24 [respiration in sand-burrowing crabs. 
through the posterior aperture, and is itself supplied with 
innumerable streams which percolate from, the surrounding 
sand through the channel between chelipeds and carapace, 
as well as through the filters formed by the interlocking rows 
of hairs on the legs. 
By these and other instances which were copiously illustrated 
with the lantern, Mr. Garstang showed that the diversity of 
form in this group of animals is explicable as a series of special 
adaptations to different modes of life, and urged the importance 
of a comparative study of the habits, as well as of the structure, 
of each group of animals in which, as naturalists, they were 
severally interested. 
LITERATURE. 
Garstang, W. — 
(i) “ The Habits and Respiratory Mechanism of Corysles 
cassivelaunus ‘ Journal of the Marine Biological Association’ ; 
vol. iv., No. 3, 1896, pp. 223 — 232 
id. (2) “ The Function of Antero-lateral Denticulations of the Carapace 
in Sand-burrowing Crabs.” Journ. M.B.A., vol. iv., No. 4, 
1S97, pp. 396—401. 
id. (3) “ The Systematic Features, Habits and Respiratory Phenomena 
of Portumnus nasutus.” l.c. pp. 402 — 407. 
id. (4) “ On some Modifications of Structure subservient to Respiration 
in Decapod Crustacea which burrow in Sand.” Quart, four. 
Micr. Science (N.S.) xl. pp. 211 — 232, Plates 12 — 14. 
[The observations on the habits of Atelecyclus recorded above have not 
hitherto been published. — IV. G.] 
