Bes ree ere) WE V. 
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1894.] Zoology. 891 
(4) In the early part of spring, after the white overhair has been 
shed, the pelage consists of the heavy coat of soft winter underfur. This 
gradually disappears as the summer coat thickens. 
(5) In spring the moult occurs quite as early and proceeds just as 
rapidly in the females as in the males, and the moult is practically com- 
pleted before the young are born. 
These conclusions differ widely from views hitherto entertained by 
both scientifie and non-scientific writers. (Bull Amer. Mus. Nat. 
Hist., 1894.) 
Zoological News. Morrusca.—The characters in the shell of 
Nautilus pompilius, described as sexual by J. Van der Hoeven, are 
believed by Messrs. Bather and Buckman to be due to age rather than 
to sex. In that case a strong point in favor of sexual dimorphism in 
Ammonite shells has lost its value. (Nat. Sci., Vol. VI, 1894.) 
In a discussion of the geographic and hypsometie distribution of 
North American Viviparid:e, Mr. E. Call recognizes four genera, viz., 
Tulotoma, with two species; Lioplax, with two species ; Vivipara, with 
four species; and Campeloma, with nine species. This arrangement is 
based upon the examination of several thousand specimens. Of these 
species, Campeloma decisum Say has the widest range and Vivipara 
troostiana the most restricted. The latter is abundant in a small stream 
near Murfreesboro, Tennessee, and there is no record of its being found 
elsewhere. Vertically, the most of the species lie between 100 and 700 
feet altitude. Here again Campeloma decisum has the greatest range. 
(Am. Jur. Sci., Vol. XLVIII, 1894.) 
Crustacea.—A_ new species of Tanais (T. robustus) is described by 
Mr. H. F. Moore. It inhabits minute tubesin the crevices between the 
scales of the carapace of Thalassochelys caretta. (Proceeds. Phila. 
Acad. Sci., 1894). 
A blind cray-fish from Florida is described by Dr. Lónnberg under 
the name Cambarus acherontis. The specimens we obtained from a 
subterranean rivulet struck about 30 feet below the surface of the 
ground in Orange County. They represent the fourth species of Cam- 
barus found in the United States. (Zool. Anz., 1894.) 
VERTEBRATA.—Dr. Boulenger describes 13 new species of fresh- 
water fishes from Borneo. They are referred to 9 genera of which 
one, Nematabramis, is new. Three species, Nemachilus olivaceus, N. 
saravacensis and an Acanthophthalmus are of special interest as the first 
Cobitines described from Borneo. (Ann. Mag. Nat. Hist, Vol. XIII, 
1894.) 
