40 W. B. TTJRNER, FRE8H-WATER ALGA<\ OF KAST INDIA. 



majority of the species of Triploceras (i. e. those with stellate sections) along with D. 

 nodosum under Docidiopsis! 



Gen. 12. Dysphinctium, Näg., ex. p. 



(Einz. A 1 «■ . p. 109, 184'.); Calocylindrus et Dysphinctium; excl. Actinotaenium, ex. p., scnsu Naf.gkmo. sed formse 

 pro max. parte retentae; Pleurotaenium Näg.? ex. p.; Pleurotamiopsis Lind. ex. p.). 



1. I>. duhium, n. x]>.? 1). parvum, duplo longius quaru latum; semicellulae sub-globosa?, 

 apice rotundatse, medio leniter sub-acute constrictae; membrans hevis. Long. 26.5, lat. 13 u. 



T. I, f. 1, 2. 



2. I). inferum, n. sp.? D. parvum, duplo longius quam latins, sub-globosum; apice ro- 

 tundatum; medio modice constrictum. Membrana la>\ is. A vertice visum circulare. 



Long. 20, lat. 10 ,". 

 T. I, f. 21. 



3. I), exile, n. sp. D. niinutum, 1^.,-plo longius quam latum; semicellulse basi dilatata*, 

 supra recte attenuatse, apice rotundatae, medio paullo et leniter Gonstrictae. A vertice 

 rotundatum. Membrana laevis. 



Long. 20, lat. 13 u (also in Wallich Mscr. No. 98). 



T. I, f. 21*. 



Searsole, Oct. 20, 1855. Coinmon, G. C. W. 



4. D. viride (Corda) De Toni (Sylloge Chlor. p. 885, No. K!; Dysjph. Cordanum (Bréb.) 

 Häng. Prodr. p. 186; Cosmarium colpopelta Bréb. apud Archer in Prit. Inf. p. 734; 

 Cosmarium Cordanum Bréb. in Rabh. Fl. Eur. Alg. III. ]). 177; Tirneh, Journ. Roy. 

 Micr. Soc. p. 934, t. XV, f. 4 (fig. vitiata, in separ. eraend.!); Colpopelta viridis, Corda, 

 Anim. Microsc., in Almanach de Carlsbad, p. 206, t. II, f. 28, 1835). 



Long. 39—45, lat, 25—28 //. 

 Northern India, 



5. I), subturgidum, n. sp. D. magnum, circ. duplo longius quam latum; turgidum; ovale, 

 membrana crassa, regulariter punctata, apicibus sub-rotundatis, medio incisura leniter 

 incavato. 



Long. 140—150, lat, 66—74, lat, constr. 60—64 /a. 



T. VII, f. 4. 



Near to C. turgidum Bréb. (Pleurot. turgidum, DBy.; Galoc. turgidws, Kirchn. 

 Alg. Schles. p. 142), but differs in both size and outline; being only 2 ., so large and 

 less tumid at the base of the semicells. 

 <>. I), yrande, Delp. (Desm. Sub-alp. p. 231, t, XXI, f. 9, 1877) var. cuncatiim. n. v. 

 1), maximum, latissimum, circ. duplo longius quam latins; seniieellulis ovato-cunei- 

 formibus, e basi attenuatis; membrana crassa, irregulariter punctata: apicibus late 

 rotundatis; sinn leniter incurvato. 



Long. 195—220; lat, 95—100, lat. constr. 85—92 u. 



T. VII, f. 5. 



Near Nilghiri Hills? 



This variety is distinguished Ironi the type by its sides being åttenuate towards 

 the apices, which are truncato-rotundate, not siraply rounded. 



