104 STALK-EYED CRUSTACEA. 
cerite). In the figures of Axius stirhynchus given by Leach,* and by Milne 
Edwards,f a short stylocerite is discernible, and in some of the species 
referred to Arius by recent authors, this structure appears to assume larger 
proportions. For instance, in Avis armatus Smith,{ the stylocerite is de- 
scribed as “slender, acute, and more than half as long as the rest of the 
seement, while the acicle [scaphocerite] 1s slender, straight, and as long as 
the fourth segment.” I have therefore provisionally united the genera 
Eiconaxius and Axius§ 
Axius crista-galli Fax. 
Plate XX VIIT., Fig. 1-1". 
Bull. Mus. Comp. Zool, XXIV. 193, 1893. 
This species agrees closely with A. acutifrons in all its parts except the 
rostrum and the larger claw, which differ as follows: the margins of the ros- 
trum, which in A. acutifrons are only microscopically denticulated, are in the 
present species armed with prominent teeth ; the median carina of the ros- 
trum, entire, or at most but slightly serrate in the former species, is here 
cut into about seven prominent teeth, so as to resemble a low cock’s-comb. 
The larger claw (which is on the left side in three specimens, on the right 
side in two) differs from the corresponding structure of A. acutifrons in lack- 
ing the serration on the superior margin of the propodite, in the presence of 
a strong tubercle on the anterior border of the hand between the bases of 
the fingers, and in the absence of prominent teeth on the prehensile edges 
of the fingers. For a comparison of the claws of these two species, see Plate 
XXVIII, Fig. 1, 2. The eyes are faceted, but nearly colorless in this species 
and in A. aculifrons. If Bate’s genus Eiconarius be adopted as a valid one, 
this species will be included in it. 
Length of a male, 24.5 mm.; length of carapace, 10 mm. 
Station 3359. 465 fathoms. 3 males, 1 fem. ovig. 
The female carries eighteen eggs of large size (2 X 1.5 mm.). 
* Malacostraca Podophth. Brit., Plate XXXIII. Fig. 2. 
+ Cuvier’s Régne Animal, Disciples’ ed., Plate XLVIII. Fig. 24. 
+ Proc. U. S. Nat. Mus., III. 433, 1881. 
§ According to Ortmann (Zoolog. Jahrb., Abth. f. Syst., VI. 46, 1891) the presence of sexual appen- 
dages on the first abdominal somite of the male is characteristic of the family Aviide. But in Hiconaxius 
acutifrons Bate, and in the closely related species Avius crista-galli Fax., the first abdominal somite is entirely 
devoid of appendages in the male sex, and Ortmann (op. cit., p. 50) states that the abdominal appendages of 
Hiconaxius farree are like those of #. acutifrons. 
