378 BULLETIN OF THE BUREAU OF FISHERIES. 



In Beaufort Harbor and neighboring localities, especially in the brackish creeks to tlie north and 

 east of the town this species is abundant. In suitable places great schools of shrimps are found in 

 the summer and fall and are caught for shipment to northern markets. These schools often consist of 

 both P. brasthensts and P. sctiferus, though the former appears to be the more numerous Locally 

 shrimps are eaten and are in some demand for use as fish bait. Large individuals are found throughout 

 the summer, but those of immature size appear to be most abundant during the early months of the 

 season. In the fall nearly all are full grown and are to be found in large schools outside the harbor 

 where they are fished for with purse nets. At one haul in 1912 in the bight at Cape Lookout 240 boxes 

 weighing about 150 pounds each, were taken and shipped from Beaufort to northern markets. 

 Peneus setiferus (Linnaeus). Shrimp. PI. xxv, fig. 5. 



Cancer setiferus Linnseus, 1767, p. 1054. 

 PentEus JJuviatilis Say, 1818, p. 336. 



Penceus setiferus Milne-Edwards. .S34-.840. p. 4.4 [.837I. .8j7. P. 414; Gibbes, 1850. p. 199; Stimpson, :87., p 133- Kinsley 

 1878-79, p. 330; Fowler, 1912, p. 316. 



In form and general appearance similar to P. brasiliensis but with the median carina of the carapace 

 continued backward only about two-thirds the length of the carapace, not grooved posterioriy with the 

 lateral sulci terminating near the most posterior serration, and provided with nine or ten sharp teeth 

 above, of which the anterior six are on the rostnim proper. Tip of rostrum long and slender the first 

 spme being about opposite the eye, gently upcurved distally, except the tip which is sometimes 

 depressed; lower surface with two teeth. Spine behind eye, hepatic spine and suture below the latter 

 essentially as in P. brasiliensis, cervical groove shorter than in that species. 



Abdominal segments as in P. brasiliensis. 



Peduncle of first antenna considerably and scale of second antenna slightly shorter than rostrum; 

 flagellum of second antenna twice as long as body. 



In life the animal is translucent, almost transparent, bluish white with dusky bands and patches 

 composed of minute scattered black specks. The rostrum and sides are tinged with pink. The blades 

 of the pleopods are marked with dark red. The antennae are dark brown. The uropods have the tips 

 of their blades a very dark bro^vn purple with a narrow stripe of light greenish-yellow along the margin. 

 After death the body whitens and the colors stand out with greater distinctness. 



The longer and more slender rostrum, longer antenna and the shorter sulci lateral to the dorsal 

 carina of the carapace distinguish this species at once from P. brasiliensis. 



This shrimp appears to attain abundance earlier in the summer than does P. brasiliensis and comes 

 to market dunng the last weeks of July or in early August. Several boat loads were seen late in July, 

 1912, the first lots consisting of small specimens, the later ones nearly all full grown. 



Genus TRACHYPENEUS Alcock. 



Trachyt>efieus A\coz\l., 1901, p. 15. 



Trachypeneus constrictus (Stimpson). PI. xxv, fig. 9. 



Penmts cimslrtctus Stimpson. 1871, p. 13s; Kinesley, 1878-79, p. 330. 

 Parapenceus constrictus &m\lh. 1885a, p. 174; Rathbun. 1901. p. loi. 



Integument smooth and polished, dorsal region of carapace with very fine short, appressed seta 

 Carapace carinated on its anterior three-fourths, with a spine behind base of rostrum. Antennal and 

 hepatic spines well developed. Lateral groove extending about three-fifths the length of carapace. 

 Rostrum reaching middle of penultimate segment of first antenna, directed slightly upward its upper 

 margin usually slightly arched and bearing usually seven (7-9) equidistant teeth diminishing in size 

 toward extremity. Peduncle of first antenna extending beyond eye as far as length of eye- very pu- 

 bescent above. Abdomen carinate from fourth to sixth segment. Telson with two rounded carina 

 above, tapenng to a short, acuminate tip, armed on either side with a short spine. 



Length of a female, 54 mm.; carapace, including rostrum, 18 mm.; rostrum, 6 mm. 



Color in life, translucent white, with purplish gray cloudings and blotches; appendages pinkish 



Specimens occasionally occur within the harbor. On the Blackfish Banks it is more common but 

 IS never taken in large numbers. 



