FISHERY BULLETIN: VOL. 75, NO. 2 



convex; tip about 0.2 length of rostrum. Rostral 

 plus epigastric teeth 6-8 (mode 7; percentage 

 distribution: 6-13.3, 7-83.3, 8-3.3; N = 60); third 

 rostral tooth usually situated at level of orbital 

 margin. Adrostral carina extending from orbital 

 margin to base of ultimate tooth, and shorter, 

 more dorsal, conspicuous carina extending from 

 second rostral tooth to penultimate; postrostral 

 carina ending immediately behind cervical sul- 

 cus. Orbital margin produced anteriorly into 

 ventrally inclined, short shelf. Postorbital spine, 

 longest of four lateral spines on carapace, usually 

 more slender than middorsal teeth on carapace, 

 and located dorsal to base of small antennal spine; 

 branchiostegal and hepatic spines sharp. Cervical 

 sulcus deep, ending dorsally just anterior to mid- 

 length of carapace, near postrostral carina; cer- 

 vical carina sharp; hepatic sulcus subhorizontal 

 posteriorly, originating almost at level of dorsal 

 extremity of cervical sulcus, shallow and inclined 

 anteroventrally from depressed area below he- 

 patic spine to pit below branchiostegal spine. 



Eye as illustrated (Figure 44C). 



Antennular peduncle length equivalent to 0.65 

 that of carapace; prosartema long, conspicuously 

 overreaching distomesial margin of first article; 

 stylocerite length about 0.65 of distance between 



its proximal extremity and mesial base of disto- 

 lateral spine; latter very slender and long, con- 

 siderably surpassing proximal margin of second 

 article. Antennular flagella long and considerably 

 unequal in length, dorsal 1.85 times carapace 

 length and ventral 1.30 in shrimp 12.5 mm cl, 

 and 1.35 and 0.90, respectively, in shrimp 27 mm 

 cl; dorsal flagellum subcylindrical, ventral sub- 

 cylindrical to depressed. Scaphocerite reaching to 

 distal margin of antennular peduncle or over- 

 reaching it by as much as 0.15 of its own length; 

 lateral rib ending in spine reaching to, or slightly 

 beyond, distal margin of lamella. Antennal flagel- 

 lum long, although incomplete in all specimens, 

 longest observed 3 times total length of shrimp. 

 Mandibular palp with article as long as or slightly 

 shorter than basal, reaching between midlength 

 and distal 0.35 of carpocerite. Third maxilliped 

 reaching to midlength of third antennular article 

 or overreaching it by as much as 0.5 length of 

 propodus; length of dactyl 0.75 that of propodus. 

 First pereopod, stoutest of five, reaching be- 

 tween midlength and distal 0.15 of carpocerite. 

 Second pereopod extending to distal end of carpo- 

 cerite or overreaching it by as much as entire 

 length of dactyl. Third pereopod overreaching 

 antennular peduncle by 0.5 length of dactyl or by 



FIGURE 54.— Hadropenaeus lucasii, 6 13 mm cl, Pailolo Channel, Hawaiian Islands. A, Petasma (partly bent laterally), dorsal view 

 of right half. B, Ventral view. C, Right appendices masculina and interna, dorsolateral view. D, Ventromesial view. 



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