QUARTERLY CHRONICLE OF MICROSCOPICAL 
SCIENCE. 
Kolliker und Siebold’s Zeitschrift—The number of this 
journal issued for the passed quarter contains but two papers ; 
both are on microscopical subjects, and both are eminently 
worthy of the attention of English observers. The first is by 
Professor Claus, of Marburg, “ On the Organization of the 
Cypridinide,’ and contains a valuable résumé of our know- 
ledge of these crustaceans, as well as some novel observations 
and suggestive remarks from the author. A well-executed 
plate illustrates this paper. The second paper, which occupies 
the bulk of the journal, is one of those elaborate, careful, and 
valuable contributions to science, which characterise the 
scientific periodicals of Germany. It is entitled ‘ On the 
Eye of some Cephalopoda,” and is written by Professor Hensen, 
of Kiel. The paper is illustrated by nine plates, the execution 
of which is such as quite to put to shame the careless and 
sketchy performances exhibited as illustrations in many of 
our own scientific periodicals. The minute anatomy of the 
eye and its adjuncts, and the histology of each of their com- 
ponent parts, are fully and elaborately described. Professor 
Hensen’s researches on the retina in Sepia appear to be 
particularly valuable. The subject matter of the paper is 
arranged under the following heads :—Ist, the eye-capsules ; 
2nd, the membranes of the eyeball; 3rd, the lens; 4th, the 
retina, its investing membrane, nervous layer, network, cell- 
layer, pigment-layer, layer of rods, and homogeneous mem- 
brane ; 5th, the connection of the retinal elements ; 6th, the 
optic ganglion. The observations of Professor Hensen refer 
principally to Sepia, but the eyes of other genera—Nautilus, 
Loligo, &c.—are noticed, and also those of some Heteropoda 
and Lamellibranchiata. 
Max Schultze’s Archiv fur Mikroskopische Anatomie.—This 
journal has just made its appearance, and, if an opinion 
