FISHERY BULLETIN: VOL. 87. NO. 1 



what she called Calappa angusta, saying that the 

 narrow span across the posterolateral winglike pro- 

 jections of the young of that species broadened with 

 age into a full Caiappa-like form. Analysis of mea- 

 surements on a large series of specimens does not 

 support this viewpoint (see Figure 2), and we there- 

 fore choose to erect the new genus for reception of 

 these two small species. 



Key to species of Cyclozodion 



1 . Carapace smooth to slightly tuberculate; front 

 with central lobe shallowly concave, margin 

 smooth; chelipeds with upper surface of 



carpus smooth C. angustum 



Carapace definitely tuberculate; front with 

 broadly concave central lobe sharply granular 

 near tip and on margins continuous with 

 mesial margin of lateral lobe; chelipeds with 



upper surface of carpus tuberculate 



C. tuberatum 



Cyclozodion angustum (A. Milne Edwards 1880) 



Figures 2, 3 



Calappa angusta A. Milne Edwards 1880:18 

 (part).-A. Milne Edwards and Bouvier 1902:123, 

 pi. 24, figs. 5-8; pi. 25, figs. 1-3; p. 125, fixed type 

 locality. -Rathbun 1937:210 (part, selected 

 juveniles).- Williams 1965:154; 1984:273 (part, 

 selected juveniles). 



Material studied.— MCZ 6653. Juvenile holotype; 

 off Barbados, 183 m; Hassler, 27-30 Dec. 1871.- 

 MCZ 2702. 1 o- (juv.) paratype; off Barbados, 188 

 m; Blake stn. 273, 1878-79.-MCZ 2917. 1 juv. para- 

 type; N Yucatan, Mexico, 23°13'N, 89°16'W, 154 

 m; Blake stn. 86, 1877-78. 



Florida: USNM 101419. 1 9; off Cape Canaveral, 

 27°30'N, 78°52'W, 421 m; Combat stn. 238, 3 Feb. 

 1957.-Silver Bay stn. 2480. 1 o-, 2 9; 26°06'N, 

 79°10'W, 223-229 m; dredge, 9 Nov. 1960.-2445. 

 1 o- (juv.); Straits of Florida, 24°08'N, 80°08'W, 252 

 m; dredge, 3 Nov. 1960.-2452. 4 ct, 4 9, 3 9 ovig.; 

 same, 23°30'N, 79°04'W, 228-238 m; dredge, 5 

 Nov. 1960. 



Silver Bay stn. 3467. 1 juv.; off Great Bahama 

 Bank, 27°27'N, 79°00'W, 229-274 m; dredge, 25 

 Oct. 1961.-3502. 1 juv.; S Great Inagua I., 20°54'N, 

 73°37'W, 137-183 m; dredge, 5 Nov. 1961.-3496. 

 1 9; same, 20°53'N, 73°42'W, 183 m; dredge, 4 Nov. 

 1961.-5193. 1 0-, 1 9 (ovig.); Puerto Rico, W 

 Mayaguez, 18°16'N, 67°22'W, 274 m; trawl, 18 Oct. 



1963.— Oregroti stn. 2643. 1 juv.; off Virgin Gorda, 

 B.W.I., 18°03'N, 64°27'W, 274-329 m; trawl, 5 Oct. 

 1959.-6715. 2 cr, 1 9; W Anguilla I., 18°36'N, 

 63°27'W. 201-238 m; dredge, 30 May 1967.-5015. 

 2 9 (juv.); off Barbados, 13°02'N, 59°34'W, 201- 

 247 m; dredge, 20 Sept. 1964.-USNM 110230. 1 

 9; same, 91-336 m; J. B. Lewis, NR4-2, date un- 

 known.-USNM 110231. 1 juv.; same, NR8-2.- 

 USNM 110232. 1 o-(juv.); same, NR12-4. -Oregon 

 stn. 4932. 1 9; Honduras Banks off Thunder Knoll, 

 16°06'N, 81°10'W, 165 m; dredge, 9 June 

 1964.-4928. 1 o-, 1 9 (juvs.); Colombia off Isla Pro- 

 videncia, 14°05'N, 81°21'W, 183 m; dredge, 8 June 

 l9U.-Oregon 11 stn. 10190. 1 9; Nicaragua, off 

 Mosquito Coast, 14°42'N, 81°38'W, 141 m; dredge, 

 19 Nov. 1968.-10515. 1 9 (ovig.); Guyana, N New 

 Amsterdam, 07°47'N, 57°12'W, 95 m; trawl, 28 

 Apr. 1969. 



Description.— Ca.ra.pa.ce convex, slightly more 

 arched in longitudinal than in transverse profile, 

 length 0.94 width; surface densely but smoothly and 

 uniformly covered with closely crowded granules; 

 obsolescent raised tubercles in median longitudinal 

 row on gastric and cardiac regions and in more or 

 less concentric arcs on branchial regions; raised 

 median tract separated from branchial regions by 

 well-defined longitudinal depression at either side 

 extending from protogastric to intestinal region; 

 anterolateral margin regularly convex, minutely 

 granulate; posterolateral margin extended into 

 winglike prolongation bearing 1 large spine pre- 

 ceded by 3 or 4 much smaller spines, and succeeded 

 by a single obsolescent spine and imperceptibly 

 curved sector converging toward obscurely trilobed 

 posterior margin. 



Front trilobed, broader than orbits; broad central 

 lobe concave in dorsal view, downturned, rounded 

 tip not visible; narrower lateral lobes slightly diver- 

 gent, partly enveloping curved antennular peduncles 

 folded obliquely at slightly less than 45° angle to 

 each other; orbits raised above surrounding region 

 but not markedly so, a single obscure dorsal fissure; 

 mean maximal interorbital distance 0.60 mean max- 

 imal span between principal spines on posterolateral 

 winglike extensions. 



Chelipeds with ornamentation on extensor surface 

 not well divided into horizontal zones typical of many 

 calappid species; lower margin with almost uniform- 

 ly crowded obsolescent granules merging into a field 

 of similar granules extending over lower 1/2 of sur- 

 face; horizontal row of 3-5 low tubercles subparallel 

 to lower margin; 4 or 5 similar scattered tubercles 

 tending to arrangement in diagonal rows in central 



110 



