Occasional Notes. 383 
long and numerous, black. Chin, chest, belly, and 
inner sides of limbs pale buff, the line of demarca- 
tion from the colour of the sides fairly well de- 
fined. Tail murine in character, thinly haired and scaly 
throughout, the scales large, averaging about eight or 
nine to the centimetre ; the thinly scattered hairs brown 
above, yellowish beneath. 
Measurements of an adult skin : — Head and body (c.) 
190 millim. ; tail 167 ; hind foot 36*2 ; ear (contracted) 55. 
Skull, basal length (c.) 47, greatest breath 26 ; nasals, 
length, 1 5 - 5 interorbital breadth 13; diastema ii'8; 
length of upper molar series n'2. 
This species is readily distinguishable by its peculiar 
coloration from all the known species of Loncheres with 
one exception. This is " Isothrix" pagurus, Wagn. 
from Borba, Brazil, which has much the same coloration, 
but differs from L. guianse by having wholly soft fur. 
That this absence of spines in L. pagurus is not due to 
youth is shown not only by the fa6l that the type speci- 
men is slightly larger than that of L. guianse but also by 
the marked spininess of the second specimen of 
L. guiana? which is only about two-thirds grown. Nor is 
the difference a seasonal one, since the type of L. 
pagurus was captured in July and the smaller Demeraran 
specimen in June, 
♦ 
Gold Mining in California. — Two passages in the 
paper, " Gold Mining Notes" in the last issue of 
Timehri* seem to have been unsatisfactory as to the 
comparison made between Californian and Australian 
Stamping Mills ; and I therefore gladly publish a letter 
* Tintehri, Vol. ii., Pt. I, New Series, pp. 45 and 46. 
