MANN DIATOMS OF I Ml. ALBATROSS VOYA 263 



gestion of putting this in .1 newgenue Micropodiscus; though the name would l»<- bad, 

 as some specimens have, as above stated, nol a "little foot," but ident 



peeudonodule. Castracane's figure gives emphasis to contorted markings thai do nol 

 (.ccur in all cases. I do not agree with Rattray that I lus antarti* 



and .1. wmbonatus Castr. & are synonymous with the above. The failure to !in<l a 

 peeudonodule in the original specimen by O'Meara 1- probably explained by the 

 inconstancy of 1 hal si rucl ur . 



Found al Btation 2859, off thi coasl of Alaska. 



Actinocyclus ralfsii W. Smith Etalfsin Pritch. Bist. Enfus.ed. L 835. pi. 5./ - .. L861. 



Van Beur. Synop. 215. pi 12S.f. 6, pi. 1 '.].(. 1 ,. 1881 



Irish Acad. II. 2: 268. pl.S7.f. t. L875. Etatt. Journ. Quek. Micr. Club II. 4: L55. 



L890. DeToni,Syll. Alg.2: 1 L70. L894. Castr. Rep. Voy. Chall.-Bot. 2: 1 i:;. pl.80. 



f.i. L886. Eng. & IV. Pflanzenfam. 1 & : 7S./.119B. L896. Blake, Trans. Wise. 



Acad. 14: L08. pl.S \. L903. 

 Eupodiscus ralfsii W. Smith, Synop. Brit. Diat. 2: 86. L856. Moeb. Diat.-taf. pl.5. 



f. 11. I -'-' 

 Eupodiscus sp< • . Trans. Micr. Soc. Lond. n. s. 5: 81. pl.l.f. ::. - 



Coscinodiscus fuscus Norm. Trans. Micr. Soc. Lond. n. s. 9: 7. pi. l.f.S. L861. 

 Actinocyclus fust & II I.. Smith, Sp. Dial. Typ. no. 11. L874. 



The specimens found a1 station 361] an- a small and coarse variety similar to the 

 figure in Moebius cited above. 



Found ;ii stations 3361B and ::»;i I. off tin- coast of Alaska. 



Actinocyclus sparsus G L Journ. Quek. Micr. Club II. 4: L56, L70. L890. 



!).• Toni, Syll. Alg. 2: I 177. L894.- 

 Eupodiscus spt > 2 Trans. Micr. Soc. Lond. n.s. 5:81. pi. l.f. 47. 1857. Moeb. 



Dim. -1 hi'. i>!. 12J.47. L890. 



Actinocyclus ralfsii sparsus Ralfs, Pritch. Eist. Enfus.ed. L 835. L861. < leve&Moll. 

 type no. 1 L5. I x 7v 

 Actinocyclus fasciculatus Castr. Rep. Voy. (hall. Bot. 2: y 



A- Ilai 1 iay points out, c il is a matter of doubl if this form is not to be looked upon as 

 a variety of A. ralfsii, thus agreeing with Ralfs's opinion d in Pritch. Hist. Enfus. above. 

 But, like Rattray, I feel thai this union is questionable enough to warrant thesi 

 tion. at leasl for 1 ho present. As has In -on pointed oul in the discussion of the genus, 

 the above di ffera from < 'oscinodiscus tufo rculatus < rrev., only in the presence of a pseu- 

 donodule. < 



Found nt Btation 3346, off the coasl of Washington. 



Actinocyclus subtilis Greg. \l.<\\< in Pritch. Hist. Enfus. ed. I. 835. E861. I: 

 Journ. Quek. Micr. Club II. 4: L88. E890. II. I.. Smith, Am. Journ. Micr. 2: 

 101. L877. II. !.. Smith. Sp. Diat. Typ. I 1. L874. Van Hem-. Synop. 216. pi 

 /. ;. L881. De Toni, Syll. Alg. 2: L183. L894. 

 /.' podiscus subtilis Greg. Trans. ! Edinb. 21: 501. pi 11. f 50. l s ">7: not 



Ehrenb. l s "> : >. nom. nud. 

 Eupodisi Breb. Journ. < v >imk. Micr. Club 2: 41. L8 



Rep. Voy. Chall. Bot. 2: 1 15. IS 

 f > hoc. cit. pi I. fig. -'/. 

 'Journ. Quek. Micr. Club II. 4: 156. Lfi 

 Pritch. Hist. Enfus. ed. I. 835. L861. 

 See Greville's original figure in Trans. Mici S Lond. n. s. 0: L861, 



>r Moeb. Diat.-taf. pl.S7.f. 6. - 



31713 \<>i. l". Pi 7, 117 1 



