NOTICES OF NEW BOOKS. 305 
smaller scales, shorter fins, and a less number of pyloric appendages. 
Several specimens were procured in the Victoria Lake (lat. 82° 
34’N.), and in fresh-water lakes near Floeberg Beach (lat. 82° 28’N.). 
The fish which has been named after Sir George Nares is a small 
one, the largest specimen obtained measuring only ten inches in 
length. Several were caught in a freshwater lake near the winter- 
quarters of the ‘ Discovery.’ 
The chief interest attaching to the Mollusca obtained during the 
Arctic Expedition arises from the collections having been made 
at localities further north than any which had been previously 
investigated. The specimens brought home have all been identified 
by Mr. Edgar Smith, of the British Museum, who has made the 
Mollusca his special study, and a new species, Trichotropis tenuis, 
has been found amongst them. A description of this shell, with a 
figure, is given on page 226. A single specimen only was found, 
in twenty-five fathoms, off Cape Louis Napoleon, Grinnell Land 
(lat. 79° 38’ N.), by Capt. Feilden. 
The entomological collections brought home from between the 
parallels of 78° and 83° N. latitude, showed quite unexpected and, 
in some respects, astonishing results. In all, there are about forty- 
five species of true Insecta and sixteen Arachnida. Of the former 
five pertain to Hymenoptera, one to Coleoptera, thirteen to 
Lepidoptera, fifteen to Diptera, one to Hemiptera, seven to 
Mallophaga, and three to Collembola. Of the Arachnida six are 
true spiders and ten are mites. These were all placed in the 
hands of Mr. R. M‘Lachlan for examination, and with the assistance 
of Baron von Osten-Sacken, the Rev. O. P. Cambridge and the late 
Mr. Andrew Murray, a careful report has been drawn up (Appendix, 
pp. 234—239). Mr. M‘Lachlan has no hesitation in saying that 
the most valuable of all the zoological collections brought home 
by the Arctic Expedition are those belonging to the entomological 
section; for they prove the existence of a comparatively rich insect 
fauna, and even of several species of showy butterflies, in very 
high latitudes. Amongst the Insecta is a new ichnenmon ; and two 
new butterflies and four new spiders are described. The only 
species of Coleoptera in the collection is represented by one 
example of the brachelytrous Quedius fulgidus from Discovery 
Bay, a very widely distributed insect, common in Britain. The 
paucity of insects of this order, as Mr. M‘Lachlan observes, is 
inexplicable, 
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