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POPULAR SCIENCE REVIEW. 
cephalic and a caudal lobe results from, the division into two laminae of a 
primordial cellular fold, which may he compared to the cellular column 
(Keimhiigel) of Hemiptera , Orthoptera, and Lepidoptera. The identity of 
formation of these organs, which have evidently the same morphologic 
value, and perfect analogy between the phenomena which subsequently 
take place in the cephalic lobe in the Crustacea on the one hand and the 
insects on the other, are in my opinion facts which enable us to determine 
with ease and certainty what are the homologous organs in these two 
groups of Arthopoda. 4. The caudal appendage of Mysis is folded under 
the abdomen as in all Decapods. 5. The caudal lobe commences to he 
formed before it is possible to recognise the least trace of antennary ap- 
pendages : these appear at the same time as the mandibles in the form of 
simple cellular papillae. 6. The Nauplian cuticle is formed at once over 
all the surface of the embryo : it is the first embryonic cuticle. Mysis does 
not undergo a blastodermic moult. 7. The tail, which is bifid in some 
species ( M . vulgaris and M. chameleo ), is simple, and terminates in a cul-de- 
sac in other species (M. ferrugined). 
The Anatomy of the Aaard Wolf (Troteles cristatus ). — Among the many 
excellent papers read during the quarter before the Zoological Society was 
one by Professor Flower on this subject. The result arrived at, after a 
careful examination of every part of this animal, was that Proteles consti- 
tuted of itself a distinct family of carnivorous animals, allied to the Hycenidce 
and Viverridce , but more closely to the former than Mr. Flower had previously 
supposed when he had only the skull of this remarkable animal to judge 
by. Mr. Flower’s paper was illustrated by the exhibition of the stuffed 
skin, a complete skeleton, and a full series of anatomical preparations of the 
internal organs of this animal, all taken from the same individual. 
Death of Herr Kner . — Herr Kner, of the University of Vienna, has died 
since our last. 
The Brighton Aquarium is likely to be soon un fait accompli. 
Improvements in the Dredge . — Captain Brabazon has taken out a patent 
for the improvement of the oyster dredge which deserves the notice of 
naturalists. The links of the new dredge are runners like those of a snow 
sledge. They are turned up at the ends, and connected by an iron ring or 
link, which rests on them and presents a smooth under surface, which carries 
it along the bottom of the sea, passing over the spat and brood of oysters, 
mussels, &c., without injury to them. 
The Variations of the Human Skull . — An important paper was read by 
Professor Cleland before the Royal Society at one of its meetings ere the 
close of the last session. The author’s conclusions alone (in abstract) would 
fill a couple of our pages. We must, therefore, content ourselves with com- 
mending the paper to the attention of anatomists. It is certainly one of the 
most interesting communications on this subject that has appeared for many 
years. The author will, we think, completely revolutionise craniology. He 
proposes a new method of classification based on the curvature of the base 
of the skull, which is highly interesting. 
A new Caiman . — A new reptile of this kind has been discovered by M. 
Preudhomme de Bone in a collection purchased by the National Museum 
of Belgium. 
