MANN DIATOMS OF I III. ALBATROSS VOYAi '.],.) 



there are. A.1 an\ rate, it is clear Grunow has overlooked Gregory's clear characteriza- 

 tion of his species," in which he expressly states thai In- former figure* is incorr< d and 

 probably denotes another species. Be goes on to say: "The markings are entire, 

 coarse, Bubdistant, about 12 in 0.001. Between the lateral segments are from five 

 to eight con\ erging bars, marked with the same subdistanl entire striae. In one I 

 qoI here figured, nothing is Been bul bars from one side to the other, which are thus 

 eight or nine in number." II'- then refers to various localities where he has found this 

 form, showing thai it is constanl in its characters. If the contour of Amphora, inde- 

 pendent of its markings, were to be considered the specific mark of distinction, then my 

 species and the figure in Schmidt's Atlas ' might be classed as broad varietiesol i 

 ory's form; and to these would have to be added many other otherwise valid 

 this winged contour is nol al all uncommon in the genus. Bui such is not th< 

 and the above, together with the figure t rregory excludes from his crassa in the citation 

 already made, must rank separately. Prof. II. L. Smith in his Conspectus of Am- 

 phora, d correctly described and figured .1. reg. Be then- favors its union 



with .1. snlca i a Breb., according to < rrunow's suggestion, but the merits of this question 

 do not enter into the present case, as my form is equally unlike both of these. It is 

 certain thai whatever be the interpretation of Schmidt - - blurred figure, the specimen 

 here named and figured can not be referred to 1 rregory'a A. c assa. 

 Amphora honshuensis Mann. >[>. nov. Pi \n \I.IY figi re I. 



Valves broadly rounded, the margin on the ventral side concave and parallel to the 

 convex dorsal margin, until, near the ends, they both con 1 _ form the broad, 



rounded apices; raphe beginning at the center, close to the ventral margin, curving 

 sharply backward toward the dorsal side and terminating in two large beads i I 

 th«- dorsal margin, but Borne distance from the rounded apices; striae of very fine bead- 

 ing, • xtending from the dorsal and ventral margins*to the raphe, leaving no hyaline hand 

 (.n either Bide of it ; a small Innate, hyaline area bel ween the two central nodules of the 

 raphe and the ventral margin; valve depressed at the center in a broad shallow trans- 

 hollow, the two halves on either Bide rising above this like lobes; on account of 

 this central depression and the elevation of the two halves the li] - !in_ r on the 



dorsal side of the raphe, although approximately transverse, appearing in the hollow 

 to bend convexly from each other, then halfway toward the ends to become trans 1 

 and near the broad, rounded extremities to again become curved with the concave 

 curvature inward; on the ventral Bide of the raphe the lines of beading, which are 

 equally minute, beginning at the hyaline Innate area before mentioned, somewhat 

 inclined toward the center and transverse only on nearing the rounded end-: these 

 Lines on the ventral side somewhal irregular, producing a wavy appearance; valves 

 .•cry delicate and diaphanous. Name referring to proximity t" Bonshu I -land. Japan. 



Length of valve, 0.16 mm.: width of valve, 0.04 mm. Striae, 85 to 88 in 0.1 mm. 



Type in the U. s. National Museum, ne. 590154, from station 3698, off Bonshu 

 Island, .hi pa n. May 5, 1900; 153 tat hem.-, bottom of green mud, volcanic ashes, and sand. 

 Amphora mexicana Schmidt, Atlas pi. 2 7. f. . * not/. 49). 1875 DeToni,Syll. 

 Alg. 2: 109. L891. Cleve, Sv. Vet. Akad. Bandl. 26 2 : 105. pi. 4.f. 15. 18 



Amphora warherihiisenii Jan.; Schmidt, Atlas pi. - Ixped. 



pi /.<./ 



Amphora boryana Pant. Bacill. Ung. 2: 36. 1889; 3: pi. , 5 1893. 



There is no appreciable di fference between the above. It may also be that 

 Schmidt* should be added to the Bynonyms; although the absei I the curved 



" Tran- R Soc. Edinb. 21: 524. j L857 



&Trans. Micr. Soc. Lond. n. -. 5: pi. /./. 35. L857. 

 ■■/»/. L875. 



''The Lens 2: 76. pi. .'./. 5. 1873. 

 Schmidt, Atlas pi. 875 



31713 voi 10, n •". "7 — 11 



