52, MR. E. J. MIERS ON CRUSTACEA FROM [Jan. 14, 



MACRURA. 

 Thalassinidea. 



Gebiid^. 

 Gebia major. 

 Gebia major, De Haan, Faun. Japon., Crust, p. 165, pi. xxxv, 



fig. 7 (1849). 



Several s|)ecimens are in the collection from Katzura and Kada 

 Ray, some obtained from coarse sand and gravel 18 to 20 inches below 

 surface. The spiuules on the upper margin of the hand, mentioned 

 by De Haan, are very small, and concealed by the longer hairs, so 

 as to be scarcely distinguishable. 



Caridea. 

 Crangonid^. 

 Paracrangon echinatus. 



Paracrangon echinatus, Dana, Proc. Ac. Nal. Sci. Phil. p. 20 

 (1852); U.S. Expl. Exp. xiii. Crust, i. p. 538, pi. xxxiii. fig. 6 

 (1852) ; Stimpson, Boston Journ. Nat. Hist. v. p. 497 (1857). 



A single specimen, apparently a male, was collected north-east of 

 Yedo Island, in lat. 44° 27' N.^ long. 141° 22' E., and differs in no 

 respect whatever from the Califoruian species described by Dana, 

 which was described from specimens dredged in Puget Sound, and 

 of which authentic examples from California are in the Museum 

 collection, presented by the Smithsonian Institution. 



The occurrence of the single species known of this curious genus 

 (which, with the hands of a Crangon, has the external appearance, 

 elongate rostrum, &c. of a Hippolyte, and which is remarkable for 

 the total obsolescence of the cephalothoracic legs of the second pair) 

 on both sides of the Pacific Ocean is a noteworthy fact ; and it is 

 probable that, with further opportunities of comparison, other species 

 will be shown to have a similarly extended range. 



Alpheid^. 

 Alpheus. 



There is probably scarcely any genus of Crustacea in which the 

 species are more numerous, and which more greatly needs thorough 

 revision than the present. Not only are the characters in them- 

 selves hardly to be defined and accurately appreciated without the 

 aid of well-executed figures, but we do not know at present how far 

 those which are generally adopted in distinguishing the species (i. e. 

 the form and sculpture of the hands and the proportional length 

 of the joints of the wrists of the anterior legs) may be modified by 

 the age and sex of the individual. Under these circumstances it is 

 not without considerable hesitation that I describe below two species 

 tis new, which, however, are distinct from any hitherto recorded, so 

 far as I can judge from the materials available to me for comparison. 



