Notices of Memoirs—Royal Microscopical Society. 563 
The bibliography, or list of titles, is also classified as follows: 
ZooLoay. 
A. Generat (including Embryology and Histology of the 
Vertebrata). 
B. Invertesrata. --- Mollusca. Molluscoida. Arthropoda: 
(a) Insecta. (8) Myriapoda. (y) Arachnida. (§) Crustacea. 
Vermes. Echinodermata. Coelenterata. Porifera. Protozoa. 
Borany. 
A. Generat (including Embryology and Histology of the 
Phanerogamia). 
B. Cryprocamra. — Cryptogamia Vascularia. §Muscinex. 
Characeze. Fungi. Lichenes. Alge. 
Microscopy, ete.—Methods. Instrumental, etc. 
The only exception to the completeness of the Bibliography 
(within the prescribed limits of the Invertebrata, Cryptogamia, etc.) 
is in regard to (1) the Insecta, only such articles being noted as are 
of general interest, lists and descriptions of new species, local fauna, 
etc., being omitted; and (2) Paleontology, which is dealt with so 
far only as bearing on living forms or structural features ; and, for 
the present, only a few of the principal Geological Journals, etc., are 
included. 
Even within these limits many points of interest are brought 
within the notice of the English student and geologist, either 
of actual importance or suggestive of further inquiry. The biolo- 
gical notices are frequently of direct interest to the student of fossils, 
and of the life of a species. 
In illustration of the geological contents of the biological record 
in this valuable bi-monthly Journal of the Royal Microscopical 
Society, we quote the following :— 
“ Aspidura.'—Dr. Hans Pohlig gives a fresh definition of this 
interesting Triassic Ophiurid, from the Muschelkalk of Germany, 
which he divides into two subgenera, Amphiglypha and Hemiglypha, 
of which the former is broader and has shorter arm-spines than the 
latter ; in each case a single species is alone known. He regards 
this form, which is the only Ophiurid as yet found in this stratum, 
as representing an extinct genus, which is distinguished from all its 
allies by the possession of larger, closely connected, radial shields, 
and by the bilateral groove on its oral shields; belonging to the 
Ophiolepide, it is intermediate in character between Ophioglypha 
and Ophiopus. Hemiglypha has many points of resemblance to the 
Asterida, and appears to occupy a similar position among the 
Ophiurida to that held by Brisinga among the Asterida. 
“It may be interesting to observe that Pohlig agrees with Haeckel 
in regarding the Asterida as the older forms.” 
1 Zeitschr. wiss. Zool. yol. xxxi, (1878) p, 235. 
