DECAPODS 



137 



NECTOCRANGON LAR (Owen). 



Crangon lar OWEN, in Zoology of Capt. Beechey's Voyage [of the Blossom}, 



Crustacea, p. 88, pi. xxvin, fig. i, 1839. 



Argis lar KROYER, Naturh. Tidssk., iv, 255, pi. v, figs. 45-62, 1842. 

 Nectocrangon lar STIMPSON, Proc. Acad. Nat. Sci. Phila., 25, 1860. ORT- 



MANN, Proc. Acad. Nat. Sci. Phila., 181, 1895. 



Female. Carapace about two fifths or one third as long as the abdo- 

 men ; two spines on the median line, the distance between them being 

 greater than the distance from the anterior spine to the anterior margin, 

 and about equal to or less than the distance from the posterior spine to 



FIG. 74. Nectocrangon lar. a. Dorsal view of carapace and abdomen. S (nat. size). Station 3643. 

 b. Side view of carapace and part of abdomen. 8 (nat. size). Station 3642. c. Side view of abdomen. 

 (X ij). Station 3779. 



the posterior margin. Sometimes there is a tubercle behind the rostral 

 spine. A low blunt irregular carina runs from the orbit nearly to the 

 posterior margin; below this a spine on either side; a short antennal 

 spine on the anterior margin. Blade of antennal scale exceeding the spine. 

 Hands of first pair of feet from three and a half to four times as long 

 as the width of the palm. The anterior margin forms an angle of about 

 forty-five degrees with the side margins. First to fifth abdominal seg- 

 ments furnished with a sharp median carina ; sixth seg- 

 ment with two sharp carinas, which toward the posterior 

 end become lower and may disappear altogether in 

 front of the posterior margin. Pleura of first four 

 segments with rounded entire angles ; fifth and sixth 



. . FIG. 75. Nectocran- 



segments with an acute tooth or small spine at the^/^<x ?i). Aci- 



... . cle. 9 . Station 3642. b. 



postero-mrenor angles ; sixth segment with a supero- chela, t . station 3779 . 



. . ,.i,i c. Chela, 9. Station 3642. 



lateral spine on each side of the posterior margin. 



Seventh segment with two blunt carinse armed with three pairs of spin- 



ules on the terminal half. 



Dimensions. Female, length 79.2 mm., length of carapace 21.5 mm. 



Male. The male differs markedly from the female. It is much smaller. 

 The eyes are considerably larger. The anterior margin of the hand is 



