■^^ ^ 



MA]S^:N DIATOMS OF THE ALBATROSS VOYAGES. 375 



tliere are. At any rate, il is clear Grunow has overlooked Gregory's clear characteriza- 

 tion of lii« species," in which he expressly states that his former figure^ is incorrect and 

 probably denotes another species. He goes on to say: ''The markings are entire, 

 coarse, subdistant, about 12 in 0.001. Between the lateral f?egments are from hve 

 to eight converging bars, marked with tlu^ same subdistant entire striae. In one focus. 

 not here figured, nothii^ is seen but bary from one side to the other, which are thus 

 eight or nine in number/' He then refers to vniunis localities where he has found this 

 form, showing that it is constant in itt^ cluiracters. 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 c miglu be classed as broad varieties of Greg- 

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

 this winged contour is not at all uncommon in the genus. But such is not the case; 

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

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

 phora/ correctly described and figured A. crassa Greg. He there favors its union 

 with .1. sulcala Breb., accoiding to Grunow'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 that whatever be the interpretation of ScJnnidt's bhirred figure, the specimen 

 here named and figured can not be referred to Gregory's ^4. crassa. 



Amphora honshuensis Mann, sp. nuv. Plate XhlV, figure ] 



Valves broadly rounded, tlie margin on the ^Tnt^al side concave and parallel to the 

 convex dorsal margin, until, near the ends, tliey both converge to form the broad, 

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

 sharply backward toward the (bursal side and terminating in two Lirge beads close to 

 the dorsal margin, l)ut some distance from the rounded apices; striae of very fine bead- 

 ing^ (extending from the dorsal and ventral margins'to the raphe, leaving no hyaline band 

 on either side of it; a small lunate, hyaline area between th(^ two central nod ides of the 

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

 verse hollow^, the two halves on either side rising above this like lobes; on account of 

 this central depression and the elevation of the two halves the lin(^s of Ix^ading on the 

 dorsal side of the raphe, althougli approximately transverse, apptnuniig in the hollow 

 to bend convexly from each other, then ludfway toward the ends to Ijecome transverse, 

 and near the broad, roundcnl extremiti(\s to again become cur^■ed with th(; concave 

 curvature inward; cm the ventral side of the raphe the lines of bc^ading, which are 

 equally minute, beginning at the hyaline lunate area before nuMitioned, somewhat 

 inclined toward the center and transvers(? only on n(^aring the roundcnl ends; these 

 lines on the ventral side somewhat irregular, producing a wavy appearance; valves 

 very delicate and diaplianous. Name referring to proximity to Honshu Island, Japan. 

 Length of valve, O.IG mm.; width of valve, 0.04 mm. Striae, 85 to 88 in 0.1 mm. 

 Type in the I.\ S. National Museum, no. 5D0154, from station :>G98, off Honshu 

 Island, Japan, May 5, 1900; 153 fathoms, bottom of green mud, volcanic ashes, and sand. 



Amphora mexicana Schmidt, Alias pL 27. f. 47-48 (not/ 40). 1875. De Toni, SylL 

 Alg. 2: 409. 189L Gleve, Sv. Vet. Akad. liandL 26': 105. pi 4 J- J5. 1895. 

 AmpJiorawachenhns€nii^':\n.; Sclimidt, Atlas pi. 40. f. 38. 1876. Diat. Gaz. Exped. 



pi. 22. f. 4-7. 



Amphora horyana Pant. Bacill. I'ng. 2: 'My. 1889; 3: pi. 38. f. 531. 1893. 



There is no appreciable di fference between the abov(\ It may also be that .4. oculus 

 Schmidt^ should be added to the synonyms; although Ihe absence of the curved 



"Trans. Key. Soc. EdiidK 21: 524. pi. 14.f. 94a-d. 1857. 



& Trans. Micr. Soc. Lend. n. s. 5: pi. l.f. 35. 1857. 



rPL 28. f. 32, 1875. 



^The Lens 2: 76. pi 2,f. 5. 1873. 



^ Schmidt, Atlas pi 27./. 52. 1875. 



8171H— "VOL 10, PT 5—07 11 



