1898 CURRENT LITERATURE 2g! 
naria § Eremogonez will prove difficult, if not impossible, in practice. It will 
be noted that in the number and limitation of our North American species, 
Mr. Williams suggests scarcely any change. Of A. Benthamii he proposes 
a var. diffusa, based upon Mr. Heller’s no. 1686 from Kerr county, Texas. 
Concerning A. serpyllifolia he says, “introduced into North America, but 
scarcely naturalized there;” but certainly no introduced caryophyllaceous 
plant except the cerastiums has taken more kindly to American soil, for it is 
frequent from Maine to the Pacific coast and may often be found in places 
quite remote from dwellings. In the subdivision of this species, var. Zenuior 
Koch does not appear even in the synonymy. On page 412, A. ursina is 
again separated from A. cafi//aris, on the ground that “none of the many 
forms of A. cafil/aris have glaucous leaves and emarginate petals.” But 
the emarginate character of the petals is not a strong one and on a succeed- 
ing page Mr. Williams himself says, ‘As Ledebour points out, typical A. 
capillaris, which is widely distributed in Siberia, is a glabrous plant with 
short barren shoots and rigid glaucous leaves.” 
rom Mexico Mr. Williams recognizes nine species and six varieties, his 
A. megalantha (A. lanuginosa var. megalantha Rohrb., A, alsinoides vat. 
ovalifolia J. D, Smith) being new in conception. 
In a prefatory note it is stated that in the spelling of geographic names 
the “Times” atlasshas been followed. We are unacquainted with this work 
but should not place implicit confidence in it if “ Chinautla” and “ Sempaal- 
tepec”’ are samples of its orthography. 
Once more it must be said that Mr, Williams could add greatly to the 
value of his papers through citing by numbers a few authentic specimens 
under each species and variety. However, the treatment of Arenaria shows 
on the whole even more to praise and less to criticise than that of Silene. 
—B. L. Rosinson. 
A RECENT work of Cavara™ deals largely with the finer structure of the 
nucleolus. Ornithogalum umbellatum, Cucurbita maxima, Crinum =— 
teum, Narcissus poeticus, Lilium Martagon, and others, furnished material. 
Absolute alcohol, alcoholic corrosive sublimate, Carnoy’s fluid and Merkel’s 
fluid were the principal fixing agents. Zimmerman's iodine-green and 
fuchsin was recommended for staining on account of its rapid and effective 
work, but many other stains were used including the methyl-green-eosin- 
orange of Erlich, and Flemming’s safranin-gentian-violet-orange- Pgh es 
was used for embedding. 
He believes that nucleoli are not thrust out but are taken up by the nuclear 
jagrammatic, represents 
thread. A series of figures, apparently somewhat d ; 
does not receive equal 
the nucleoli in great detail, but the nuclear ‘thread 
‘ . . ico 
* Cavara, F,— Intorno ad alcune strutture nucleari, Atti dell’ Istituto botant 
della R. Universita di Pavia II. 5: 1-49. pl. 2. 189 
