46 



Fishery Bulletin 88(1), 1990 



Redescription: Cancer productus Randall 



TL 5.6-6.4 mm. CL 3.1-3.6 mm. 



Carapace (Fig. 4A) Considerably longer than broad, 

 naked, lateral spines reduced to small, sometimes in- 

 distinct knobs, pair of gastric prominences present. 

 Rostrum well developed and with ventromedial tuber- 

 cle, dorsal spine projecting posteriorly over 1st and 2nd 

 abdominal somites. Eyes well developed, corneae 

 slightly dilated. 



Antennule (Fig. 3A) Biramous; peduncle 3-seg- 

 mented, proximal segment broadly expanded and with 

 6-14 scattered setae, penultumate segment with 3-5 

 distal plumose setae, ultimate segment with 1 seta. 

 Exopod 4-segmented, basal segment naked, 2nd seg- 

 ment with 7-12 aesthetascs, 3rd segment with 5-9 

 aesthetascs and 2 or 3 marginal setae, 4th segment 

 with 3-5 aesthetascs, 1 submarginal and 1 terminal 

 seta. Endopod indistinctly 2-segmented, proximal seg- 

 ment naked, distal segment with 2 marginal and 3 or 

 4 terminal plumose setae. 



Antenna (Fig. 3B) Peduncle 3-segmented: tlagellum 

 with 8 articles; setal formula varying from 4,2,4.0.0, 

 4,0,4,0,3,4 to 6,3,4,0,0,5,0,5,0,4,5. 



Mandible (Fig. 3C) Molar and incisor processes not 

 distinguishable. Mandibular palp 2-.segmented. prox- 

 imal segment naked, distal segment with 10-12 mar- 

 ginal setae. 



Maxillule (Fig. 3D) Endopod indistinctly 2-seg- 

 mented, proximal segment with 1 or 2 marginal setae, 

 distal segment with 0-2 terminal setae. Coxal endite 

 with 10-19 setae. Basal endite with 22-24 terminal 

 setae/spines and 4 or 5 marginal setae basally. 



Maxilla (Fig. 3E) Endopod expanded basally and with 

 4 marginal setae in proximal half, 1 short terminal seta. 

 Proximal lobe of coxal endite with 2-4 terminal and 

 1 or 2 subterminal plumose setae, distal lobe with 2-5 

 terminal and 2 or 3 subterminal plumose setae. Prox- 

 imal lobe of basal endite with 9 or 10 terminal and 1-3 

 subterminal plumose setae, distal loiie with 8 or 9 ter- 

 minal and 1 subterminal plumo.se setae. Scaphognathite 



