KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 26. N:0 2. 99 



Var. typica Cl. — V. not constricted. L. O, oss to 0, 19; B. 0,u3 to O.otj mm. Costtfi 4 in 

 0,01 mm. — Nav. gemmata Gkbv. Ed. N. PIi. J. X July 1859 p. 30 Pl. IV f. 7. Nav. gemmata 

 var. hiseriata Grun. Novara 100 Pl. I A f. 16. Nav. gemmata var. npedahilis Grun. A. S. Atl. 

 VIII f. 38? Nav. Basilica Brun. D. espéces n. p. 32 Pl. XV f. 14 (1891)? Nav. pseudogemmata 

 Pant. III Pl. XXIX f. 420 (1893). 



Marine: Grulf of Naples! Nos.sibé! South Sea (Van Heurck Coll.)! CTalapagos Pslands! Cam- 

 peachy Bay! West Indies! Fossil: Huiigary (Pant.), Moravian Tegel! Nankoori! Californian 

 Guano (Grev.). 



In tlie coll. of Prof. Brun I have seen a specimen from Sendai, wliicli agrees witli his Nav. 

 Basilica and is only a somewhat elliptical form of B. gemmata. 



Var. minor Cl. — L. 0,09 to 0,i6; B. 0, 027 to 0, 035 mm. Costaj 5 in 0, 01 mm. — A. S. Atl. 

 LXX f. 73. 



Marine: Balearic Islands! Madagascar! Colon (Deby Coll.!), Jamaica (Atl.). 



Var. pundata Cl. — L. 0, 14; B. 0, 04 5 mm. Costae 5 in 0,oi mm. Furrows witli transverse 

 rows of large puncta. Costte alternating at their interiör ends with one or in the middle with 

 two large ocelli. 



Marine: S:n Pedro, Calif. (Kinker Coll.)! 



Var. spectalnlis Grun. (1860). — L. 0,o62 to 0,17; B. 0,025 mm. Costfe 3 to 5 in 0, 01 mm. 

 contini^ed across the furrows. — Nav. spectaljilis Grun. Verh. 1860 p. 533 Pl. III f. 11. Nav. 

 Grunoivii Rabh. Fl. E. Alg. p. 203 (1864). 



Marine: Adriatic (Grun.), Sumbava (Kinker Coll.)! Fossil: S:t Peter, Hungary. 



Var. oamaruensis Cl. — V. slightly constricted. L. 0,i6; B. 0, 04 mm. Horns of the central 

 nodule raore distinct and distant. Furrows with faint markings of the costee which beconie strong 

 along the horns. Costfe 5 in 0,oi mm. alternating near the furrows with two large ocelli. 



Marine: Oamaru, New Zeeland, fossil! 



Var. madagascarcnsis Cl. — V. narrow, very slightly constricted. L. 0,13; B. 0,024 mm. 

 Horns distinct and somewhat distant. Furrows with two longitudinal rows of puncta along the 

 horns. Costte 6 in 0, 01 mm. 



Marine: Tamatave (Kinker Coll.)! 



Var. pristiophora Jan (1881). — V. distinctly constricted in the middle. L. 0,i to 0,i5; 

 B. 0,02s to 0,036 mm. Costte 5 to 6 in 0, 01 mm. — Nav. pnistiophora A. S. Atl. LXX f. 72. 



Marine: Morocco! Porto Seguro (Deby Coll.)! Leton Bank (Atl.). 



Forma minuta Cl. — L. 0, 05 7; B. 0,oi5 mm. Costte 7 in 0, 01 mm. 



Marine: Macassar Straits! 



D. gemmata is very variable, and by the form madagascarcnsis neaily connected with D. 

 contigtia, which may perhaps be only corroded specimens of D. gemmata. 



76. D. Szontaghii, Pant. (1886). — V. elliptic-linear, with broad, rounded ends. L. 0,o3 to 

 0,06; B. 0,0 16 to 0,022 mm. Central nodule large, quadrate; its horns distinct and distant from 

 the median line. Fuitows narrow, linear, with a row of large puncta (spaces between the rudi- 

 mentary costtie). Costte 5 in 0,oi mm. alternating with double rows of twice as close alveoli 

 (on corroded specimens alternating with single rows of larger puncta). — Nav. Szont. Pant. I 

 p. 29 Pl. III f. 25. Pl. XXVIII f. 284. Icon. n. Pl. II f. 7. 



Marine: Sumbava (Kinker Coll.)! Hungary, fossil! 



77. D. Ciiiupylodiscvis Grun. (1875). — V. suborbicular. L. 0,o38 to 0, 05; B. 0,o26 to 

 0,0 3 mm. Central nodule large, quadrate, its horns strong, distant, and convergent in the middle. 

 Furrows broad, with faint costte.. CosttE 4 in 0, 01 mm. alteimating with double rows of faint 

 alveoli. — Nav. suhorhicularis var. Nankoorensis Grun. Novara p. 100 Pl. I A. f. 15 (1867). Nav. 

 Campylod. Grun. A. S. Atl. VIII f. 9, 10, 12, LXX f. 64, 65. Cocconeis coelata Walker Arn. 

 M. J. II p. 234 Pl. X f. 5, 6 (1862)? 



