308 iNTBIBUTIONS FROM THE NATIONAL HERBARIUM. 



Biddulphia reticulata H Lond. n. s. 7: 14. pi. 



i ball. Bot 2: LO 

 d. Phila. 1900: 708. L901. Van Heur. Synop. pZ. 



! 



Syll. Alg. 2: B68. 1894. 

 this diatom are plentiful in the dredging to be cited. Form die- 

 quadrate specimens <>\ this spe< i< 

 inder that sp< 



i Honshu 1-1. in. I. Japan. 

 Biddulphia robertaiana Gre> B lead. Phila. 1900: 707. 1901, 



■ ! ..in Joum Mi. r. S< i n. b. 3: 231. pi. 9 

 6: -' M...-1.. hiai.-tai. pi. .;./". 9, />/.;/../'. 390 Schmidt, 



var . pi 

 diatom is rather close to the Triceratium <jr<ih<l, form of Biddulphia 



Heurck, both in it- general -1 iu | »« ■ and in the fine radiating secondary 

 markings. Still, the fact that the processes are \ ery obtuse and separated by a hyaline 

 i in the reticulation ami that the angles are not al nil prominent, together with 

 oeral presence of Large spines on the Bides, give it an aspeel thai warrants its 

 separate name. It is quite possible that the first of 1 1 1 « - < rreville figures cited above is 

 of •• / trufl "' an<l his Becond figure thai of tin- true type. They are very 



dissimilar. The second i- at any rate more like the forms classified byme in the 

 — better with the description u r i\<-n by Greville, excepl in 

 ill.- matter of spines, all my specimens having two >t<>ut spines near tin- margin of 

 each of the three Bides. It i- spoken of by Greville, Schmidt, and Boyer a- very rare, 

 [n the single gathering where I found it it is fairly abundant. Boyei aaye Pacific 

 soundings 20 1<» X. 158 li'W.. 2,507 fathoms." My specimens came from Pacific 

 soundings 21 21 X.. !■">: 09' W., and though tin- depth i.- only ">:o fathoms, the loca- 

 tion is righl "ti the edge of a deep plain a\ «-rau r i tiir 2,500 fathoms; this particular 

 sounding being jusl close enough inshore to gel the rise of the land from the true sea 

 bottom. Tin- i- another one of many instances described in this work where a single 

 species i.- very Bignificanl of locality on the Bea bottom. 



Pound at station 2920H, Hawaiian [slands. 

 Biddulphia ropeiianatjrev. Trans. Micr. Soc. Lond.n.s.7: V6S.pl. 8./. tl-lS. 1859. 

 Van II- ur Synop. pl.99.f. I 6. L881. Schmidt, Atlas i>1. ISO. f. tO • L888. 

 II I.. Smith, Diat. Sp. Typ. no. 625. L874. Boyer, Proc. Acad. Phila. 1900: 

 L901. Castr. Rep. Voy. Chall. Bot. 2: lor,. pi .<>../.... L8* 



Plate XL VI, i i«.i rb 2. 

 Odontella De Toni, Syll. Alg. 2: 868. L894. 



It is also possible, as suggested by Boyer, ° thai Biddulphia Odontella discigeraQnm. 

 and Triceratium Odontella discigera var.?) californicum Grun.& mighl !>«■ classed as 

 Bynonymous with the above; bul withoul morelighl than these'two figures afford I am 

 unwilling I ■ Btion. As has been stated under Biddulphia edwardtii 



Febiger, I find thai V>. <>),\,i>n Ktitz. Kalis, as figured in Van Heurck agrees better 

 with that species than with t hi.- one, though De Toni (/ favors the idea of this species 

 being a large form "i" Kutzing's Bpecies. As i" that matter I have much doubl aboul 

 being any close similarity between these species independenl of the relation of 

 Van Heurck'e figures. !>■ Toni follows the reference to Van Beurck's figure with the 

 remark, "OdonU videtur forma major hujus speciei," hut he gives 



ad. Phila. 1900: Too L901. 

 6 Van I Lin. Synop. pi. W8.f. 9, 11. L881 

 • Op. <it. 100./ // /;. 1881 

 1». Toni, syll. Alg. 2: B63. I 



