TEXT-BOOKS, GENERAL WORKS, < ESSAYS. 
Gen. Sub. 5 
°Driesch, H. S. Die mathematisch-mechanische Betrachtung morpho- 
logischer Probleme der Biologie. Eine kritiscbe Studie. Jena : 
8vo, iv & 59 pp. 
Frenzel, J. Ueber der primitiven Ortsbewegungen der Organismen. 
Biol. Centralbl. xi, pp. 464-474. 
Assumption of a general attractive force to explain the movements of 
small organisms. 
. Die Verdauung lebenden Gewebes und die Darmparasiten. Arch. 
Anat. Phys. (Phys. Abth.) 1891, pp. 293-814. 
Friedlander, B. Zur Beurteilung und Erforschung der tierischen 
Bewegungen. Biol. Centralbl. xi, pp. 417-429. 
Protest against unscientific use of terms such as “ will ” and 
“instinct,” and against premature “explanations” of the movements 
of animals. 
Joly, J. The Abundance of Life. Sci. P. R. Dublin Soc. vii, 
pp. 55-90. 
Among other conclusions of a very suggestive paper, this contrast is 
noteworthy : — 
“ The transfer of energy into any inanimate material system is 
attended by effects retardative to the transfer and conducive to dissi- 
pation,” while “ the transfer of energy into any animate material 
system is attended by effects conducive to the transfer, and retardative 
of dissipation.” 
“The organism is a conBguration of matter which absorbs energy 
acceleratively, without limit, when unconstrained.” 
Julien, A. ‘ Loi de la position des centres nerveux. C.R. cxii, pp. 
741-743. 
There is a constant relation between the position of the principal 
nerve-centres and that of the chief sensory and locomotor organs. 
Lacaze-Dutiiiers, H. de. Quelques observations sur le langage des 
b6tes. Rev. Sci. xlvii, pp. 577-584. 
Lameere, A. Prol£gom&nes de Zoologie. Bull. Sci. Fr. Belg. xxiii, 
pp. 399-411. 
1. Qu’est-ce qu’un animal ? 
2. Origine du r&gne animal. 
3. Polystomes et Monostomes. 
4. Accelomates et Coelomates. 
5. Asterozoaires ou Hydrocoeliens. 
6. Helminthozoaires ou Aplocceliens. 
7. Chordozoaires ou Myocoeliens. 
°Leuckart, R. Ueber Stand und Aufgabe der heutigen Zoologie. 
Begrussungsrede. Verh. deutsch. Zool. Ges. 1891, pp. 3-10. 
