DECAPOD CRUSTACEANS OF THE BEAUFORT, N. C, REGION. 379 



Genus PARAPEN^US Smith. 



Parapen/Eus Smith, 1885a, p. 170. 



KEY TO THE SPECIES. 



a. Dorsal margin of rostrum with less than 12 teeth; eyes of moderate size politus. 



aa. Dorsal margin of rostrum with 12 to 15 teeth; eyes very large megalops. 



Parapenseus politus Smith. PI. xxv, fig. 7. 



ParapentEus politus Smith, r88i, p. 444; ibid., 1885a, p. 172. 



Integument smooth and polished, carapace not setose. Carapace with a low median carina, con- 

 tinuous in front with the rostrum, extending back almost to the posterior margin and bearing a small 

 spine some distance behind base of rostrum. Rostrum arched, distal half deflexed, about as long as 

 eye and falling short of the first article of the antennulary peduncle, dorsal margin with six teeth dimin- 

 ishing in size anteriorly, ventral margin heavily ciliate. Hepatic, antennal and branchiostegal spines 

 well developed, the last placed a little behind the margin of the carapace. A shallow groove extends 

 from behind the eye almost to the posterior margin of the carapace and another, extremely faint, runs 

 upward from the inferior margin at the base of the second pair of legs. 



Abdomen two and one-fourth times as long as carapace; fourth, fifth, and sixth segments carinate, 

 the carina ending on each segment in a small tooth. Sixth abdominal segment a little more than twice 

 the length of the fifth. Telson tapering to a sharp point, furrowed above and with a slender spine on 

 each side near the tip. 



Two specimens, 50 and 60 mm. long, respectively, were taken by the Fish Hawk off Beaufort Inlet 

 in water not exceeding 180 fathoms deep. They differ somewhat, principally in the more strongly 

 ctirved rostrum, from typical P. politus and were at first thought to be specifically distinct, but a careful 

 comparison with the specimens of that species in the United States National Museum shows that these 

 differences are too slight to be worthy of recognition. 



Parapenaeus megalops Smith. PI. xxv, fig. 8. 



ParapetuBus mesaiops S. I. Smith, 1885a, p. 172; Rathbun, 1901, p. 102. 



Covering of abdomen and carapace naked and smooth. Carapace carinate on its anterior half, the 

 carina with a spine behind base of rostrum . Rostrum elevated, arched, terminal half very slender, upper 

 surface armed with 12 to 15 spiniform teeth crowded posteriorly, but becoming more remote and 

 smaller anteriorly; tip reaching to distal end of antennal scales in females; shorter in males. Antennal, 

 hepatic, and branchiostegal spines well developed. No antennal suture. Eyes extremely large, extend- 

 ing laterally beyond carapace. Anteimal peduncles extending beyond eyes less than length of eyes; 

 terminal segment longer than penultimate. 



Foiuth to sixth segments of abdomen with a thin, sharp, median carina. Telson with a lateral as 

 well as two dorsal carinae. 



Length of male, tip of rostrum to tip of telson, 91 mm.; carapace, including rostrum, 24 mm.; ros- 

 trum, 9 mm. 



A few specimens were dredged by the Fish Hawk in deep water off Cape I/xjkout. 



Genus SICYONIA H. Milne-Edwards. 



Sicyonia H. Milne-Edwards, 1830, p. 339. 



KEY TO THE SPEOES OF THE BEAUFORT REGION. 

 a. Dorsal carina of carapace with three teeth. 



b. Rostrum with two teeth above and two or three spines at tip Uzvigata. 



bb. Rostrum with three or fom- teeth above; short; acute at tip brevirosiris. 



aa. Dorsal carina of carapace with two teeth. 



b. Rostrum with three teeth above and one below dorsalis. 



bb. Rostrum with two small teeth above edwardsii. 



Sicyonia laevigata Stimpson. PI. xxv, fig. i. 



Sicyonia lavigataStimpson, 1874, p. 131; Rathbxin, igor. p. 130. 



Integument rather firm , very finely granulate and more or less sculptured. Carapace with a median 

 dorsal carina broken into three nearly equidistant, forwardly directed, acute teeth with tufts of seta 

 between them. Rostrum upturned, its superior margin with two teeth, its tip truncate, with two or 



