FISHERY BULLETIN: VOL. 78, NO. 1 



TUFTS 

 PLAIN 



TP-C TP-9 TP-A 



Figure l. — Stations sampled in Cascadia Basin and Tufts Plain, 

 off Oregon and Washington. 



benthic otter trawls (0TB, OT) and beam trawls 

 (BMT) during 13 yr of sampling by Andrew G. 

 Carey, Jr., School of Oceanography, Oregon State 

 University. On Cascadia Basin, samples were col- 

 lected on three north-south lines ranging from the 

 CP-1 line (Figure 1) at the base of the continental 

 slope to the CP-3 line 80 mi farther offshore. The 

 base of the continental slope varies from 1,900 m 

 on the Astoria Fan at CP-l-A to 2,816 m at CP-l-E. 

 At the base of the continental slope farther south, 

 between lat. 43° and 44° N, a small trench occurs 

 in which depths reach 3,000 m. Stations become 

 deeper both to the south and to the west in Cas- 

 cadia Basin. One sample was taken from Gorda 

 Ridge off California, south of Cascadia Basin. Ten 

 tows were made in northern Cascadia Basin on 

 Nitinat Fan off Washington, during a study of 

 deepwater dumpsites (Carey et al. 1973). Three 

 areas (TP-C, TP-B, TP-A) were sampled on Tufts 

 Plain. Station abbreviations are as follows: NAD 

 = Newport hydrographic line, mainly slope sta- 

 tions; CP = Cascadia Basin, off Oregon; TP = 

 Tufts Plain; and DWD = Deepwater dumpsite, 

 northern Cascadia Basin, off Washington. 



The beam trawl is a semiquantitative sampler 

 (Carey and Heyamoto 1972), with a rigid frame of 

 steel skids connected by a 3 m aluminum pipe, 

 with a collecting net of 4.1 cm stretch mesh lined 

 with 1.3 cm mesh net. The otter trawl is a 7 m 

 semiballoon Gulf of Mexico shrimp trawl with 4.1 

 cm stretch mesh with a 1.3 cm mesh liner. Samples 

 were preserved at sea in 10% formaldehyde and 

 sorted in the laboratory. 



The specimens were examined through a dis- 

 secting microscope and measured with vernier 



calipers usually to the nearest millimeter. The 

 following measurements were used (Figure 2): 



Carapace length (CL) = tip of rostrum to middle 

 of posterior margin of carapace. 



Anterior width of carapace = width between an- 

 terolateral spines. 



Posterior width of carapace = width at posterior 

 margin of carapace. 



Rostrum length = tip of rostrum to rostrum 

 base, which lies on an imaginary line between 

 the bases of the ocular peduncles. 



Cheliped length = tip of chela to articulation 

 between ischium and sternum. 



Chela length = tip of chela to articulation be- 

 tween chela and carpus, on the ventral side. 



Eyespine length = tip of eyespine to proximal 

 end of cornea. 



Incomplete synonymies are given for each 

 species. References include original description, 

 first redescription if the original description was 

 very short, first figure, and all synonyms. 



The specimens from Oregon State University 

 (OSU) were compared with those borrowed from 

 the U.S. National Museum (USNM), the Museum 

 of Comparative Zoology at Harvard (MCZ), and 

 from Texas A&M University (TAMU). Specimens 

 of each species are cataloged in the Oregon State 

 University Benthic Invertebrate Museum 

 (OSUBI). The holot5^es and a few paratypes of the 

 new species were deposited at the U.S. National 

 Museum. 



MUNIDOPSIS WHITE AVES 1874 



Munidopsis Whiteaves 1874:212 (original de- 

 scription); Smith 1885:493 (synonomy with 

 Galacantha); Milne-Edwards and Bouvier 

 1894:271, 1897:63 (redescriptions); Faxon 

 1895:81-83 (synonomy with Orophorhynchus, 

 Elasmonotus, Galathodes, and Anoplonotus); 

 Chace 1942:69 (synonomy with Galacantha). 



Galathodes Milne-Edwards 1880:53 (original de- 

 scription); Milne-Edwards and Bouvier 

 1894:276, 1897:94 (redescriptions). 



Orophorhynchus Milne-Edwards 1880:58 (origi- 

 nal description); Milne-Edwards and Bouvier 

 1894:283, 1897:110 (redescriptions). 



Elasmonotus Milne-Edwards 1880:60 (original 

 description); Milne-Edwards and Bouvier 

 1894:279, 1897:98 (redescriptions); Henderson 

 1888:165 (synonomy with GaZaf/iopsis). 



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