FISHERY BULLETIN: VOL. 75, NO. 2 



Description. -Body rather robust (Figure 24), in- 

 tegument firm and glabrous. Rostrum straight or 

 gently sinuous with upturned tip, moderately 

 long, at most slightly overreaching antennular 

 peduncle, its length 0.45-0.60 that of carapace. 

 Rostral plus epigastric teeth 3-6 (mode 5; N = 

 100); epigastric tooth situated at about 0.3 length 

 of carapace from orbital margin, first rostral at 

 level of, or immediately posterior to, orbital 

 margin. Adrostral carina strong, extending from 

 orbital margin almost to apex of rostrum; post- 

 rostral carina very strong to near posterior 

 margin of carapace, there merging with inconspic- 

 uous dorsal tubercle. Antennal, pterygostomian, 

 postorbital, and hepatic spines long, slender, and 

 sharp; both antennal and postorbital spines 

 (latter situated directly posterior to antennal) 

 continuous with short, blunt, basal carina; basally 

 broad suprahepatic spine (occasionally accom- 

 panied by smaller dorsal one) present, giving rise 

 to deep notch dorsal to hepatic spine; orbito- 

 antennal sulcus shallow, but clearly distinct; 

 cervical carina sharp, cervical sulcus deep, ex- 

 tending to, but not crossing, postrostral carina, its 

 dorsal extremity located almost 0.45 length of 

 carapace from orbital margin; hepatic sulcus 

 deep, hepatic carina sharp anteriorly and turning 

 anteroventrally to base of pterygostomian spine; 

 both hepatic carina and sulcus almost indistinct 

 posteriorly, to anteroventral end of branchio- 

 cardiac sulcus. Branchiocardiac carina long, 

 sinuous, and sharp, accompanying sulcus deep 

 and broad; submarginal carina long, extending 

 from base of pterygostomian spine to posterior 

 margin of carapace. 



Eye (Figure 25) with basal article produced 

 distomesially into pubescent, relatively short 

 scale; ocular peduncle short, bearing rather small 

 mesial tubercle; cornea subreniform, greatest 

 diameter about 2 times that of base of ocular 

 peduncle, strongly slanting posterolaterally. 



Antennular peduncle length equivalent to 

 about 0.5 that of carapace; prosartema broad and 

 short, extending only to distomesial extremity of 

 ocular peduncle; stylocerite extending about 0.6 

 of distance between its proximal extremity and 

 mesial base of distolateral spine; latter moder- 

 ately long, slender, and sharp. Antennular fla- 

 gella long, although incomplete in all specimens 

 examined, in shrimp 32.5 mm cl, broken dorsal 

 flagellum 118 mm long, thus 3.65 times as long 

 as carapace. Scaphocerite overreaching anten- 

 nular peduncle by about 0.2 of its own length; 



FIGURE 25. — Haliporoid.es diomedeae, 2 44.5 mm cl, off Punta 

 Topocalma, Colchagua, Chile. Eye. 



lateral rib ending in rather slender spine, falling 

 short of distal margin of lamella. Antennal fla- 

 gellum broken in specimens examined, according 

 to Illanes and Ziiniga (1972) "longer than total 

 length of body." 



Mandibular palp (Figure 26A ) extending as far 

 as basal 0.4 length of carpocerite; proximal article 

 scalene-triangular, about 2.65 times as long as 

 wide; distal article considerably shorter and 

 narrower than proximal, and tapering to blunt 

 tip. First and second maxillae as illustrated 

 (Figure 26B, C); somite VII bearing single con- 

 spicuous arthrobranchia at base of first maxilli- 

 ped (Figure 26De-e 1 ). Third maxilliped reaching 

 beyond antennular peduncle by tip or by length 

 of dactyl in males and by as much as dactyl and 

 0.5 length of propodus in females; dactyl with 

 acute tip in females, clublike in males, its length 

 0.90-0.95 that of propodus. 



First pereopod reaching between base and 

 distal end of carpocerite in males, and almost to 

 distal end of carpocerite or overreaching it by as 

 much as length of dactyl in females. Second pereo- 

 pod extending, at most, to midlength of second 

 antennular article in males, and as far as distal 

 end of third article in females. Third pereopod 

 reaching distal end of third antennular article 

 or overreaching it by not more than length of 

 dactyl in males, and by entire propodus plus 0.15 

 length of carpus in large females. Fourth pereo- 

 pod exceeding antennular peduncle by, at most, 

 length of dactyl in males, and by dactyl or by 

 entire propodus in females. Fifth pereopod over- 

 reaching antennular peduncle by as much as 

 length of dactyl and 0.8 that of propodus in males, 

 and by distal two podomeres plus 0.15-0.25 length 



292 



