FISHERY BULLETIN: VOL. 85. NO. 2 



extends between the gastro-orbital and branchi- 

 ostegal-hepatic carinae. The names of various parts 

 of the eye, adopted from Young (1956, 1959), were 

 recently employed and illustrated by Perez Farfante 

 (1985). The measurement of rostrum length (RL) is 

 the linear distance from apex to orbital margin, that 

 of carapace length (CL) is the distance between or- 

 bital margin and the midposterior margin of the 

 carapace, and, finally, that of total length (TL) is 

 the distance from the apex of the rostrum to poste- 

 rior end of the telson. All measurements are made 

 to the nearest 0.5 mm. The petasmata have been 

 described and all but one depicted unfolded; the il- 

 lustrations were made from stained specimens. Be- 

 cause more than one species have been found in lots 

 reported by various authors under a single name and 

 new species are described herewith from waters 

 from which records have been previously cited, the 

 map is based on only the specimens examined by me. 

 Scales accompanying the illustrations are in milli- 

 meters. 



Abbreviations of the repositories of the specimens 

 examined during this study are as follows: 



BMNH - British Museum (Natural History), London. 

 MP - Museum National d'Histoire Naturelle, Paris. 

 USNM - National Museum of Natural History, 



Smithsonian Institution, Washington, D.C. 

 ZMA - Zoologisch Museum, Amsterdam. 

 ZMB - Zoologisches Museum der Humboldt - Uni- 



versitat, Berlin. 

 ZSI - Zoological Survey of India, Calcutta. 



GENUS PSEUDARISTEUS CROSNIER, 



1978 



Hemipenaeus Bate 1881:186 [part]. 



Aristaeus Wood-Mason and Alcock 1891:278 [part]. 



Aristeus Anderson 1896:91. 



Pseudaristeus Crosnier 1978:81 [type species, by 

 original designation, Aristaeus crassipes Wood- 

 Mason 1891:281. Gender masculine]. 



Diagnosis.— Body slender, covered with densely set 

 minute setae. Rostrum long in females and short or 

 long in males; armed with 2 dorsal teeth; epigastric 

 tooth distinctly posterior to first rostral, situated 

 about 0.1 CL from orbital margin. Antennal and 

 branchiostegal spines present; orbital, pterygo- 

 stomian, and hepatic spines lacking. Cervical sulcus 

 crossing postrostral carina (rarely only reaching it); 

 postcervical sulcus extending to postrostral carina; 

 gastro-orbital, antennal, branchiostegal-hepatic, and 

 branchiocardiac carinae strong; hepatic sulcus long. 



usually fusing with branchiocardiac sulcus and 

 descending obliquely almost to margin of branchi- 

 ostegite. Abdomen with dorsomedian carina extend- 

 ing from fourth through sixth somites; elongate 

 sixth somite bearing pair of long cicatrices. Telson 

 produced posteriorly in sharp, median spine and 

 with posterior 0.4 of length armed with 4 pairs of 

 small, movable, lateral spines. Eye with well- 

 developed cornea and dorsoventrally depressed 

 peduncle bearing mesial tubercle; basal article not 

 produced in scale. Antennular peduncle length about 

 0.55 CL; prosartema rudimentary, consisting of 

 short stump bearing brush of long setae; dorsal 

 flagellum short, about 0.4 length of antennular pe- 

 duncle, and flattened; ventral flagellum long, no less 

 than 2.75 CL, and filiform. Mandibular palp (Fig. 

 L4 ) reaching to about base of ischiocerite (third ar- 

 ticle of antennal peduncle), distal article suboval and 

 much smaller than basal. Palp of first maxilla un- 

 segmented (Fig. IB). Second maxilla and first and 

 second maxillipeds as illustrated (Fig. IC-E). Exo- 

 pods on all maxillipeds but lacking on pereopods. 

 Petasma with dorsomedian lobule short, only about 

 0.4 length of petasma; ventromedian lobule with rib 

 narrow proximally, broadening to level of distal end 

 of dorsomedian lobule where reaching mesial mar- 

 gin, and continuing almost to end of lobule; ventral 

 costa distally free, not attached to dorsolateral 

 lobule; endopod of second pleopod bearing appen- 

 dices masculina and interna. Thelycum of "open 

 type", with large, lanceolate median plate on ster- 

 nite XIII. Well-developed podobranchia on second 

 and third maxillipeds and first and second pereo- 

 pods, those on pereopods subequal in size. One ar- 

 throbranchia on somite VII and two on VIII through 

 XIII, all well developed except very small anterior 

 one on somite VIII. Pleurobranchia on somites IX 

 through XIV, that on XIV well developed, remain- 

 ing ones much smaller. Nonbifurcate, large epipod 

 on somites VII through XII, that on XII subequal 

 in size to that on XI. (Modified from Crosnier 1978.) 



It seems worth emphasizing that although the 

 rostrum is long in females, 0.70-1.40 CL, and rela- 

 tively short in most of the males examined, 0.20- 

 0.57 CL, I have found one male in each of two 

 species with long rostra, 0.70 and 1.40 CL. 



Five species known from the Indo-West Pacific 

 are P. crassipes, P. gracilis, P. kathleenae n. sp., 

 P. protensus n. sp., and P. sibogae; and the one from 

 the southwestern Atlantic is P. speciosus. The 

 species from the Indo-West Pacific have been taken 

 at depths between 750 and 1,785 m and that from 

 the southwestern Atlantic at 4,847 m. These depths 

 and all others cited are those noted for the stations 



312 



