88 p. T. CLEVE, SYNOPSIS OP THE NAVICULOID DIATOMS. 



Var. Puella A. S. (1875). — L. 0,o636 to 0,io6; B. 0,oi66 to 0,o26; at the constrict. 0,oo75 

 to 0,0 ir> mm. Transverse costse 6 to 9 in 0,oi mm.; longitudinal 2 to 3 on each side of the median 

 line, less distinct. — Nav. Puella A. S. Atl. XII f. 13; LXIX f. 15. Nar. cxemta A. S. N. S. D. 

 p. 85. PI. II f. 5 (1874). Atl. LXIX f. 13. 



Marine: North Sea (A. S.); Sorrento (Atl.), Campeachy Bay (Atl.), California (Atl.). 



Under the name Nav. Puella A. Schmidt seems to have confounded different forms. The 

 figs. 14 and 15 PL XII probably do not represent the same form as the fig. 13. The fig. 13, w^hich 

 I regard as the most typical, is evidently a small variety of D. splendida. A. Schmidt seems also 

 to have denoted two different species as Nav. exrmta. 



Var. diplosticta A. S. (1875). — With fine puncta above the reticulation of the costse. — 

 Nav. diplosticta A. S. Atl. XIII f. 25 to 30; LXIX f. 22, CLXXIV f. 10 (no punctation visible). 



Marine: Campeachy Bay (Atl.), Gulf of Mexico (Atl.), Java, Samoa (Atl.), Cape Horn (Petit). 



Var.? Haynaldii Pant. (1889). — V. slightly constricted. L. 0,09i to O.is; B. 0,o28 toO,o4; 

 at the constr. 0,02 7 to 0,0 2 8 mm. Central nodule quadrate, vpith parallel horns. Furrows narrow, 

 linear, with a row of puncta. Transverse costis radiate at the ends, 8 to 10 in 0,oi mm., crossed 

 on each side of the median line by about 8 longitudinal, slightly undulating costee. — Nav. Hay- 

 naldi Pant. II p. 47 PI. XXIV f. 361. 



Marine: Hungary, Bory, fossil! 



The fig. in Pantocsecs work is not very clear. The above description is from specimens 

 from Bory, which agree in all eventials with Z). splendida, being only a little less constricted and 

 having finer structure than usual. 



Var.? j3rom«WMZ« A. S. (1875). — V. strongly constricted. L. 0,042; B. 0,oi9; at the constr. 

 0,013 mm. Transverse costse 8 in 0,oi mm., crossed by some few longitudinal costse. — Nav. pro- 

 minula A. S. Atl. XIII f. 15. 



Marine: Kings Mill Island (Atl.). 



This form requires a more accurate examination before its true place in the system can be 

 determined. 



Var.? ehsdiana Pant. (1886). — L. 0,o7 to 0,i; B. 0,026 to 0,03; at the constr. 0,02 to 

 0,028 mm. Segments tongue-shaped. Transverse costse 8 in 0,o) mm.; longitudinal numerous, about 

 8 on each side of the median line. — Nav. elesd. Pant. I p. 42 PI. XVII f. 152. 



Marine: Hungary, fossil (Pant.). Baltjik, fossil! Russia, fossil (Deby). 



Nav. Margarita A. S. (Atl. CLXXIV fig. 17) seems to be akin to var. elesdiana. I have 

 not seen any form exactly resembling this, but I think it very probable, that the figured specimen 

 would in another focus have very much the same appearance as some of the numerous varieties 

 of D. splendida. 



37. D. bomlboides A. S. (1874). — V. panduriform, with subelliptical to tongue-shaped 

 segments. L. 0,09 to 0,13; B. 0,04 to 0,055; at the constr. 0,03 to 0,o35 mm. Central nodule 

 strong, quadrate; its horns parallel. Furrows linear, somewhat dilated around the central nodule. 

 Transverse costse 6 to 7 in 0,oi mm, crossed by numerous slightly undulating, longitudinal costse, 

 about 6 in 0,oi mm. — Nav. bomboides A. S. N. S. D. PI. I f. 2. Atl. XIII f. 36. V. H. Syn. 

 Suppl. B f. 19. Nav. didyma W. Sm. B. D. XVII f. 154 a*. Nav. WilUamsonii V. H. Syn. 

 PL IX f. 3. 



Marine: North Sea! Alexandria (Deby Coll.)! Zanzibar (Atl.), Madagascar! Ceylon! Philip- 

 pines! Sydney! China! Japan! Galapagos Islands! Campeachy Bay! 



Var. madagascarensis Cl. — V. short, slightly constricted, with broad, tongue-shaped seg- 

 ments. L. 0,04 to 0,085; B. 0,022 to 0,043; at the constr. 0,02 to 0,035 mm. Transverse costfe 7 

 to 9 in 0,01 mm., slightly radiate. Longitudinal costse almost straight, curved outwards in the 

 middle of the valve. — A. S. Atl. LXIX f 35 (small form). — PL I f. 22. 



Marine: Madagascar (Kinker a. Brun Coll.)! Cape Good Hope (Atl.)! Manilla (Dfeby CoU.)! 



