368 
NOTES AND MEMORANDA. 
armiilo vel lociilo centifili iustructa. Iiidi vidua vivunt in aqua 
marina. 
C. tenuis, n. s. — Frustula a latere oblongo-rectangula, medio tumi- 
dula ; valvis lineari-inflaiis, polis rotundatis ; una valvarum loeulo 
centrali rotundo instrueta, in sectione subquadrato. Long, valvarum, 
44 /X 5-55 /X 2 ; lat. 4 /x 8-11 /x3. Habitat — Anconse ad scopulum Ste. 
dementis, Neaj)olim in aquario. 
{Atti della Accad. Pontif., 1878, 2”' sess. : extraeted from Brebis- 
soNiA, No. 2, 1878 — a new illustrated monthly serial devoted to 
Algology and Mierograpliic Botany, edited by M. G. Huberson.) 
The ‘ American Quarterly Microscopical Journal ’ * also contains 
figures and descriptions by Professor H. L. Smith of the following 
new diatoms (all n. sp. H. L. S.) : — 
Homoeocladia capitata. — Black Rock, Cal. 
3Ie7’idion intermedium. — Knoxville, Tenn. 
Navicula Kutzingiana. — Avranches, Normandy. 
Navicula parvula. — VJlerville (France). 
NitzscJiia Kittoni. — River Catuche, Caracas, Venezuela. 
Baphoneis australis. — Royal Sound, Kergueland’s Land. 
Bhizosolenia Eriensis. — Lake Erie, Lake Michigan. 
Cestodiscus Baileyi. — Lower Lake, Klamath. 
Amphora mucronata. — Atlantic Marshes, Cape May, N.J. 
Actinocyclus Niagaras. — Lake Erie. 
In regard to the last sj^ecies, the author says that its occurrence in 
fresh water is sufficiently remarkable, as all the members of the genus 
hitlierto known are marine, and he concludes that it is one of those 
diatoms living at considerable depths, and which are only brought up 
by dredging or storms. That diatoms flourish in immense abundance — 
notably, the Coscmodiscece — at great depths is indicated by many of the 
‘ Tuscarora ’ soundings ; some of these, from depths of over three miles, 
were almost wholly Coscinodiscus omphalanihus and its varieties, fully 
charged with endochrome ; and belts of “ diatom ooze ” at consider- 
able depths were also found by the ‘ Challenger ’ naturalists. 
Kidzing’s Diatomacece. — In regard to N. Kutzingiana, Professor 
Hamilton Smith says : — “ I give to it the name of the celebrated 
algologist, Kutzing, whose numerous figures of Diatomaceae, though 
but mere outlines sketched by aid of a microscope that would scarcely 
be looked at, much less through, at the present day, possess more of 
the character and catch more of the spirit of the living species than 
many of the representations of modern days, and whose descriptions 
are models of accuracy and conciseness. The more I study his 
plates, the more I admire their conscientious accuracy and faithful- 
ness.” 
Collecting Copepoda. — A few words as to the best modes of 
collecting Copepoda is given in Dr. G. S. Brady’s “ Monograph of 
the Free and Semi-parasitic Copepoda of the British Islands.” f 
* Vol. i. p. 12. t Printed for the Ray Society, 1878. 
