KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 26. N:() 2. 2.') 



3. T. solidula Cl. N. Sp. — V. strongly silicioiis, in tlie zonal view linear, with straight 

 dorsal margin, curved at the ends. L. 0,i9; B. 0, 02 mm. Central area indistinct. Transverse 

 striee 14 to 15 in O, o 1 mm., composed of distinct puncta forming undulating longitudinal strise, 

 about 14 in 0,oi mm. — Pl. II f. 19, 20, 21. 



Marine: Rembang Bay (Debys CoU.)! 



4. T. longa Cl. (1873) — Frustnle narrow, rectangular, with parallel margins, not coustricted 

 in the middle. L. 0, 19 to 0,3; B. 0,02.5 to 0,036 mm. V. slightly convex, narrow, linear-lauceolate. 

 acute. Wings distinct, on both sides of the median line. Central area large, transverse. Trans- 

 verse stricE 16 in 0,oi mm. Longitudinal strite about 28 in 0, 01 mm. — Amphiprora longa Cl. D. 

 of Aret. S. p. 20 Pl. III f. 15. — Icon. n. Pl. III f. 8. 



Marine: Spitsbergen! Finmark! Greenland! 



Var.? gracilis Grun. (1880). — V. in L. 0,2 to 0,2 8; B. 0,oig to 0,oi8 mm. Wings obsolete. 

 Central area small, transversely dilated. Transverse strige 16 to 17 in 0,oi mm., longiti^dinal finer. 

 FrustT-ile linear, somewhat constricted, B. 0, 028 (ends) to 0,021 (middle) — Amphqir. elegans v. 

 gracilis Grun. A. D. p. 64. 



Marine: Adriatic (Grun.). 



5. T. Lepidoptera Greg. (1857). — Frustule elongated, rectangular, strongly constricted in 

 the middle. L. 0, 12 to 0, 20; B. 0, 03 to 0, 04, at the constriction 0, 013 to 0,oi8 mm. Wings di- 

 stinct, usually projecting above the central nodule. V. linear-lanceolate, with acute and frequently 

 apiculate ends. L. 0, 12 to 0,20; B. 0,oi8 to 0,022 mm. Central area indistinct, or small, and trans- 

 ver.sely lanceolate. Wing usually unilateral. Transverse strige 20 to 21 in 0, 01 mm., finely 

 punctate. — Amphiprora Lexndoptera Greg. T. M. S. Vol. V. p. 76. Pl. I f. 39. D. of Clyde p. 505 

 Pl. XII f. 59 (not. c). Rabh. a. Jan. Honduras D. p. 3. Pl. III f. 5. V. H. Syn. p. 120 Pl. 

 XXII f. 2, 3. Ämphipr. qtiarnerensis Grun. Verh. 1860 p. 569 Pl. VII f. 1. Amphipr. mediter- 

 ranea Grun. 1. c. Pl. VII f. 3 (not V. H. Syn.)? 



Marine: Finmark! North Sea (Sweden! England! France!) Adriatic! Macassar Straits! 

 King George's Sound! Sumatra! Port Jackson! Galapagos Islands! Colon! Barbados! 



Var. samoensis Grun. (1880). — Frustule elongated, strongly constricted in the middle. L. 0,2; 

 B. 0,05 mm. Wings distinct, not projecting beyond the central nodule. V. lanceolate, acute. L. 0,2 

 to 0,26; B. 0,03 to 0,037 mm. Central area indistinct. Transverse strife 15 to 16 in 0,oi mm. 

 inside the wing, 14 in 0, 01 mm. outside the wing. Wings on both sides of the median line. — 

 Amphipr. Lepidopt. var. samoensis Grun. A. D. p. 65. 



Marine: Samoa! Tahiti (Grun.), Honolulu (Grun.). 



Var. prohoscidea Cl. — V. linear-elliptical, apiculate. L. 0,075; B. 0,oi8 mm. Median line 

 slightly excentric. Wing unilatei-al, at some distance from the median line. Central area small, 

 orbicular. Striie transverse, 16 in 0, 01 mm., faint inside the wing. 



Brackish water: Africa, Cameroon! 



Var. minor Cl. — V. in L. O, os; B. O, o 1,3, at the constriction 0, 01 mm. Wing unilateral. Striae 

 20 in 0,01 mm. 



Marine: St. Lunaire (Temp. Perag. Types N:o 292 as T. Van-Heurclii). 



Var. delicatida Grev. (1863). — V. in L. 0,064 to 0,075; B. 0,oi5 mm. Striae 26 in 0, 01 mm. 



— Amphipr. delic. Grev. Edinb. N. Ph. J. XVIII p. 36 f. 15, 16. 



Marine: Cette! Woodlark Island (Grev.), Labuan! 



Amphiprora indica Grun. (Verh. 1860 p. 570, Pl. VI f. 13, Pl. VII f. 2) resembles Trop. 

 Lepidoptera but is described as having a row of puncta along the median line. I have seen no 

 specimen of this form, ■which Grunow does not mention in his synopsis of the Amphiprorce in A. D. 



— Amphiprora didyma W. Sm. (B. I). I p. 44, Pl. XV f. 125) bas also puncta along the median 

 line. This diatom may perhaps be a Nitztchia. 



K. Sv. Vet. Akad. Handl. Bd 26. N;o 2. 4 



