28 BULLETIN 100, UNITED STATES NATIONAL MUSEUM 



AMPHORA TUMULIFER, new name 



Plate 4, fig. 3 



Valve elongated, massive, dorsal side consisting of six strong sinu- 

 ations; ends blunt and rounded, not incurved; ventral side double- 

 bowed, with a shallow depression at the center; markings of coarse, 

 transverse, somewhat wavy, moniliform lines, extending from the 

 dorsal side across the rhaphe to the ventral side; the rhaphe approach- 

 ing the ventral side at the center and ends, each half slightly bowed 

 upward toward the dorsal side. 



Length, 0.065; width, 0.016; lines, 10.3 in 0.01 mm. 



This diatom is well illustrated in Schmidt's Atlas, plate 25, figure 

 80, but is misnamed A. sarniensis Greville, with however a question 

 mark. It can not be united with that species (see the original in 

 Micro. Journ., 1862, pi. 9, fig. 12, a figure well reproduced in Schmidt's 

 Atlas, pi. 25, fig. 73). Fricke's Index repeats this name, but also 

 questions it. Cleve (Nav. Diat., vol. 1, p. 120) unites this with fig- 

 ures 78-79 of Schmidt's Atlas, same plate, making it a new species, 

 A. tetragibba Cleve, an impossible combination. De Toni (Syl. Alg., 

 p. 394) prefers to join figures 78-79 with A. sinuata Greville, which 

 is at least admissible. (See also Greville, So. Pac. Diat., pi. 2, fig. 5, 

 and H. L. Smith, Lens, p. 81, pi. 3, fig. 8.) A. sinuata has a straight 

 rhaphe about equidistant from the ventral and dorsalsido, different ends 

 and no such coarse lines as this species. H. L. Smith writes that they are 

 "obscure." A. dorsalis Cleve and Grove (Le Diat., vol. 1, pi. 32, fig. 15) 

 resembles this species slightly, but the description (p. 158) shows that 

 the resemblance is only superficial. Its nearest relative seems to be A. 

 camelus Cleve and Grove, when seen in the position shown in Le 

 Diatomiste, volume 1, plate 22, figure 12. 



AMPHORA TURGIDA Gregory 



(Gregory, Diat. Clyde, pi. 12, fig. 63; Schmidt, Atlas, pi. 25, figs. 22-23, 

 27-28, 31.) 



AMPHORA WEISSFLOGII A. Schmidt 



(Schmidt, Atlas, pi. 25, figs. 58-59.) 



Genus ANISODISCUS Grunow 



ANISODISCUS ADEEI, new species 



Plate 6, fig. 1 



Valve circular, nearly flat; a central circular hyaline area, about 

 one-third the radius, surrounded by an area of slightly greater width, 

 ornamented by beads widely set apart with equal spacing, but pre- 

 senting only an indistinct radial arrangement; this in turn surrounded 

 by an outer area, about one-half the radius, ornamented with 18 to 

 24 radiating rows of double beads; interpolated between these near 



