f 



MANN DIATOMS OF THE ALBATllOSS VOYAGES. 259 



re])orio<l where it hii.s hvvu found aru hi Russia (i. o. Simbriskj Anuniiio, and Aroli- 

 arigiilHk-kurojedowf)), it would be interesting to know the geologiral outcrop that 

 furnished thiR».^pecimen» 

 Found at statif)n 33f)ril, Boring Sea. 



Coscinodiscus subtilis Pjhronb. Phys. Abh. Akad. Wiss. Berl. 1841: 412, pL 1. III. 

 f. IS, pi 3. ril.f. ',. ]84:i; Mikrog. pi. IS.f. S5, pi. .?.?, XTTI. f. -f, pi. SS. x'yi.f. 

 7, pi. 34. Vll.f. 0, pi J,5. XX IT. f. r,, pi 35. XX Til. f. ,7. ]854. P]hreiil). Thys. 

 Abh. Akad. Wiss. Berl. 1841: 438. pi I. III. f. 18. 1S1;5. Gr<>v. Quart. Ju urn. 

 Mirr. Sci. 7: 81. 1859. Pritdi. IILsL. Tiifus. ed. 4. 830. 18G1. Jan. Abh. Schl. 

 Ges. Vaterl. Cult. 1862-; 4. pi. lA.f. ,>. 18G2. Jan. Diat. Gaz. Exped. pi 2. J. 8. 

 Schmidt, Athis pi. 57. f. 11-16. 1878. H. L. Smith, Sp. Diat. Typ. no. 100. 

 Ratt. Proc. Roy. Soc. Edinl). 16; 4!J4. 1889. Do Tcmi, Syll. X\g. 2: 1232. 

 1894 (exclude Ehrcnl>. Phys. Abh. Akad. Wiss. Berl. 1841: 443. pi. 3. VII. f. 4. 

 1843. Grun. Denkschr. Akad. Wicn 48^': 81. pi S. f. 26. 1884. Ehrenb. 

 Mikrog. pi. 22. f. 4- 1854). 



r 



Rattray has inohided here several reference's Avhichart^ very <^uestional>Io.*J The two 

 vari(^ties described by him^ are very unsatisfactory and nnct'ilain examples of this 

 species^ Its boundaries are xuKpiesf ionably misty. It approaches (\ normanni 

 Greg,^ C\ odontophorns Grun,^ C. rolhii Ornu.j f\ .vjmnielricfis Grev., (\ fa.scicvlafus 

 Schmidt, C. denarius Schmidt. II. L. Smith's type no. 100 is truly typical. Com- 

 pare synonymy of C, normanni Greg. 



Found at stations 2844, 3526, 3604TI, ;}G07, 3635H, Aleutian Islands and Bering Sea. 



Coscinodiscus undulosus Mann, sp. nov, Platk XLIX, fiuurk 1. 



Frustuh^s small and very delicate; valves slightly and evenly convex; markings uf 

 oval l)eads elongated in the radial line, all of one size very small, arrangctl in radiat- 

 ing rows, l)ut so spaced in the rows as to produce a unif(tnn dehcate wavy appearance 

 over the entire valve; border modorat(4y broad, p(^rfectly smooth. A fragih^ and 

 handsome species, found only in the f(41owing dnnlging, there quite abunchmt. 



Diameter of valve, 0.125 to 0.i3fi mm. 



Type in the U. S, National Museum, No. 590121, from station 352G, liering Sea, 

 August 5, 1893; 49 fathoms, bottom of fine sand and dark mud. 



Coscinodiscus verecundus Mann^ sp. nov. Plate Ij, figure 1. 



Valve nearly flat; central area v(Ty miimte or wanting, marking of minute beads, 

 the largest at the center and regularly decreasing to the border; arrange^d in indistinct 

 fascicles, 12 to 14 in number, irregular in width, showing the -watch-milling effect of an 

 Actinocyclus; l)orde.r of two distinct portions equal in wi<lth, namely, each about one- 

 twentieth the radius; the inner portion a smooth band (>rnamented with (^venly set, 

 large l)ut dim beads in a single circh^; the outer portion strongly marked with trans- 

 verse (radial) striae, slightly wider on tlu^ outer side. TIkj entire valve most delicate 



and pellucid. 



Diameter of valve, 0.078 mm. 



Type in the IT. S. National Museum, No. 500122 from station 3088II, Okliotsk 

 Sea, August 27, ISOG; 1,5(52 fathoms, bottom of brown mud and fine sand. 



f* Jan. Diat. Gaz. Exped. j)l. A- J- ^-2 (named C. Icniiginosus Jan.), pi. 5. /. 7, pL 6. 

 f. /, 5, pL 20. f. 5. Schmidtj Atlas jjL />7./. 28-29 (no name), pL 58. f. 37 (no name). 

 1878. Van Heur. Synop. 218. pi ISUj, 1. 1881-1885 (as C, subtilis Ehrenb.? in text 

 and C. normannicus Greg, in plate). 



f^Proc. Roy, Soc. Edinb. 16: 497. pi l,f, 10, pi ^^./. 0. 1889. 



