CRUSTACEA NORTH PACIFIC E-XPLORIXG EXPEDITION 191 



maxillipeds rather long and slender. Chelipeds nearly smooth, 

 minntely reticulated above; carpus large, with the front and back 

 margins each armed with three small teeth ; palm of the hand with a 

 row of little spines contiguous to the margin; fingers twisted into 

 an almost vertical plane, and tomentose within ; fingers of the larger 

 hand each one-toothed within ; those of the smaller hand excavated. 

 The color in life is very variable ; it is generally dark greenish, often 

 brownish maculated with white. Length of carapax in the male, 

 0.25 ; breadth, 0.22 inch. 



This species is very closely allied, if not identical, with the P. 

 armata of Dana, 1852 (not of Gibbes, 1850), but appears to differ 

 in its broader front, the middle portion of which is quadridentate 

 and its upper surface not so deeply concave. 



Found among net-weed on a sandy bottom in three fathoms, in 

 the strait between the islands Katonaisima and Ousima ; also on 

 madrepores taken at one fathom depth on the east side of Hong- 

 kong. 



299. PORCELLANA STREPTOCHELES Stimpson 



Fl.xte XXIII, Fig. i 



ForccUana strcptochcles Stimpson, Pi-oc. Acad. Nat. Sci. Phila., x, p. 243 

 [81], 1858. 



Carapax regularly though very slightly convex ; surface glabrous, 

 obsoletely striated, nearly smooth, but scarcely even, the proto- 

 gastric globules being sufficiently prominent. Lateral margin con- 

 vex, acute, and irregularly denticulated in the middle, two of the 

 little teeth being larger than the rest. The front is neither broad 

 nor prominent, but deeply tridentate ; teeth acute ; middle tooth de- 

 filexed and slightly larger, but no more prominent than the lateral 

 ones, and bearing a slight tooth or angle on each side ; lateral teeth 

 sharply triangular. Eyes small. Latero-inferior regions of the 

 carapax longitudinally striated. External maxillipeds slender; 

 ischium small. Chelipeds large, unequal; tooth or summit of meros 

 very prominent; carpus smooth, with the front and back margins 

 each obsoletely 2-3-toothed; smaller hand with a median longi- 

 tudinal ridge or angular prominence, outer margin obsoletely dentic- 

 ulated, pincers twisted into a vertical plane, broadly excavated and 

 pilose within; extremity of immovable finger emarginated. In the 

 larger hand the dactylus is oblique, shorter than the other finger and 

 iDidentate within; immovable finger unidentate within; tips curved. 

 The meros- joints of the ambulatory feet are slender, and almost 

 smooth on the superior margin. 



