254 



TENTH ANNUAL KEPOBT 



Male, I Form. iColor reddish-(crimson) browD, not obviously fig- 

 ured; tail lighter; fin chestnut, marked with gray; chelae bright crim' 

 son below there are green markings on the body and legs, and some 

 yellow below. 



The hands are rather narrow and straight, while the "thumb" is 

 deeply excavated for one -third its length, and the notch thus formed is 

 armed with three or four teeth; the finger opposite has a tooth half 

 way fi*om the apex, and others near the base; the ange at base of thumb 

 is densely hairy. The penultimate and previous joint of second foot 

 bears a very dense and thick tuft of hairs on the inner margin Avhich it 

 particularly noticeable in living specimens. The antennae are short 

 about as long as the thorax when reflexed. 



The first pair of abdominal feet resemble those of C. virilis some- 

 what, but are stouter and less divided. They are more strongly curved 

 than in C. propinciuus. 



The laminae of anteunae are much as in C. troglodyles but wider at 

 the base. 



The second form has the two branches of the abdominal foot united 

 almost to the end. The young males have the chelae greenish-blue and 

 mottled, while the coloration of the body is like the females. 



The females have shorter chelae, and broader abdomen marked with 

 chestnut bars on each segment above. 



A male 3.3 in. long was still in form II, while au other 3.2 in. long 

 was in the form I. Found by hundreds in a shallow pool known as 

 Grass Lake, in Richfield, Hen. Co. 



Fig. 7. 

 Camharus signifer. 

 a chela, h lamina of antenna, c rostrum, 

 form II. e abdominal foot of form I. 



d abdominal foot of 



