1918] CURRENT LITERATURE 565 
Staten Island, but the flora calls for a book of nearly 600 pages. About 80 
per cent of the land plants occur also in the West Indies or southern Florida 
or both, while about 8.7 per cent of the total native flora is endemic, “there 
being 61 species in Bermuda or its waters not known to grow naturally any- 
where else in the world.” The representation of groups by the native species 
is as follows: Spermatophytes 146, Pteridophytes 19, Bryophytes 51, Lichens 
80, Fungi 175 (at least), Algae 238, making a total of 709 species. The volume 
contains descriptions and illustrations of 519 species of Spermatophytes, 
Pteridophytes, and Bryophytes, and also accounts, not illustrated, of the 
Lichens, Fungi, and Algae. 
The excellent text cuts, simple keys, and clear descriptions should make 
the volume a very effective introduction to an interesting flora.—J. M. C. 
NOTES FOR STUDENTS 
Prothallia and sporelings of lycopods.—Recent investigations have added 
greatly to our knowledge of some difficult prothallia and sporelings of lycopods 
and, with researches now well advanced, may make these phases of the life 
history as clear as in the common ferns. The Lycopodiales and Psilotales will 
be considered separately. 
LycopopraLes.—Among the investigators who have studied the prothallia 
of Lycopodium, two have been preeminent both in field and laboratory work, 
namely, TREUB, who devoted his attention to the tropical species of Java, and 
BRUCHMANN, who studied species of the northern temperate zone. A third 
investigator of the first rank must now be added, the Rev. J. E. Hottoway, 
who has discovered and studied the prothallia and sporelings of various New 
Zealand species of Lycopodium, so that species of the southern temperate zone 
are now represented. Three papers: have already appeared and the investi- 
gation is still in progress. 
The introductory paper deals with L. volubile, L. scariosum, L. densum, L. 
laterale, L. cernuum, and L. Billardieri, all of which, except L. cernuum, are 
confined to the islands and countries of the south Pacific. He found prothallia 
of all except L. densum, so that 4 species are recorded for the first time, ZL. 
cernuum having been described by TrEuB. Only a brief mention is made of 
the prothallia, the paper dealing, as its title indicates, with the comparative 
anatomy. The structure of the stele in young and adult plants is compared, 
and it is clearly shown that the radial type is primitive and that the bgadied 
type is derived from it. 
3 Hottoway, J. E., A comparative study of the anatomy of six New Zealand - 
species of Lycopodium. Trans. New Zealand Inst. 42:356-370. pls. 31-34. 1900. 
, Studies in the New Zealand species of the genus Lycopodium. Part I. 
Trans. New Zealand Inst. 48: 253-303. pis. 17, 18. figs. 102. 1916. 
——, Studies i New d species of the genus Lycopodium. Part II. 
Mito a “ Pasion MELE Trans. New Zealand Inst. 49:80-93. pis. 8, 9. 
Sigs. 24. 
