BY G. I. PLAYFAIR. 



S49 



bservata Cellulse quad- --.^^ ^-^ 



cylindrace?e, disjunctse, ( j ( \ ( \ 

 ate bomogeneo vel min- r ^ v^ V^ 



MYXOPHYCE^. 



Genus A n a b .e n a Bory. 



Anab^na osciLLAiiJoiJiEs Bory. (PL xlvi., f.l.) 



Cf. Biol. Richm. R., p. 127, for dimensions. Three shapes of 

 gonidia were noted in this one sample, viz.: (1) oblong, with 

 arched sides, and broadly rounded ends; (2) broadly cylindrical, 

 with Hat sides, and broadly rounded subtruncate ends; (3) long 

 narrow cylinders, with straight sides, and truncate ends. 



Lismore (185). 



Genus C y l i n d r o s p e r m u m Kiitz. 



CVLINDROSPERMUM RECTANGULARK, n.Sp. 



Stratum obscure-viride. Trichomata pallidissime aeruginosa, 

 ad genicula constricta, apicibus conicis. Vagina tenuissima, 

 distincte observata Cellular quad 

 ratse vel 

 protoplasmate 



ute granulato. Heterocystides ro- 

 tundato-conicae vel oblongse sub- 



cylindraceae; apicibus rotundatis. . ^ 



Gonidia stricte cylindracea, lateri- fj 

 bus planis, apicibus truncatis; vel | ] 

 doliformia, lateribus levissime arcu- — 

 atis, apicibus truncatis; vel rarius 

 elliptico-lanceolata, apicibus rotund- 

 atis; protoplasmate granulato, dilu- 

 tissime seruginoso psene hyalino. 



Trich. diam. 4-5; cell. alt. 6-10, 

 ssepe 8 fx. Heterocyst. conic, long. 

 6-10, lat. 5-6, cylindr. long. 11-12,^ 

 lat. 6/x. Gonid. cylindr. long. 12-15, 

 lat. 5-6, dolif orm. long. 1 6-20, lat. 7-8, 

 lanceol. 22 x 10/x. 



Lismore (256). 



Found on dripping rocks halfwav 



D 

 n 



D 



n 



Fig. A. 



Cyliiidrospermum rcclanynlare, 



ii.sp.;(x 1000). 



up the New Cut. The 

 specimen showed very well the development of the heterocysts 



