40 (Jen. Sub. 
I. GENERAL SUBJECTS. 
benthos, and the nekton ; (2) between the vertical and horizontal 
differences of temperature ; and (3) between eury thermal animals, 
which can tolerate great differences of temperature, and the stenothermal, 
which cannot; Maas (320, 321). 
Marine animals ; Walther (556). — Fauna of the deep sea ; Hickson 
(240). — The homes and migrations of animals ; Hicks (239). 
Pla?iaria gonocephala invading thfe region of PI. alpina and Polycelis 
cornuta ; Yoigt (549). 
Biology of the plankton ; FrancE (168). — Plankton statistics ; 
Zacharias (585, 586). — Plankton ; distribution of Doliolidce ; Bokgert 
(50). — Reports of biological station at Plon ; Zacharias and others (587). 
Quantitative variations in lacustrine plankton ; Zacharias (585). — 
Comparison of plankton of lakes ; Apstein (12). 
Fauna of Lakes : — The whole fauna has immigrated into the Jake, — 
littoral from marsh and river, pelagic by birds, abyssal differentiated 
in lake itself ; Forel (165). — Classification of freshwater fauna ; 
Weber, M. (559) 
Zoological Regions ; Clarke (95), Wallace (553). 
Faunal Regions : distinctiveness of Africa j Palacky (405). 
Palsearctic and Nearctic regions compared ; Wallace (554). 
Nearctic or Sonoran ; Carpenter (81). 
Exploration of Bahamas and Cuba ; Agassiz (2). 
Antarctica : a vanished Austral land ; Forbes (163). 
3. Morphological. 
Present outlook of morphology ; Howes (251). 
Cirrhostomial theory of head; homologies of oral cirri (Amphioxus, 
Myxine , Siluroids); Pollard (424). 
Evolution of the prasoral lobe : Gradual emancipation of the prseoral 
lobe from the central nervous system, in correlation with change of 
function in the lobe itself, e.g., conversion into locomotor and fixing organ 
as in Ascidian larvae. The nervous parts of the praeoral lobe (apical 
plate and cerebral ganglion) are entirely lacking in Yertebrates, while its 
mesodermic element is represented by the praemandibular head-cavities 
which give rise to most of the eye-muscles ; Willey (579). 
Arches of Vertebrate skull ; Lavocat (297). 
Development of head of Yertebrates ; Kupffer (288). 
Morphology of the limb ; Emery (143), Gegenbaur (181). 
Morphology of the fore-brain ; Studnicka (526). — Brain-anatomy ; 
Burckiiardt (74), Edinger (138). 
Parietal eye, structures of third ventricle, &c. ; Francotte (169).— 
Parapineal body ; Ritter (455). 
Summary as to recent work on digestive system ; von Brunn (70) : 
on integument ; Toldt (539) : on respiratory system ; Merkel (343) : 
on sense organs ; Merkel (342). 
