WILLIAMS AND BABA: SQUAT LOBSTERS FROM THE PACIFIC OCEAN 



and dactyl. Sternite at base of third maxilliped 

 (Fig. le) forming apposed lobe at either side of 

 midline, outline of each irregularly polygonal but 

 with anteromesial process irregularly serrate on 

 margin and divergent. 



Epipod on coxa of first pereopod (cheliped), 

 but rudimentary on left side and absent on right 

 side of paratype USNM 240201. 



Chelipeds (Fig. If) subequal, with many 

 spines and fewer rugosities tending to arrange- 

 ment in longitudinal tracts; ischium with mesial 

 row of 8 acute spines, irregular smaller spines on 

 disto ventral margin, and smaller spines and 

 rugosities ventrally; merus reaching end of 

 rostioim, bearing row of 7 mesial spines, ter- 

 minal one strongest, about 10 spines along 



Figure 1. — Munidopsis marianica. h(jlot}T)e *: a, carapace, abdominal segments 2-4 m folded position, dorsal; 6, 

 parts of anterior carapace and associated appendages, dorsal: c. parts of anterior cephalothorax and associated append- 

 ages, lateral; d, merus of right third maxilliped with parts of adjacent articles; e, sternites at base of third maxiUipeds 

 and chelipeds; /, right cheUped; g. left fii-st walking leg. Scales; 1(a), 2 (b. c.f), 3 (rf, e. g) = 10 mm. 



901 



