PEREZ FARFANTE AMERICAN SOI.ENOCERII) SHRIMPS 



2 June 1964, Oregon stn 4922. 21 c5 15 9, USNM, Wof Cabo de 

 la Vela, 439-448 m, 2 June 1964, Oregon stn 4923. 3 6 2 9, 

 USNM, off Cabo de la Vela, 485 m, 9 October 1965, Oregon 

 stn 5689. 



VENEZUELA— 8 9 , USNM, E of Peninsula de Paraguana, 

 421 m, 27 September 1963, Oregon stn 4406. 4 9, USNM, off 

 Penfnsula de Paraguana, 457 m, 4 October 1963, Oregon stn 

 4419. 4 9, USNM, NE of San Juan de los Cayos, 384-607 m, 

 26 July 1968, Pillsbury stn 753. 3 6 9 9, USNM, off Peninsula 

 de Araya, 402 m, 20 October 1963, Oregon stn 4477. 2 6 9 9, 

 USNM, NE of Islas Los Testigos, 366-439 m, 24 September 1964, 

 Oregon stn 5037. 10 6 11 9, USNM, NE of Islas Los Testigos, 

 388-457 m, 23 September 1958, Oregon stn 2353. 5 6 6 9, 

 USNM, NE of Punta Araguapiche, 366 m, 3 November 1957, 

 Oregon stn 1981. 3 6 3 9, USNM, NE of Punta Araguapiche, 

 457 m, 3 November 1957, Oregon stn 1982. 



GUYANA— 1 6, USNM, off Waini Beach, 137 m, 4 Novem- 

 ber 1957, Oregon stn 1993. 



Description.- Body robust, integument thick, and 

 entirely covered by densely set, short setae (Fig- 

 ure 29). Rostrum almost reaching or slightly 

 overreaching distal end of antennular peduncle, 

 nearly horizontal and straight in large adults, 

 somewhat shorter, elevated, and broadly convex 

 dorsally almost to tip in young; tip saber or spear 

 shaped, 0.2-0.3 rostrum length, longest in adult. 

 Rostral plus epigastric teeth 10-12 (mode 11; 

 N = 200); teeth regularly closer from epigastric 

 to ultimate; epigastric tooth located almost at 

 level of dorsal extremity of cervical sulcus and 

 fourth rostral tooth near level of orbital margin. 

 Adrostral carina slender, extending from orbital 

 margin almost to apex of rostrum; postrostral 

 carina strong, long, almost reaching posterior 

 margin of carapace; small tubercle present behind 

 postrostral carina; antennal carina short but 

 prominent. Orbital spine short, broad basally; 

 postorbital spine slender, rather short, located 

 posterodorsal to base of antennal spine; latter 

 longest of lateral spines on carapace; branchio- 

 stegal spine moderately long; hepatic spine 

 relatively short; pterygostomian spine lacking. 

 Cervical sulcus sinuous, deep, ending lateral to 

 postrostral carina at about midlength of carapace; 

 cervical carina sharp. Hepatic sulcus almost hori- 

 zontal posteriorly, merging with depressed area 

 ventral to hepatic spine, from there inclining 

 anteroventrally, and ending in pit below branchio- 

 stegal spine; hepatic carina accompanying 

 anterior portion of sulcus sharp and prominent; 

 branchiocardiac carina indistinct or barely per- 

 ceptible; submarginal carina well marked, sub- 

 parallel to free ventral margin of carapace. 



Eye (Figure 30E) with basal article produced 

 distomesially into pubescent, broad scale, bearing 



spinelike distal projection; ocular peduncle short, 

 cornea broad, greatest diameter slightly more 

 than twice that of base of ocular peduncle, its 

 proximal margin strongly slanting postero- 

 lateral^. 



Antennular peduncle length equivalent to 

 about 0.6 that of carapace; prosartema ending 

 slightly proximal to distal margin of first article; 

 stylocerite extending only to about 0.45 of 

 distance between its proximal extremity and 

 mesial base of distolateral spine, produced 

 distally into short, rather blunt spine; distolateral 

 spine slender and moderately long, sensibly over- 

 reaching distal margin of article. Antennular 

 flagella (Figure 30A ) rather broad proximally, 

 subfiliform distally, markedly unequal in length, 

 but both long, and increasing proportionately in 

 length with age: dorsal flagellum about 1.4 times 

 carapace length and ventral about 1.2 times cara- 

 pace length, in shrimp 8.5 mm cl, and 3.5 and 2 

 times carapace length, respectively, in shrimp 

 32 mm cl (flagella incomplete in all larger animals 

 examined). Dorsal flagellum with distal half of 

 proximal portion bearing longitudinal row of 

 combs of long setae on slightly concave ventral 

 surface (Figure 30D) and stiff short setae on 

 remaining surfaces; stiff setae increasingly sparse 

 toward tip of flagellum. Ventral flagellum exhibit- 

 ing strong sexual dimorphism: in mature male, 

 proximal portion resembling bottle brush, with 

 mesial surface flattened and bearing longitudinal 

 band of stiff, dense setae with apices directed 

 proximally (Figure SOB); lateral surface armed 

 with numerous, simple setae directed distally 

 (Figure 30C); dorsal and ventral surfaces bearing 

 flexible, plumose setae, most thickly set in comb- 

 like clusters. In females, ventral flagellum with 

 proximal portion covered by long flexible setae. 



Scaphocerite exceeding antennular peduncle by 

 as much as 0.2 of its own length; lateral rib ending 

 in slender spine, falling short of distal margin 

 of lamella. Antennal flagellum long, as much as 

 5 times total length of shrimp. Mandibular palp 

 (Figure 31A) relatively short, extending to about 

 distal extremity of ischiocerite, proximal article 

 1.25 times as long as wide; distal article only 

 slightly longer and narrower than proximal one, 

 tapering to blunt tip. Maxillae and first and 

 second maxillipeds as figured (Figure 31B-E). 

 Two rudimentary arthrobranchiae on somite VII, 

 near base of coxa of first maxilliped (Figure 

 3lDg-g l ), both anterior and posterior arthro- 

 branchiae on somite VIII, and podobranchia on 



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