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STALK-EYED CRUSTACEA. 



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cerite). In the figures of Ames stirhjnchiis given by Leach,* and by Milne 

 Edwards.t a short stylocerite is discernible^ and in some of the species 

 referred to Axiiis by recent authors, this structure appears to assume larger 

 proportions. For instance^ in Axiim armahis Smithy the stylocerite is de- 

 scribed as ''slender, acute, and more than half as long as the rest of the 

 segment, while the acicle [scaphocerite] is slender, straight, and as long as 

 the fourth segment" I have therefore provisionally united the genera 

 Eiconaxius and Axius,^ 



Axius crista-galli Fax. 



Plate XXVIII., Fig. 1-^1\ 



Bull. Mus. Comp. ZooL, XXIV. 193, "1893. 



This species agrees closely with A\ acidifrom in all its parts except the 

 rostrum and the larger claw, which differ as follows : the margins of the ros- 

 trum, which in A. aoiitifrom 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 ^. acutifrons in lack- 

 ing the serratio.n 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 



For a comparison of the claws of these two species, sec Plate 

 XXVIIL, Fig. 1, 2. The eyes are faceted, but nearly colorless in this species 

 and in A. acutifrons. If Bate's genus Eiconaxius 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 Podoplitlj. Brit., Plate XXXIIL Fig. % 



t Cuvier's Regiie Animal, Disciples' ed., Plate XLYIII. Pig. 2« 



X Proc. U. S. Nat. Mus., III. 433, 1881. 



§ According to Ortmami (Zoolog. Jahrb., Abth. f. Syst., YI. 4G, 1891) tlic presence of sexual appen- 

 dages on the first abdominal somite of tlte male is cliaractcristic of the family Axiidce. But in Eiconaxius 

 acutifrons Bate, and in the closely related species ^^^V/.? crista-galli Pax., 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 

 Eiconaxius farrea are like those of E. acutifrons. 



of the fingers. 





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