p.~' - - 



I 



MANN^DTATOMS OF THE ALBATEOSS VOYAGES. 283 



Auliscus pruinosus r>aiL Siuil.hson. Contr. Knowl. 7: 5. j)l. 1. f. 5-8. 1854. Orcv. 

 Trans. Micr. Soc. Lond. n. h. 11: 48. pi. S.f. UL m\?.. II. L, Siiiilh, Sp. T)ia.L 

 Typ. TOf). 1874. PritclK llist. Infus. ed. 4. 845. pj. 6.f. 1. JHOl. Schmidt, Atlas 

 pi. 31, f. 6-7, n, 13-15, pi. 32. f, .'). 1875; pi. lOS.f. 10. 1880. Rait. Journ. Hoy. 

 Mior. hoc. 8h 22. 1888. D(^ Toni, Syll. Alg. 2: 1045. 1894. Moeb, Diat.-taf. 

 pi 51. f. IS, 18110. 

 Auliscus punctatils l>ail. Siuithsoii. Contr. Kiiowl. 7: 5, 2^?. 1./. 9. 1854. Grev. 

 Trans. Micr. Sue, Lond, n. s, 11: 19. pi, 3. f. 15. 18G3. Moch. Diat.-taf. pL 51. 



/. 15, 1890, Schmidt, Atlas pi. 31. f. S. 1875; />/. Gl.f. 7-8. 1881; pZ. 5^?./. Li-ll 

 pi lOS.f, 10, 188G. Katt. Journ. Roy. Micr. Sue. 8'-: 9. 1888, De Toni, Syll. 

 iWg. 2: in:5.3. 1894. 



Tluu'e h great (^)nfiibion between these twi) species of Bailey. The original type 

 forniSj as can be ^seen by (comparing th(^ figui'cs of Bailey or those of Greville, ishow 

 (xmsidcTabloconlrast; butattlie pr^^sent tijnt^ <tno might as well assign a newly found 

 example to one species as to IIk^ other. Rattray lias retained the two species, thougli 

 placing examples of A. pruinosus'^ under .4. panrtatus. The two species have no 

 dit=tinct boundary. In the single dredging in which these forms were found th( y are 

 very abundant and sui)ply every gradation between the two. It is to be noted, also, 

 that Hailey was in considerable doubt over the separateness of these species, and it 

 seems to me thev are much better united. Xothinij: can better ilhistrat(; the useless- 

 iiess of trying to assign specimens to out* as against the other than a comparison of the 

 two figures lying side by sidt: in S(^hmi(h's Atlas, pUxte 31, figvirea 7 and 8, named, 

 despite their identity, ^^ pruinosus^'^ and ^^ pnnctahiSj^'' respectively. No wonder that 

 two such capabh* diatomists as Grunow and Witt should call the on<^ pruinosus and 

 1;h(^ oihvr piinctatus J the diatom reprt^sc^nted by plate 108, figure 10, of Schmidt's Atlas. 



Found at station 2807 j Galapagos Islands. 



Auliscus stockliardtii Jan. Abh. Schles. Ges. Vaterb Cult, 1861-: 1C3. pi U f, 4' 

 18G1. Schmidt, Alias pi 30. f. 11 13, 1875; pi 67. f. 6. 1881. Ratt. Journ, Roy. 

 Micr, See. 8-: 7. 1888, Do Toni, Sylb Alg. 2: 1031. 1894. 



Auliscus coustdlaius Mills, Journ, Roy, Micr. Soc II. 1: 867. pi lUf, 2-3. 1881. 



Auliscus racemosus Ralfs, Trans. Micr, Soc. Loiul. n. s. 11: 4(>, pi 2, f, 9. 18G3. 

 Schmidt, Atlas pi 67./. 6. note. 1881, Moeh. Diat.-taf. pi 50./. 9. 1890, 



I am in doubt as to making A racemosus Rnlfs a synonym of the above as Schmidt 

 and Rattray have done. At least, a comparis(»n of the original ii<;ure of Janisch with 

 that of Ralfs in the citations given above will show enough divergence to make the 

 matter questionable. Certain varieties of ^4. pruinosus Rail, approach this species. 



Found at station 2807^ Galapagos Islands. 



RHIZOSOLElSriA Ehrenb, 



Rhizosohnia Ehreid>, Rhys, Abh. Akad. Wiss, r>erb 1841; 329. 422. 1843; Ber. 



Akad. Wiss. ISerl. 1844: 204. 1845. Kutz. Racill. 51. 1844; Sp. Alg, 24. ]819. 



Bright. Quart. Journ. Micr. Sci. 6: 93. pi 5. 1858, char. enuMid. Pritch. Hist, 



Infus. ed. 4. SG5. 18G1. Van Hour. Synop. 194. pi 78-79. 1881; Treat. Diat. 413. 



/. 133. 1S9G. Griff. & Ilenf. Micr, Diet. ed. 4. G57. pi 51. f. 25. 1883. De Toni, 



Syll. Alg. 2: 823. 1894. Eng. A Pr. Pnanzenfam. V^' 84./ 139-140. 189G. 



Perag. Le Diatomiste 1: 108, pi 1-5, 1892. 

 E^fcampia Stolter, Journ. Roy. Micr, Soc. 2: 835./ a-d. 1879, not Ehrenb. 

 AUheya West, Trans. Micr, Soo. Lond. n. s. 8: 152. pi 7. / 15. 18G0. De Toni, 



Syll. Alg. 2: 770, 822. 1892-94. Perag. Lc Diat<imiste 1: 105. pi l.f. 14. 1892. 



Van Heur. Treat. Diat, 420./ 13S, 1896. Eng. & Pr. Pflanzenfam. 1^^>: 88./ 145, 



1896, 



« Schmidt, Alias pi 3Lf. 6-9. 1875. 



