KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND. 25. N:0 5. 31 



20. D. sceptrum, Roy (Desra. of Mull, in Scot. Nat. p. 39, 1883; non Kutz.; D. tridentu- 

 lum, Wolle Desm. U. S. A. p. 52, t. X, 1. 10, 1884; Hedwigia p. 119, 1885). 



F. punctata, n. f. Magnitudo circa diinidium f. typicse. Membrana punctata; 

 punctis reticulatim vel in liueas obliquas ordinatis. 



Long. 130—160, lat. bas. 8—10, lat. apic. 7-8.5 ,«. 



T. III, f. 10. 



Near Nilghiri Hills? J. S. 



21. D. orientale, n. sp. Doc. elongatum, 16 — 19-plo longius quam latius, regulare, medio 

 paullulum attenuatum, basi inflatum; inarginibus lenissime siuuatis; membrana glabra 

 vel leviter punctata; sutura prosiliente; apicibus truncatis, paullo expansis, 36 — 44 

 tuberculis ovalibus parvis instructis. 



Long. 640—700, lat. bas. et apic. 39, lat. eentr. 32—34 //. 



T. IV, f. 1. 



The semicells are rarely straight, usually a little sigmoid in shape, or slightly curved. 



22. D. excelsum, n. sp. D. mediocre, 20 — 24-plo longius quam latum, fere rectum, regu- 

 lariter attenuatum; basi inflatum, supra partem basalem 3 — 4 tumoribus instructumj 

 membrana glabra?, sutura prosiliente. Apices truncatae, dentibus acutis circ. 6 preditse. 



Long. 420—480, lat. bas. 21, lat. apic. 15 ,u. 



T. IV, f. 2. 



Species near D. Ehrenbergii, but differing in the general outline, in the attenuate 

 seinicell, and in the acute, not conical, teeth at apex — also in the projecting suture. 

 P robably the same as D. Ehrenbergii rar. Floridense, Wolle (Desm. U. S. A. p. 159, 

 1884); however that is »without an evident suture or projecting rim», Wolle 1. c. 



23. D. Ehrenbergii, Ralfs (Br. Des. p. 157, t. XXVI, f. 4, 1848; Clos. trabecula Ehr. Abhl. 

 p. 68, ex. p., 1831; Infus. p. 93, \. VI, f. 11,8 (non 1, 3, 4, 5, 7!), 1838; Pleur. tra- 

 becula Näg. Einz. Alg. p. 104, 1849). [i tumidum, n. var. Fere ut in f. typica; sed 

 semicelluke in medio tuinidae, dentibus validibus conicis 6 ad apices munitte. Mem- 

 brana dense punctata. 



Long. 340 — 360, lat. bas. 24, lat. apic. 22, lat. centr. circ. 25 ,m. 



T. IV, f. 4. 



F. typica; this is noted (as Pleur. Trabecula) by Drs. Zellek and Rabeniiorst, 

 1S73, from Arracan; it appears also from E. India, ex Utricularia fasciculata, comm. 

 G. v. L. 



It seems clear from the figures in Eiikenbergs 'Infusionsthierchen' that he has 

 included several species under a common name, and, as no evidence appears to show 

 which was the type, it seems impossible to properly place them: hence Ehrb.'s nomen- 

 clature is apparently invalid. As the apical teeth are so marked, it is improbable that 

 the oft-cited form of Ehrb. (Meteorp. p. 12, t. I, f. 9) can be Ralfs' species, but it 

 must be allowed that the size given by Ehr„ circ. 225 .« long., cannot represent the 

 true D. trabecula, but rather the D. clavatum Kutz. Eiirenberg's measnres however 

 are very fallacious. Cfr No. 50 seq. 



24. D. niaciilatuin, n. sp. 1). permagnum, crassum, 12 — 14-plo longius quam latius, sub- 

 rectum, basi inflatum, unde paullulum attenuatum postea versus apices dilatatum; sutura 



