On some New Species of Nitzschia. By A. Grunoiv. 397 



Sectio Lanceola.t^. 



N. ampMcephala, Grun. I. c— Small, valves narrow, linear 

 lanceolate, with capitate ends. Carinal pimcta 13 in 0"01 mm., 

 transverse striae 27 in 0"01 mm. Length, 0*02-0 "08 mm.; 

 breadth, 0'0035. In Salpsa spinosa from Southern Sea. PI. 

 XII. Fig. 9, a, 6,-^\ 



GOMPHONITZSCHIA GrUN. 



G. Ungeri, Novara Exp., Tab. 1, fig. 1. — I have given here a 

 better delineation of this interesting diatom which represents the 

 Goniphonema types in the family Mitzschieae. 



Carinal puncta 10 in 0" 01 ; transverse striag 21 in O'Ol mm. 

 Egypt, on Cladopliora {leg. Professor Unger). PI. XIII. Fig. 17, 

 a, h, c, '-r- 



G. (?) Clevei Grun. I. c. — Very long, with narrow clavate 

 valves rounded at the base and cuneate at the summit, with 

 numerous transverse costae (4^-8 in 0*01 mm.), which are often 

 bifurcate on the carinal scale. I have not delineated the very fine 

 striation (transverse and longitudinal) between the costae. Trans- 

 verse striae circa 24 in O'Ol mm.; longitudinal, fiue, indistinct. 

 Length, exceeding • 28 mm. ; breadth of valve, lower part, • 006 

 mm., upper part, 0"0I4 mm. In a gathering from Batavia, com- 

 municated by Professor Cleve, very rare. PI. XIII. Fig. 11, a 

 upper, h lower portion of valve, -[°. 



Hantschia Grun. 



if. WUtii Grun. I. c — Valve with cuneate blunt apices, linear, 

 with ventral sides constricted in the middle. Carinal stride short 

 in the middle, longer towanls the ends (4-5^ in 0-01 mm.); 

 transver.se striae mouiliform, 10^- in O'Ol mm. Length, 0- 070 ; 

 l)readth of valve in middle. 0'0075 mm., near the ends 0"01 mm. 

 West Indies. PI. XIII. Fig. 12, ■■"}"-. 



II. amjyhioxis var. aitiphilepta Grnn. I. e. (Eunotia amphi- 

 lep)ta Ehr. ?). — lOnds of valve produced into a narrow beak. Carinal 

 puncta .short, 5-6 in 01 mm. ; transvei-se strim monilitbrm, 11^ 

 ill 0-01. Length, OOrvMJ-OOo ram.; breadth of valve, 0-006 

 mm. Bengal. PI, XII. Fig. 8, a, h, "p. 



