KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND. 25. N:0 5. 23 



Himalayas et Malabar, ex Utricularia stellari, comra. G. v. L. The apices are 

 a little more acute than in the figures of De Notaris. 

 24. Cl. Khasianum, n. sp. C. raedio recte, aequaliter tumidum, apicibus elongatis, spini- 

 formibus, curvatis, incurvatis, hyalinis, finibus non dilatatis; membrana glabra. Long. 

 = circ. llVa !&*• max. Cl. Kutzingio propius, sed brevius, crassius et loeve. Long. 

 265—292; lat. central. 23—26 /u. 



Khasia, ex. Utricularia sp., comin. G. v. L. 



The genus Closteriura forms 4 natural sub-genera: 



A. Selenoceras (Ä^éA^vrj, luna; **?«£, cornu). 



Strongly incurved, lunate. 

 Typ. sp. C. Dianae, moniliferum, Lagoense, Leibleinii. 



B. Campyloceras (xcc[mväqs, curvatus; etc.). 



Slightly curved, lower margin nearly straight. 

 Typ. sp. G- acerosum, lunula, striolatum. 



C. Orthoceras {oq&os, rectus; etc). 



Frond narrow, more or less bacilliform. 

 Typ. sp. C. biclavatum, bacillum. 



D. Stanroceras (aravpog, crux; etc). Kutz. Phyc Germ. p. 133, 1845. 



Frond lanceolate, slightly curved, acute. Zygospore cell normally stauriform. 

 Typ. sp. C. acutum, Ralfsii, rostratum, Kutzingii. 



Gen. 6. Spirotaenia, Bréb. 



Brébissox, in litt. 1846; in Ralfs' Br. Desra. p. 178, 1848). 

 1. Sp. truncata, Archer (Proc. Nat. Hist. Soc Dubl., t. II, f. 28 — 31) forma rotundata. 

 Forma? typicie consimilis, sed paullo minor et apicibus fere rotundatis. Spira? (cytio- 

 plasma fere totum evanuit). 



Long. 40—48, lat. 7—8 ju. Tab. I, f. 11. 

 Near Nilghiri Hills? 

 Two specimens only seen. 



As the external form, in this genus is almost nearly the same, with the exception, 

 of course, of minor details, (slight curvature; ends rounded, or more or less acute, etc,) 

 the division by Archer in Prit. Inf. pp. 751 — 2, 1861, must still be accepted. The sub- 

 genera are tnerefore: 



A. Monotaenia (/iovög, simplex; raivicc, fascia). 



»Endochrome a single spiral band», Archer 1. c. 

 Typ. sp. S. condensata, S. tenerrima. 



B. Polytaenia (noAvg, multus; etc). 



»Endochrome in several spiral bands», Arch. 1. c 

 Typ. sp. S. obscura, rectispira, grandis? 



[Is not S. grandis, Delp., t. XX, f. 23 in Desm. Sub-alp., a large specimen of 

 S. obscura Ralfs just about to divide?]. 



