FISHERY BULLETIN: VOL 77, NO 4 



120. 26 1 9 , ZSI 2589-95/10, N of North Anda- 

 man I (14°13' N, 93^40' E), 677-766 m, 8 April 

 1898, Investigator stn 235. 



Diagnosis. — Rostrum straight or sinuous 

 (occasionally convex basally, straight anteriorly), 

 and long, reaching or overreaching third antennu- 

 lar article. Anteroventral extremity of ceirapace 

 forming angle of about 90"; hepatic spine located 

 at about same level as that of antennal spine; 

 branchiocardiac carina with anterior end very 

 close to hepatic sulcus. Telson with three pairs of 

 movable spines. Petasma with proximal plate of 

 dorsomedian lobule bearing mesial crest; proxi- 

 mal process of rib of dorsolateral lobule subcircu- 

 lar; ventral costa ending distally in short, rela- 

 tively narrow process. Thelycal plate of sternite 

 XIV with anterior border broadly arched on each 

 side of posteromedian protuberance of sternite 

 XIII and strongly inclined posterolaterally; an- 

 terolateral and posterolateral corners of plate 

 arched; median ridge broadest and most salient 

 posteriorly, often gradually tapering anteriorly, 

 sometimes reduced to posterior tubercle; median 

 plate of sternite XIII subsemicircular to trilobed. 



Description. — Rostrum (Figures 15, 16) almost 

 horizontal, straight or slightly sinuous (occasion- 



ally convex basally, straight anteriorly), falling 

 short of to overreaching distal margin of anten- 

 nular peduncle, its length 0.8-0.9 that of 

 carapace. Rostral plus epigastric teeth 12-16 

 (usually 12-14), second (occasionally first) rostral 

 tooth situated in line with orbital margin, basal 

 teeth close together, those toward apex more 

 widely spaced, and extending almost to tip of ros- 

 trum, but sometimes only to base of anterior 0.2. 

 Postrostral carina extending posteriorly to about 

 level of dorsal extremity of cervical sulcus; mi- 

 nute dorsal tubercle located near posterior mar- 

 gin of carapace. Antennal spine moderately long; 

 antennal carina short but prominent. Hepatic 

 spine slightly larger than, and situated at about 

 same level as (rather than ventral to), antennal 

 spine. Anteroventral extremity of carapace form- 

 ing angle of about 90° (Figure 17A). Cervical 

 carina sharp, accompanying sulcus well marked; 

 hepatic carina slanting sinuously from below 

 hepatic spine to pterygostomian spine; bran- 

 chiocardiac carina strong, with anterior extrem- 

 ity almost reaching posterior end of hepatic sul- 

 cus and extending posteriorly to near margin of 

 carapace. 



Antennular peduncle with length equivalent to 

 about 0.75 that of carapace, third article slightly 

 stouter and longer in mature male than in 



Figure 15. — Penaeopsis jerryi, i 17.5 mm cl, offBerbera, Gulf of Aden, Somalia. Lateral view. Scale = 5 mm. 



738 



