KONGL. SV. VET. AKADEMIENS HANDLIXGAi;. BA>;d 26. X:(J 2. 117 



13. G. inacrum W. 8m. (1853). — V. nariow, lanceolate, abruptly attenuated into very 

 long and iiarrow beaks, curved in contrary directions. L. 0,2 to 0,2?; B. 0,oi mm. Median line 

 central. Transv. stria? 27 to 28 in 0,oi mm., longitudinal more tlian 30 in 0,oi mm. — Pleur. 

 macr. W. Sm. B. D. I p. (17 Pl. XXXI f. 276. V. H. Syn. p. 119 Pl. XXI f. 9. Per. VIII f. 41. 



Marine: Sea of Kära (Grnn.), North Sea! Mediterranean Sea (Grun.). 



14. G. prolongatum W. Sm. (1852). — V. narrow, lanceolate, gradvially attenuated into 

 long beaks, curved in contrary directions. L. 0,ii to 0,25; B. 0,00.5 to 0, 01 5 mm. Transver.se 

 striiB 21 to 22 in 0,oi mm., longit. finer. — Pleur. prol. W. Sm. Ann. Mag. Nat. Hist. [2] IX 

 p. 9 Pl. II f. 7. B. D. I p. 67 Pl. XXII f. 212. Per. VIII f. 39. 



Marine: North Sea! Balearic Islands! 



Var. closteroides Grun. (1884). — Beaks turned in the same directions. Transv. strise 22 in 

 0,01 mm. — Pleur. prol. var. closteroides Grun. Franz Josephs Land D. p. 105 (53) Pl. I f. 58. 

 Per. VIII f. 40. 



Marine: Coasts of England (Grun.). 



15. G. temussimuin W. Sm. (1853). — V. very narrow, linear-lanceolate, slightly sigmoid, 

 acute. L. 0,ii to 0,22; B. 0,oo5 to 0, 015 mm. Median line central. Transv. strite 18 to 22 in 0, 01 

 mm. longitud. finer. — Pleur. tenuiss. W. Sm. B. D. I p. 67 Pl. XXII f. 213. Per. VIII f. 13. 



Marine: Sea of Kära! East coasts of England (W. Sm.), Triest! California! 



Var. suhtilissima Grun. (1880). — L. 0,137; B. 0, 006,5 mm. Transv. str'iee 27 in 0, 01 mm. — 

 Pleur. ten. var. suht. Grun. A. D. p. 58. 



Marine: Sea of Kära (Grun.). 



Var. hyperhorea Grun. (1880). — V. linear, sigmoid. L. 0,084 to 0,094; B. 0,oo6 to 0,oo7 

 mm. T.S. : L.S. -'/.,3, -U^ in 0,oi mm. — Pleur. ten. var. hyperh. Grun. A. D. p. 58 Pl. IV f. 77. 

 Per. VIII f. 14. 



Marine: Sea of Kära (Grun.). 



Gi/ros. tenuissimum connects G. proluiiyaium with G. Spencerii by the Var. hyperhurea. 



16. G. Spencerii W. Sm. (1852). — V. linear-lanceolate, sigmoid, obtuse. L. O.ots to 0,22; 

 B. 0,012 to 0,025 mm. Median line central. Transv. striaä more distant than the longitudinal. 

 T,S. : L.S. 1V22. -'/oi, '-/.,4 in 0,oi mm. — Pleur. Spencerii W. Sm. Ann. Mag. Nat. Hist. [2] IX 

 p. 12 Pl. II 'f. 15' B. 'd. i p. 68 Pl. XXII f. 218. P. Spene. var. Smithii Grun. A. D. p. 59, 

 V. H. Syn. p. 118 Pl. XXI f, 15. Per. VIII f. 21, 23. P. Spene. var. Arnottii Grux. A. D. p. 59, 

 P. Spene. var. horealis Grun. A. D. p. 60. Per. VIII f. 15. P. Spene. var. Antillanim Grun. A. D. 

 p. 60. P. Spene. var. curvula Grun. A. D. p. 60. V. H. Syn, p, 118 Pl, XXI f 3, 4, 5. Per, 

 VIII f, 20, 24. 



Brackish water: Spitsbergen! Sea of Kära! North Sea! Saxony! Canada! New York! West 

 Indies! Bombay (Grove Coll,)! 



Var, exilis Grun, (1880). — L. 0,o5 to 0,055; B. 0, 00 7 mm. Transv. strifB 28 to 29 in 0,oi 

 mm, — P. Spene. var. exilis Grun. A. D. p. 60. Per. VIII f. 25. 



Brackish water: Normandy (Grun.), Tasmania! 



Var. minutula Grun. (1880). — L. 0,o6; B. 0,oi mm. T.S. : L.S. --Va,,, ■V26 "^ ^'"i mm. — 

 P. Spene. var. min. Grun. A. D. p. 60. 



Brackish water: Elbe (Grun,). 



Var. nodifera Grun, (1880). — V. linear, slightly sigmoid, obtuse. L. 0,o6 to 0,i; B. O,oii 

 mm. Median line central. Central nodule surrounded by an elongated, oblique area. Transv. 

 striiE slightly radiate in the middle. T.S, : L.S. 'V22' '"/as i^i 0, 01 mm. ~- P. nodif. Grun. A. D. 

 p. 59. P. Spene. var. nod. V. H. Syn. p. 118. Pl. XXI f" 13. Per. VIII f. 26. 



Fresh water: Mouth of Elbe (Grun.), Belgium (V. H.), Samoa (Grun.). 



