CRAYFISHES. 389 
is most susceptible to the action of the liquid. After some hours the red colour 
extends over the whole branchial region and for a time is sharply defined from 
the median areola and the other parts of the body, which still retain the dusky 
colour of the living animal. These striking colour-patterns resulting from 
recent immersion in alcohol might easily be mistaken for natural life colours by 
one who had not witnessed the change, and it suggests the probability that some 
writers have been misled into describing such colours as those of the living animal. 
Randall, for instance, in the Journal of the Academy of Natural Sciences of Phila- 
delphia, 8, p. 138, Pl. 7, describes and figures Astacus oreganus (= A. lenius- 
culus Dana?) as having a red spot on each side of the carapace, quite similar to 
the red spot which temporarily shows in Cambarus b. robustus recently immersed 
inalcohol. So, too, the whitish or lemon-yellow spot on the branchiostegites of 
Parastacus bimaculatus Philippi (Anales Universidad Chile, 87, p. 378), which is 
probably the same species that I described under the name Parastacus agassizti 
(cf. the colour description of this species by Prof. Carlos E. Porter in Revista 
Chilena de Historia Natural, 8, p. 258, pl. 9, fig. b) may possibly be the result 
of the action of alcohol on freshly killed specimens. 
CAMBARUS BARTONII LONGULUS (Girard). 
New localities:— West VirGintaA: West Fork of Greenbrier River, near 
Durbin, Pocahontas Co. (U.S. N. M., No. 23,992); Bluestone River, Abb’s Valley 
(U.S. N. M., No. 28,618). 
In normal specimens of this subspecies the sub-orbital angle is hardly if at 
all prominent. The individuals which I mentioned in Proc. U. 8S. N. M., 12, 
p. 623, as having the orbit sharply defined below by a prominent angle may prove 
to be, I suspect, C. bartonii longirostris. This form is not very well known as yet, 
and I have reason to think that it acquires with maturity a claw very much like 
that of C. bartonii longulus. The character of the sub-orbital margin of the 
carapace seems to be very constant within the limits of a good subspecies, and 
it may prove to be the really diagnostic feature for separating C. b. longulus and 
C. b. longirostris. 
CAMBARUS BARTONII VETERANUS, subsp. nov. 
Plate 13, Fig. 2. 
Rostrum long, without lateral teeth, margins elevated, strongly convergent, 
acumen triangular, terminating in an upturned corneous tooth. Antero-lateral 
