KONGL, SV. VET. AKADEMIENS HANDLINGAR. B/VNl) 26. N:0 2. 25 



3. T. solidnia Ol. N. Sp. — V. strongly silicious, in the zonal view linear, with straight 

 dorsal margin, curved at the ends. L. 0,i9; B. 0,o2 mm. Central area indistinct. Transverse 

 striffi 14 to 15 in 0,oi mm., composed of distinct puncta forming undulating longitudinal strise, 

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



Marine: Remhang Bay (Uebys Coll.)! 



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

 in the middle. L. 0,i9 to 0,3; B. 0,025 to 0,036 mm. V. slightly convex, narrow, linear-lanceolate, 

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

 verse striae 16 in 0,oi mm. Longitudinal strise about 28 in 0,oi mm. — Amphiprora longa Cl. D. 

 of Arct. S. p. 20 PI. Ill f. 15. — Icon. n. PL III f. 8. 



Marine: Spitsbergen! Finmark! Grreenland! 



Yar.? gracilis Grun. (1880). — V. in L. 0,2 to 0,28; B. 0,oi6 to 0,oi8 mm. Wings obsolete. 

 Central area small, transversely dilated. Transverse stria; 16 to 17 in 0,oi mm., longitudinal finer. 

 Frustule linear, somewhat constricted, B. 0,o28 (ends) to 0,02i (middle) — Amphipr. 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,i2 to 0,2o; B. 0,03 to 0,o4, at the constriction 0,oi3 to 0,oi8 mm. Wings di- 

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

 apiculate ends. L. 0,i2 to 0,2o; B. 0,oi8 to 0,022 mm. Central area indistinct, or small, and trans- 

 versely lanceolate. Wing usually unilateral. Transverse striee 20 to 21 in 0,oi mm., finely 

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

 PI. 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. Amphipr. quarnerensis Grun. Verb. 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 striae 15 to 16 in 0,oi mm. 

 inside the wing, 14 in 0,oi 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 unilateral, at some distance from the median line. Central area small, 

 orbicular. Striae transverse, 16 in 0,oi mm., faint inside the wing. 



Brackish water: Africa, Cameroon! 



Var. minor Cl. — V. in L. 0,o8; B. 0,oi3, at the constriction 0,oi mm. Wing unilateral. Striae 

 20 in 0,01 mm. 



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



Var. delicatula Grev. (1863). — V. in L. 0,o64 to 0,075; B. 0,oi5 mm. Striae 26 in 0,oi mm. 



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



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



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

 Lepidoptera biit 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 Amphiprorae in A. D. 



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

 line. This diatom may perhaps be a Nitztchia. 



K. Sp. Vet. Akad. Handl. Bd 26. N:o 2. 4 



