14 Moll. 
MOLLUSCA. 
much more copious, aud illustrated with many woodcuts. The 23 plates 
of the Atlas are the same as in Woodward. 
G. W. Tryon’s “Structural and Systematic Conchology,” vol. i., is a 
valuable text-book for general knowledge of the Mollusca , containing 
accounts of their external and anatomical organization, the structure of 
the shell, habits, economy, geographical and palaeontological distribution, 
and practical hints for collecting shells and arranging collections. 
Anatomy and Physiology. 
1 . General Morphology . 
G. Cattaneo (supra.) opposes the theory of Perrier and Gegenbaur, 
that the original type of the Mollusca is composed of metameres or 
repetitions of the homologous parts in a linear iferies, as in the Articu- 
lates and Vertebrates, stating that uVsei’i 0118 ,|yid.§£ce for that presump- 
tion exists among existing or palaeontological^ forms. The first plate 
contains schematic figures of the nervous system of several genera of 
Mollusca , compared with that of the Arthropoda , and figures of the 
development of the same. Abstract in Zool. Anz. 1882, pp. 682-684. 
J. Brock has found that the homogeneous as well as the fibrillary 
connective tissue (BindegeKvebe)' in Aplysia and some other Mollusca , 
exhibits traces of large cells, and may therefore be formed originally by 
cells in the same manner as in the Vertebrates. Zool. Anz. 1882, 
j>p..e?sh*8i.'s»_ ’ * ’ 
r *■ ■ r " \ 
2 . MiiscularyHystem and Movement. 
J. Woop-MASQj ^pr oposes tlie tjbrm “ Peripodium ” for the part of the 
foot of the te^regtyial Gastropoda, called by German writers “Fuss- 
saum” ; itis marW& off from the, side of the body, and very frequently 
.also by‘a horizontal groove, and is invariably 
richly ciliateJ throughout. P. A. S. B. 1882, pp. 60 & 61. 
ables of the creeping velocity of 21 species of European land and 
fresh-water Mollusca by H. Simrotii, in an official publication by the 
Realschule in Leipzig (title supra). , 
3 . Digestion. 
Further researches on the digestion in various cuttlefishes, snails, and 
bivalves, by C. Kruicenberg. Untersuch ungen des physiologischen 
Instituts in Heidelberg, iv. pp. 402-417. 
E. Bourquelet states, as the result of various experiments, that not 
only the secretion of the salivary glands and pancreas, but also of the 
liver, of the Cephalopoda acts on amylaceous substances, and changes 
them into sugar. Arch. Z. exp6r. x. pp. 384-421. 
Vigelius’s observations on the so-called pancreas of the Cephalopoda 
[see Zool. Rec. xviii. Moll. p. 12] are now published in a separate volume 
(title supra). 
0. F. W. Krukenberg gives some chemical notes on “ helicorubin,” 
