MANN DIATOMS 0] THE ILBATROSS VOYAGES. 2 I 5 



L88] B. L. Smith, Sp. Diat. Typ. no. 507. 1874. i p. Voy. (.'hall. Bot. 



2:88.1886. Schmidt, Atlas pi. ISO. 588. Wolle, Diat. N. A. pi. 62. f. S, 



pi 6( 

 I tswellia minuta Grev. Trans. Micr. Soc. Lond. n. b. 13: I. pi. 1. f. IS. 



Moeb. Diat.-taf. pi. 62. f. IS. L890. 

 Stephanopyxis niejahri Ehrenb. Phys. Abh. Akad. Wiss. Berl. 1872: 214. pi. 6. II. 



L873. 

 Stephanopyris cylindrica Ehrenb. Phys. Abh. Akad. Wiss. Berl. 1873: I'll.///.'.. //. 

 /. /. L874. 



Grunow considers S. apiculata Ehrenb. is separate because its spines are - I 

 ill.- centerof the valve. i>«' Toni ah<> ranks it as -<•] >;ir;i t <•. I think the distinction 

 i- ;i very weak one. The poor figures by Weisse of /'. apiculata ami /'. appendicula 

 art- identical. >'. campanula Castr.a differs from this species solely in the increasing 

 fineness "i the oetwork as ii approaches the margin; in this reaped ii agrees with 

 Ilia i "i I n u G iv. ,& and especially its variel \\< which, like( !astracane's 



form, is not easily separated from the above. S Ilia) turgida Grev.< isalso 



too close for easy distinction. Greville'e \ probably 1 e ; he claims the 



network is much liner than in S. turns, though the valves are considerably : 

 Grunow ' also holds them to be distinct and draw- attention to the enlarg 

 the Bpines. 



Greville repeatedly spells the name "Creswellia," but later "Cresswellia;" the 

 latter is corred . bo far as the English family name of * Sresswell is concerned. 



Found a1 stations 2844, 1029H, Aleutian Islands and Bering Sea. 



Stephanopyxis corona (Ehrenb.) Grun.; Van Beur. Synop. pi. 83ter. f. 10,11. 

 L881; Treat. Diat. 134./. 158. 1896. Grun. Denkschr. Akad. Wien 48 2 : 3 

 L884. Schmidt, Atlas pll23.f. 10-1 pi. 130. f. 13, U 388. De 



Toni. Syll. Alg. 2: 1142. L894. Wolle, Dial. X. A. pi. 62. f. 1. 6, pi 

 L890. 



irona Ehrenb. Ber. Akad. Wiss. Berl. 1844: 272. Km; Mikr e 

 X 1 ../'. .'/. A VII. f. 16. L854. Griff. & Henf. Micr. Dim. ed. 4. pi. 18. f. 

 L883. Pritch. Bist. Infus. ed. l. 832. pi ■'■./. 81. L861. 

 Sy8tephania diadema Ehrenb. Ber. Akad. Wiss. Berl. 1844: 272. L845; Mikrog. pi 

 XVIII.f. 11. 1854. Griff. & Benf. Micr. Diet. ed. l. pi. 18. i L883. 

 Pritch. Bist. tnfus. ed. 4.833. L861. Kiitz. Sp. Alg. 126. L849. 

 Stephanopyxis diadema Ehrenb. Ber. Akad. Wiss. Berl. 1845: 80. L846. Pritch. 



Bist. Infus. ed. l. 826. L861. 

 Pyxidicula diadema Kiitz. Sp. Alg. 21. L849. 



But '»nc specimen was found, identical with that figured by Schmidt.0 

 Found ai station 3696. 



Stephanopyxis trisculpta Mann. Bp. nov. Plate XLV, figi 



Valve hemispherical, covered with large hyaline regular bosses, giving an obscure 

 appearance of hexagonal network; no circle of Bpines, but instead of these short 

 knob-like processes interspersed aomewhat irregularly among the bosses or I 

 these processes almost wanting at the center, becoming frequent at one-half the radius 

 and from there outward increasing ami near the margin regularly filling all the inter- 



astr. Rep. Voy. Chall. Bot. 2: 88. pi 19. J. l .1886. 

 &Tran<. Micr. Soc. Lond. n. -. 13: ii. pi I.J 



Schmidt, Atlas pi ISO./. .. L888. 

 dCf. Schmidt, Atlas pi ISO. 

 ' Quart. Journ. Micr. s.i. 7: It)-"., pi 

 kschr. Akad. Wien 48-: 90. L884. 

 3< hmidt, Atlas pi ISO f. IS. L888. 



