FISHERY BULLETIN: VOL. 75, NO. 2 



PANAMA— 1 2 , RMNH, Golfo de los Mosquitos, 664-681 m, 

 21 July 1966, Pillsbury stn 447. 



COLOMBIA— 1 9 , USNM, Golfo del Darien, 731 m, 28 May 

 1964, Oregon stn 4902. 



VENEZUELA— 1 9, USNM, E of San Juan de los Cayos, 

 421 m, 9 October 1963, Oregon stn 4439. 



GUYANA— 1 9, USNM, N of Fort York, 1,373-1,446 m, 

 15 July 1968, Pillsbury stn 689. 



AZORES ISLANDS— 1 9, MP, between Pico and Sao 

 Jorge, 1,257 m, 15 August 1883, Talisman stn 139. 



MOROCCO — 4 d39 syntypes of Haliporus debilis var. 

 africanus Bouvier, MP, off Mazaghan, 1,319 m, 14 June 1883, 

 Talisman stn 21. 1 6 9 9 , MP, off Cap Cantin, 1,590 m, 17 June 

 1883, Talisman stn 33. 



Description-Body slender, integument thin, 



flexible and glabrous (Figure 3). Rostrum straight 



or slightly to strongly upturned, moderately long, 



reaching as far as distal end of second antennular 



article, its length not greater than 0.55 that of 



carapace, low and with dorsal and ventral mar- 



8-11 

 gins straight. Rostral plus epigastric teeth Q.4 



9-10 

 (usually ~~2 , only 3% lacking ventral teeth); 



epigastric tooth located at about 0.4 cl from orbital 

 margin, first rostral tooth (largest of all) at about 

 0.3 cl, and third above orbital margin; ventral 

 teeth variously arranged, either closely grouped 

 together or rather broadly spaced. Adrostral ca- 

 rina low and sharp, extending from orbital margin 

 almost to apex of rostrum; orbital margin project- 

 ing anteroventrally in narrow shelf. Postrostral 

 carina strong to just caudal to cervical sulcus, 

 weak posteriorly, and followed by minute dorsal 

 tubercle very near margin of carapace. Lateral 



spines on carapace slender and sharp: postorbital 

 spine situated directly posterior to antennal and 

 almost as long as branchiostegal; latter (largest of 

 all) continuous with short, sharp basal carina; 

 pterygostomian spine absent. Cervical carina 

 sharp, cervical sulcus deep, extending to, but not 

 crossing, postrostral carina, its dorsal extremity 

 located at 0.55 cl from orbital margin, or slightly 

 more posteriorly; hepatic sulcus with two ventral 

 convexities, extending from below hepatic spine 

 to anterior end of branchiocardiac sulcus; weak 

 posthepatic carina extending posteriorly from 

 junction of latter sulci. Branchiocardiac carina 

 strong, accompanying sulcus moderately deep; 

 submarginal carina slender, extending along 

 entire length of branchiostegite. 



Eye (Figure 4B) with basal article produced 

 mesially into small scale. Cornea broad, its great- 

 est diameter approximately twice that of base of 

 ocular peduncle (1.6-2.1, x 1.95; N = 32), and pro- 

 portion of diameter to carapace length varying 

 between 15.5 and 23.0, x 19.7. Cornea subreni- 

 form, with proximal margin oblique, slanting 

 posterolaterally; an imaginary line drawn paral- 

 lel to base of short ocular peduncle at level of its 

 mesial tubercle intersects cornea. 



Antennular peduncle length equivalent to 

 about 0.55 that of carapace; prosartema short, not 

 quite reaching distomesial margin of cornea, fall- 

 ing short of distal margin of first antennular arti- 

 cle, but its long distal setae overlapping base of 

 second article; stylocerite rather short, its length 

 about 0.6 of distance between its proximal extrem- 



FlGURE 4. — Eyes. A, Hymenopenaeus laevis, 9 21 mm cl, off Martha's Vineyard, Mass. B, Hymenopenaeus 

 debilis, 6 10.5 mm cl, northwest of Great Stirrup Cay, Bahama Islands. C, Hymenopenaeus aphoticus, V 18mmcl, 

 northwest of Penfnsula de la Guajira, Colombia. 



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