KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 26. N:0 2. 181 



G. angustatum var. intermedia Grun. in V. H. Syn. PI XXIV f. 47, 48. G. angustuni Br^ib. 

 (fide Grun.). 



Fresh water: Finland! Sweden, Upsala! Gothland, Visby in slightly brackish water (a var. 

 with coarse strise, 8 in 0,oi mm.), Kansas River! Ecuador! 



Var.? tergestina Grun. (1880). — V. lanceolate, with obtuse, truncate ends. L. 0,oi5; B. 0,oo4 

 mm. Central area unilateral, very broad, reaching to the margin. Striae 14 in 0,oi mm. — 

 G. semiapertum var. tergestina Grun. in V. H. Syn. PI. XXV f. 40. 



Triest (Grun.). 



3. G. angustatum Kutz (1844). — V. slightly clavate, linear, with broad, rostrate to sub- 

 capitate apex and basis. L. 0,03 to 0,04; B. 0,oo7 mm. Axial area not distinct; central area uni- 

 lateral, stigma indistinct. Strite transverse 10 to 12 in 0,oi mm. indistinctly punctate. — Sphenella 

 angustata Kutz Bac. p. 83 PI. VIII f. 6. G. cotmnune Habh. F1. E. Alg. p. 283 (1864). G. angusta 

 V. fl. Syn. p. 126 PI. XXIV f. 49, 50. 



Fresh water: Sweden! England! Belgium (V. H.), France! Germany! 



Var. producta Grun. (1880). — V. L. 0,o2 to 0,025. Ends rostrate to capitate. — Gomph. 

 commune Lagst. Spitsb. D. p. 40 PL I f. 14. G. ang. var. prod. V. H. Syn. PI. XXIV f. 52 to 55. 



Fresh water: Spitzbergen! Sweden! Finland! Neuchatel! Tasmania! Arctic America! Winni- 

 peg River! Brazil! 



Var. obtusata Kutz (1844). — V. distinctly clavate, with broad, subrostrate ends. L. 0,025 

 to 0,03 mm. Striee 9 to 10 in 0,oi mm. — Sphenella ohtusata KiJTZ Bac. p. 83 PI. IX f. 1. 

 Gomph. ang. var. obtus. V. H. Syn. PI. XXIV f. 43 to 45. Sph. obt. and S. vulgaris Schum. I 

 Nacht. PL II f. 14, 15. Sphenella naviculoides Hantzsch in Rab. Dec. N:o 1322 (1862). 



Fresh water: Thuringen! 



Var. cequalis Greg. (1856). — V. with capitate-rostrate apex and basis. L. 0,o3 to 0,035; 

 B. 0,006 mm. Strise 10 to 12 in 0,oi mm. — G. cequale Greg. M. J. IV PL I f. 41. G. angust. 

 var.? cequalis Grun. V. H. S. PL XXV f. 3. 



Fresh water: Scotland (Greg.). 



Var. subcequalis Grun. (1880). — V. as in var. producta. Striae 14 in 0,oi mm. — Grun. 

 V. H. Syn. PL XXV f. 1. 



Fresh water. 



Var. Sarcophagus Greg. (1856). — V. linear with rostrate, broad apex and basis. L. 0,o24 

 to 0,04; B. 0,006 to 0,007 mm. Striaj 8 in 0,oi mm. — G. Sarcophagus Greg. M. J. IV PL I f. 42. 

 G. ang. var. Sarcoph. V. H. Syn. PL XXV f. 2. G. Lagenula Schum. Ill Nacht. PL II f. 8? 



Fresh water: Sweden (Rimforsa in "WestergStland, Alnarp)! Scotland (Greg.). 



Var. undulata Grun. Ms. — V. triundulate. L. 0,02 to 0,o28; B. 0,oo6 mm. Strise 10 inO,oi mm. 



Fresh water: Laurgaard in Norway (Grun.). 



Gomph. angustatum is a very variable species, passing over by its varieties to Gomph par- 

 vulum var. micropus. By the var. undulata it seems to be connected with Cymhella dbnormis. 



4. G. intricatum KtJTZ (1844). — V. sublinear, slender, slightly gibbous in the middle, 

 with obtuse apex and basis. L. 0,o3 to 0,o7; B. 0,oo5 to 0,oo8 mm. Axial area distinct, but 

 narrow; central area transverse, broad. Strise 10 in 0,oi mm., subparallel, obscurely punctate. — 

 KtJTZ Bac. p. 87 PL IX f. 4. V. H. Syn. p. 126 PL XXIV f. 28, 29. G. gracile Schum. II Nacht. 

 PL I f. 18 a. 



Fresh water: Sweden! Russian Lapland! Finland! Hungary, Dubravica, fossil (Grun.), 

 Ecuador (reg. trop.)! 



Var. pumila Grun. (1880). — L. 0,03; B. 0,oo5 mm. Strise 10 in 0,oi mm. — Grun. in 

 V. H. Syn. PL XXIV f. 35, 36. G. gracillimum Schum. II Nacht. PL I f. 18 6? 



Fresh water: Belgium (V. H.), England, Cirencester! Hungary, Dubravica, foss. (Grun.). 



