FISHERY BULLETIN: VOL. 78, NO. 1 



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FIGURE 4. 



-Munidopsis ciliata, dorsal view of 

 carapace. 



have an inner spine on the third segment of the 

 antennae, which is present in M. ciliata and M. 

 nitida; and the cheliped is 1.5 times as long as the 

 carapace length in M. verrilli, but about the same 

 length in M. ciliata and M. nitida. 



Distribution. — Munidopsis ciliata occurs in the 

 eastern part of Cascadia Basin from 2,030 to 2,875 

 m, off Panama (Faxon 1895) and off the Arrou 

 Islands, Indonesia, (Henderson 1888) in the 

 Pacific Ocean, and the Bay of Bengal, Indian 

 Ocean (Wood-Mason 1891; Alcock 1901). It occurs 

 deeper than M. verrilli, which has only been re- 

 ported off California from San Diego to the Pioneer 

 Seamount at depths of 805-1,618 m (Goodwin 

 1952). No M. verrilli have been found at these 

 depths off Oregon. Goodwin (1952) found M. ver- 



rilli on rock samples. In one beam trawl ( BMT 162) 

 off the Oregon coast, a log was collected at 2,724 m 

 on which there were 33 M. ciliata, 67% of the total 

 M. ciliata caught. 



Munidopsis yaquinensis n. sp. (Figure 5) 



Maierm/. —Holotype, USNM 171340, female, 

 17.4 mm CL, stn CP-3-A, 45°57.1 ' N, 127^32.9' W, 

 BMT 321, 2,763 m; Paratypes: OSUBI 01583, 6 

 males, 12-13 mm CL, stn CP-l-A, 45°56.5' N, 

 125°52.5' W, BMT 251, 2,377 m. 



Diagnosis.— A small species, 12-17 mm CL; large 

 spatulate rostrum with strong carina, small stout 

 eyespines hidden by rostrum; carapace with no 

 spines but covered with small transverse ridges; 

 antennal and anterolateral points of front 

 carapace margin separated by semicircular mar- 

 gin; ambulatory legs with strong anterodorsal 

 carinae. 



Description. — Rostrum wide, spatulate, with 

 crenulated edges, base of rostrum with notch 

 around cornea; dorsal surface of rostrum sparsely 

 covered with setae, strong dorsal median carina 

 from anterior part of rostrum to center of gastric 

 area, median carina not extending to tip of ros- 

 trum; ventral surface of rostrum covered with 

 small setae and with central ridge; length, 4.9 

 mm. 



Carapace length (17.4 mm) greater than an- 

 terior carapace width (8.3 mm), posterior carapace 

 width (11.5 mm), or largest width of carapace (12.2 

 mm); frontal margin with antennal and antero- 

 lateral points separated by semicircular border; 

 lateral margins without spines, forming raised 

 rounded margin; single ridge at posterior border, 

 unarmed; carapace surface covered by small 

 ridges with setae on anterior side, ridges strongly 

 transverse except for those on anterior branchial 

 regions, two larger ridges with crenulated edges 

 on anterior gastric area. 



Sternum covered by very small ridges with long 

 setae. 



Abdomen unarmed, covered with setae, very 

 slight ridges on somites two and three. 



Ocular peduncle movable, with a small, stout, 

 inner eyespine covered by rostrum, eyespine a lit- 

 tle longer than length of unpigmented cornea. 



Basal segment of antennular peduncle with 

 small anterodorsal spine and anteroventral, jag- 

 ged, stout tooth. 



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