The Amphipoda of Bermuda 66 



second joint moderatel}- stout with a few setae on anterior and 

 posterior margins ; third joint shorter than broad ; fourth joint tri- 

 angular, twice as long as broad with articulation with wrist near 

 proximal end of anterior margin, posterior margin provided with a 

 few setae; wrist triangular, nearly three times as long as broad, 

 wider than hand, provided scantily with setae ; hand not as long 

 as wrist nor as broad, subrectangular, furnished with fascicles of 

 spines on anterior and posterior margins, palm very short and nearly 

 transverse ; finger of usual form and size w^ith circlet of short setae 

 about ^/s distance to apex. 



Second gnathopods with rounded epimeron bearing subtriangular 

 process posteriorly ; second joint very stout with anterior margin 

 strongly convex and provided with setae ; third joint longer than 

 broad with anterior margin slightly concave and posterior margin 

 convex ; fourth joint shorter than third but scarcely as broad ; wrist 

 articulating with nearly entire anterior margin of fourth joint, tri- 

 angular, twice as long as broad, distal margin transverse; hand 

 somewhat elongate, oval, with rounded apex, anterior margin notched 

 near apex to receive short finger, posterior margin rounded, longer 

 than anterior margin so that hand is weakly chelate, palm short, 

 slightly concave, provided with setae ; finger rather small and curved, 

 not reaching as far distall}^ as hand. 



In male, first gnathopods with trapezoidal epimeron in which the 

 ventral margin is nearly twice as long as dorsal, posteriorly elongated 

 to form a semicircular lobe of moderate size, anterior margin pro- 

 vided with many short sharp spines; second joint moderately long; 

 much broader at distal end than at proximal, provided with setae 

 on anterior and posterior margins ; third joint about as broad as 

 long; fourth joint similar to that of female, twice as long as 

 broad, having articulation with wrist by means of oblique portion 

 of anterior margin ; wrist very long, triangular, having rounded lobe 

 on distal part of posterior margin provided with numerous spines 

 of various sizes ; hand more or less rectangular with distal margin 

 considerably longer than proximal and at right angles to anterior 

 margin, posterior margin strongly convex toward distal end, palm 

 moderately long, passing by even curve into posterior margin, which 

 region is minutely spinulose, palm very finely serrate and provided 

 with numerous submarginal setae ; finger moderately long, not greatly 

 curved, provided with encircling row of setae near middle. 



Second gnathopods with semicircular epimeron slightly longer 

 than high, with numerous short setae on ventral margin ; second 

 joint moderately stout, very slender at proximal end ; third joint 



Trans. Conn. Acad., Vol. XVI. 5 May, 1910. 



