444 SUPPLEMENTARY TsOTES O^ THE GENUS NAJAS. 



Species duhice vel excludendce. 

 Najas effugita, Heer, Flor. tert. Helvet. i. 103, t. 46. figs. 3a & 3& (1854-55); 



Schimper and Schenk, Handb. Palseont. Abtli. ii. 381 (1890). 

 *' N. fruetibiis minoribus lanceolatis, stylo brevissimo, stigmatibus duobus elongatis. 

 ** Oeningen, Insektenscbicht des untern Bruches." 



Not seen. 



The figures represent a fruit which is 9 mm. long to the tips of the stigmas, 4*5 mm. 

 to their point of separation, and 3 mm. broad. It may belong to N. marina, Linn. 

 Heer suggests a similarity to N. mino7% All., but it is larger than any fruit of this 

 species Tvliich I have seen. 



Najas striata, Heer in K. Svensk. Vetensk.-Akad. Handl. viii. no. 7, 52, t. 8. figs. 5, 6- 



(1870) ; Schimper and Schenk, Handb. Palgeont. Abth. ii. 381 (1890). 

 "3. fructibus ovato-lanceolatis, longitudinaliter striatis, stylo longiusculo. " 



Kingsbai, Spitzbergen. 



Not seen. 



The specimens consist of narrow, linear, striated pieces of stem and an ovate-lanceolate 

 fruit, which is 7 mm. long by 2"5 mm. broad .... with well-marked longitudinal striations 

 and a cross-line at the insertion of the solitary style. Only one stigma is present. The 

 author says : " It is very similar to Najas stylosa, Heer, but distinguished by the longi- 

 tudinally striated fruit. The fruit closely resembles in form that of N. flexilis, which 

 also has a long style, but it is much larger and not smooth." 



I do not think that any of the specimens belong to the genus. 



Najas stylosa, Heer, Plor. tert. Helvet. i. 103, t. 46. figs. 1 & 2 (1854-55) ; Schimper 



and Schenk, Handb. Palaeont. Abth. ii, 381 (1890). 

 " N. fructibus ovato-lanceolatis, stylo longiusculo, stigmatibus duobus elongatis. 

 *' Oeningen, Insektenscbicht des untern Bruches." 



Not seen. 



Fig. 1 represents a stem bearing leaves, and probably does not belong to the genus. 

 Fig. 2 represents an axillary fruit with a pair of stigmas, and measures nearly 1 cnu 

 in length to the tops of the stigmas and 8 mm. to their point of separation. If it is 

 a species of Najas, the large size of the fruit precludes all except N, marina, Linn. 



The determination of these species, which assume the existence of Najas in Tertiary 

 times, seems extremely doubtful. 



