kiitz. Bacill. 138. pi. 29. f. 90. L844. 



tiaulus levis Pali- in Pritch. Hist. [nfus. ed. 4. 847. pi 6. f. 7. 1861 (not Biddulphia 

 lews Ehrenb.) Raits in Pritch. Hist. Infus. ed. 4. 848. 1861, which is Denticella 

 levis Ehrenb. P><-r. Akad. Wiss. Berl. 1844: 204. L845, and Odontella levis Ruiz. 

 Sp. Alg. L36. L849 . Schmidt, Atlas pi. 116. f. 18 15. L886. 

 Cerataulus polymorphus Van Heur. Synop. pi. 104./. :'. 1. L881. 

 This diatom, well deserving tin- specific name given by Kiitzing, polymorpha, was 

 found in only one sounding. It was there unusually large and smooth. 



Found at station 2920H, Hawaiian Islands. 

 Biddulphia luminosa (Brun A: Temp. Mann. Plate XI. VI. pigi re •">. 



Triceratium luminosum Brun & Temp. Mem. Soc. Phys. et Hist. Nat. Geneva 30': 



62. pi '■./. S. L889. Schmidt, Atlas pi 159. f. 6. 18 

 The authors distinguished this from the similar species, T.af lean Ehrenb./ '/'. 

 gratum Schmidt.'/ and '/'. molleri Pant.' It i~. however, very close i" the Latter. 



Two specimens wort- found by me, one with a length on side of 0.083 mm. and the 

 other with a Length on side of <>.r>:i mm. I figure this species because the drawings 

 referred to above give in both instances emphasis to the dotted centers of the : 

 an aspect entirely lacking in my specimens. 



Found at stations 2694H, L029H, off southern California and Bering ; 



De Toni, Syll. Alg. 2: 883. L894. 

 &Ber. Akad. Wiss. Berl. 1840: 207. L841, or Pritch. Hist, [nfus. ed. i. 849. L861 

 < Ehrenb. Mikrog. pi 85A. XlXb.f. l. L854. 

 '/ Schmidt, Atlas ,-/. 77. f. 19. L882. 

 ' Pant. Beitr. Bacill. Ung. 1: 53. , 



