FISHERY BULLETIN; VOL. 78, NO. 1 



Sivertson and Holthuis 1956; Pequegnat and 

 Pequegnat 1970; Laird et al. 1976). 



Mutiidopsis heringana Benedict 1902 



Munidopsis heringana Benedict 1902:279 (origi- 

 nal description), fig. 23. 



Material— \5^^M 134659, male 32 mm CL, 

 male, 29 mm CL, female, 29 mm CL, stn Coos Bay 

 #A, 43°17.3' N, 125°49.3' W, 0TB 76, 3,000 m; 

 OSUBI 00175, female, 31 mm CL, stn CP-2-E, 

 44°40.8' N, 126°26.5' W, 0TB 48, 2,800 m; OSUBI 

 00176, male, 23 mm CL, stn CP-3-D, 44°53.5' N, 

 127°27.5' W, BMT 332, 2,826 m; 20 uncataloged 

 specimens, no ovigerous females. 



Remarks. — Three Oregon specimens (USNM 

 134659) were compared with Benedict's syntypes 

 at the USNM by Henry B. Roberts.^ He found 

 considerable variation between the Oregon 

 specimens and the syntypes regarding number of 

 spines on the gastric area, length and spacing of 

 the rugae on the carapace, and number of spines 

 on the lateral edges of the carapace and on the 

 meri of the chelipeds. The rugae of the Oregon 

 specimens are, in general, shorter, more promi- 

 nent, and more widely separated than the rugae of 

 Benedict's specimens from the Bering Sea. The 

 number of spines on the gastric area of the Oregon 

 specimens varied from 4 to 17, on the lateral edge 

 of the carapace from 2 to 4, and on the meri of the 

 chelipeds from 7 to 12. 



Distribution. — Munidopsis heringana was ob- 

 tained in the deeper portions of Cascadia Basin 

 from 2,800 to 3,041 m, on Tufts Plain from 3,354 to 

 3,990 m, and in the Bering Sea at Alhatross stn 

 3603, 3,276 m (Benedict 1902). 



Munidopsis tuftsi n. sp. (Figure 7) 



Materia/.— Holotype, USNM 171336, male, 70 

 mm CL, stn TP-3, 44°40.8' N, 133°26.3' W, BMT 

 233, 3,717 m; Paratypes: USNM 171337, male, 36 

 mm CL, stn TP-4, 44°31.1' N, 134°43.8' W, 0TB 

 334, 3,858 m; OSUBI 00181, male, 62 mm CL, stn 

 TP-3, 44°39.8' N, 133°37.2' W, BMT 232, 3,724 m; 

 OSUBI 00183, gravid female, 67 mm CL, stn TP-7, 

 44°58.0' N, 133°14.5' W, BMT 302, 3,500 m; 



^Henry B. Roberts, Senior Museum Specialist, U.S. National 

 Museum, Washington, DC 20560, pars, commun. July 1970. 



24 



OSUBI 01582, male, 15 mm CL, stn TP-6, 44°59.8' 

 N, 132°12.1' W, BMT 302, 3,585 m. 



Comparative material. — Munidopsis crassa: 

 USNM 8563, female 45+ mm CL, Alhatross stn 

 2224, 36°16.5' N, 68°21' W, 4,710 m; USNM 

 10803, female, 43 mm CL, Alhatross stn 2573, 

 40°34.3' N, 66°09' W, 3,188 m; USNM 19289, male 

 44 mm CL, Albatross stn 2566, 37°23' N, 68°08' W, 

 4,795 m. Munidopsis aculeata: USNM 21277, 

 male 39 mm CL, Alhatross stn 3382, 6°21.0' N, 

 80°41.0' W, 3,281 m. Munidopsis suhsquamosa: 

 See M. suhsquamosa. 



Diagnosis. — Medium-sized species, 36-70 mm. 

 CL; triangular rostrum with small lateral spines; 

 long eyespines; carapace wider posteriorly than 

 anteriorly, covered with tubercles, first lateral 

 spine not much larger than anterolateral spine; 

 similar to Munidopsis crassa. 



Description. — Rostrum triangular, bearing six 

 (two right, four left) small spines laterally on dis- 

 tal half, upturned distally, dorsal median carina; 

 dorsal surface with small tubercles; ventral sur- 

 face smooth; length 267c of carapace length. 



Carapace longer than wide, anterior width and 

 length measured between first lateral spines less 

 than posterior width; frontal margin bearing an- 

 tennal spines, anterolateral spine on hepatic re- 

 gion with three spinules. First lateral spine on an- 

 terior lobe of branchial region with spinules on 

 anterolateral spine. Several (five or six) small 

 spines on lateral edge behind first lateral spine. 

 Gastric area covered by crenulated tubercles bear- 

 ing setae; six main spines — four at the base of the 

 rostrum, two posterior to these — and numerous 

 slightly smaller spines, smooth spaces between 

 spines and tubercles. Cardiac and posterior 

 branchial areas with crenulated transverse ridges 

 bearing setae, smooth between ridges. Posterior 

 margin unarmed, double ridge of small tubercles. 



Sternum smooth, except for scattered setae on 

 bumps and lateral ridges with many setae on top. 



Abdomen spineless, covered with tubercles; 

 ridges on somites two to four. 



Ocular peduncle slightly moveable, extends 

 beyond unpigmented cornea as stout inner spine, 

 about twice the length of diameter of cornea, 

 spinule on inner side of cornea. 



Basal segment of antennular peduncle with one 

 long slender spine midventrally; one long slender 



