152 SMITHSONIAN MISCELLANEOUS COLLECTIONS 



small, with the external edge acute ; inner edge obtuse, slightly cren- 

 ulated above ; fingers short and weak, much gaping, and smooth 

 within. The dactvli of the ambulatory feet are slender, not dilated, 

 as in some species. 



Beneath the surface is milk white and polished, shining. The 

 sutures of the sternum are deeply impressed, and its postero-lateral 

 angles tuberculiform. The abdomen of the male is moderately 

 broad, the antepenult joint protuberant on either side of the median 

 line; penult joint with convex sides, and armed with a sharp tubercle 

 near the middle, pointing backward. The male abdominal appen- 

 dages exhibit a beautifully close sharp spiral of seven or eight turns. 



This species is of a pale buff color, clouded with darker gray on 

 the anterior part of the carapax, which is also variegated with three 

 white spots on each side of the median line, and two dark spots 

 posteriorly. Dimensions of the carapax in the male: Length, 0.84; 

 breadth, 0.73 inch. 



This species approaches nearest to L. pallida Bell, from which it 

 may be distinguished in its less strongly crenulated margins, in hav- 

 ing only three large tubercles in the thoracic sinus, and in its more 

 slender dactyli. 



Taken near Selio Island, in Caspar Strait, by Capt. John Rodgers, 

 of the steamer "Hancock." 



248. LEUCOSIA HiEMATOSTICTA ' Adams and White 



Lcucosia lunnatnsticta Adams and White, Voy. Samarang, Crust., p. 54, 

 pi. .\ii. fig. 2. 



In our specimen the front is more projecting than in the figure 

 above quoted, and subtriangular. The posterior margin is also con- 

 vex. In the living animal the anterior half of the carapax was 

 bluish-white, the posterior half dotted with red ; a band of crowded 

 red punctae across the middle, interrupted at the median dorsal line. 

 Below white, with a few scattered red dots. 



It was dredged from shelly-sand in twenty fathoms, in Kagosima 

 Bay, Japan. 



Genus MYRA Leach 



249. MYRA FUGAX=(Fabricius) Leach 



Leucosia fugax Fabricius, Suppl., p. 351. 



Myra fugax Le.^ch, Z06I. Misc., in, 24. Milne Edwards, Hist. Nat. des 



^ Leucosidcs hcematosticfa (A. & W.). 

 ' Pcrscphona fugax (Fabricius). 



