PEREZ FARFANTE: AMERICAN SOLENOCERID SHRIMPS 



FIGURE 44. — Eyes. A, Hadropenaeus affinis, 9 21 mm cl, southeast of Cape Lookout, N.C. B, Hadropenaeus modes- 

 tus, 6 11 mm cl, southwest of Dry Tortugas, Fla. C, Hadropenaeus lucasii, 2 18 mm cl, Pailolo Channel, Hawaiian 

 Islands. 



First pereopod, stoutest of all, reaching at least 

 basal 0.65 length of carpocerite, and, at most, 

 exceeding it by tip of dactyl. Second pereopod 

 moderately stout, extending to distal end of carpo- 

 cerite or exceeding it by as much as entire pro- 

 podus. Third pereopod surpassing antennular 

 peduncle by length of dactyl or by entire propodus. 

 Fourth pereopod exceeding antennular peduncle 

 by dactyl and 0.2-0.6 length of propodus; length of 

 dactyl about 0.4 that of propodus; length of carpus 

 about 1.25 times that of merus. Fifth pereopod 

 slender and long, overreaching antennular pe- 

 duncle at least by length of dactyl and propodus, 

 or by as much as their length and almost 0.3 

 length of carpus. Order of pereopods in terms of 

 their maximal anterior extensions: first, second, 

 fourth, third (occasionally third, fourth), and 

 fifth. First pereopod with very long, slender spine 

 on basis, small spine on distomesial margin of 

 ischium, and small one near midlength of mesial 

 margin of merus. Second pereopod with long spine 

 on basis. Coxa of fourth and fifth pereopods in 

 males armed with anterior spine. Coxa of fifth 

 pereopod in females produced mesially into short 

 plate bearing sharp spine anteromesially. 



Abdomen with middorsal keel from fourth 

 through sixth somites; low rounded carina some- 

 times present on third; posterodorsal margin of 

 third, fourth, and fifth somites with median in- 

 cision; sixth somite bearing sharp spine at pos- 



±l^c A 



A 



B 



A 



FIGURE 45. — Hadropenaeus affinis, 9 21.5 mm cl, southeast of 

 Cape Lookout, N.C. A, Mandible. B, First maxilliped. c, Arthro- 

 branchia. c\ Enlargement of c (all from left side). 



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