REVIEWS AND BOOK NOTICES. B15 
EREN tapering dark-green leaves, with very short, often eyen square ee — 
without stomata or bast-bundles;. circular sporocarp witha very narrow velum; ma 
crospores 0°36-0°50 mm. wide, marked with smaller bad more regular, sate eem deag 
rather sharp points; microspores (0024-0027 mm. long) brown, very minutely papillose 
ær almost smooth: : , dee — d in 
t th. arge , covering gravel, deeply i 
G running water, on the Mono-trail, eastern declivity of the Sierra Nevada, 7000 feet alt., 
. H. Bolander, 1866. Closely allied to the last species, distinguished by its s stout, shor 
leaves niente stomata, and the markings of the larger macrospores, etc.; in many 
ct r T. lacustris: 
= ghar A. Braun in litt.— Terrestrial, trunk scarcely lobed; [eaves 
(20-60), a 7 in. long) 3-angled, nea se erect, light-green,.with numerous stomata 
and 3 Boal eei häst bundles; sporocarp mostly oblong, entirely covered by the ve- 
ma s (035-0 í 
a rown. 
flats or springy declivities in Oregon; on the apinan ig all, 1833; Camass 
Prairies of thé Cœur Te Chs. Geyer, 1843; Will sy anes: E. Hall, No, 693, 
1871. Thin but ewe ves, as most land Isotte® have, a three strong bast-bundles 
corresponding the 3 angles. Trunk rhombic in transverse section, eje super- 
ficially divided eva shallow groove into two lobes. Closely allied to Z. melano, 
of the Mississippi Valley, which Mr. Hall lately discovered also in aig at, resem- 
bling in the velum the two Florida species I. —— and I. Chapma 
ISOETES ECHINOSPORA Dur., var. BRAUNI! Engelm.—In the "Uintah emai at 
9500 feet alt., S. Watson. The westernmost and the highest known locality of this 
SQ PE ENGELMANN. 
ÆCIDIUM PsSORALEX.—Spots none; ein abundant, generally occupying all the 
lower canals of the leaf, rarely a few on the upper surface, short margin crenulate; 
~ spores sub-globose and sub-elliptical, brownish yellow when fresh, yellowish when 
dry, -0007--0008 inch long.—Parasitic on leaves of Psoralea floribunda, Colorado Ter- 
: seep ae H. Peck. 
DIUM P. Yi. — Spo none; peridia ‘en occupying all the lower surface 
of the ee er i bright-colored, te subentire; gpores. PEES — 
chrome yellow. I Smelowsiia calyci 
Meyer. aae aap Territory.—C. H, PECK. 
Bes REVIEWS AND BOOK NOTICES. 
= Revision or THE Ecurni.*— The third part of this elaborate 
work, the first-and second parts of which we noticed in the pre- 
ceding volume of this journal, has appeared — in the same 
beautiful style as the preceding portion. 
The present part contains ahs descriptions of the species of 
‘recent Echini (sea urchins),.with a full discussion of the ordinal 
and subordinal characters. The plates are beautifully executed 
with many details both of the external parts and the internal 
anatomy. 
: *Iitustrated Catalogue f th 
No. vii. Revision ripeka Ar Alexander Agassiz. Part iii with 45 ibea and 
plates i g Part iv. - Cambridge, 1873. ~ 628. 
Royal yoz Dp. ms 
* 
