Boone, Crustacea, Cruises of ''Eagle'' and "Ara," 1921-28 193 



first five abdominal segments are carinated and are each produced 

 posteriorly into a short dorsal process. The telson is linguiform with 

 the lateral margins evenly curved, the end densely spinose ; the apical 

 spines are rather short, with their posterior margins serrate. The 

 uropoda are shorter than the telson. The eyes are pyriform. The 

 scaphocerite is about twice as long as wide, with the distal end of the 

 blade rounded and only protruding a little beyond the distal spine of 

 the outer lateral margin. 



Synonymy. — Gnathophausia willemoesia G. 0. Sars, Forhandl. Vi- 

 densk. Selsk. Christiania, No. 7, p. 6, 1883; Kept. Voy. ''Chal- 

 lenger," Zool., Schizopoda, vol. 13, p. 38, pi. V, figs. 1-6, 1885.— 

 Faxon, Mem. Mus. Comp. Zool., vol. 18, p. 215, color plate K, fig. 

 1, 1895. 



Genus : MEGANYCTIPHANES Holt and Tattersall. 



Meganyctiphanes norvegica (M. Sars). 

 Plate 72. 



Type: Sars' type was taken in the Christiana Fjord, Norway, and 

 deposited in the museum. 



Material examined : Six specimens dredged 9 miles S. W. of Port 

 Basque, Newfoundland, 200 fms., September, 1926, by the "Ara." 



Range: The North Atlantic Ocean, including the coasts of North 

 America and Northern Europe ; surface to bathypelagie. 



Technical description : Animal slender, abdominal segments much 

 compressed; the carapace with the cervical groove sharply defined, 

 separating the median anterior third of the carapace from the hinder 

 part and bifurcating on the anterior lateral region, as indicated in the 

 figure. The rostral carina extends as far posteriorly as the cervical 

 groove and terminates anteriorly in a slight median point ; viewed dor- 

 sally, the frontal margin has a slight median point which is rounded 

 on either side and runs a little backward to unite with the slightly 

 ridged, elevated triangular peak which forms the orbital spine and 

 which is acuminate distally. There is a very smair spine at the base 

 of the antennae. The posterior half of the lateral margin is somewhat 

 produced and rounded. The posterior margin is concave in the median 

 region, then produced on the upper lateral portion into a rounded 

 process which is separated by a slightly narrower rounded sinus from 

 the wider convex lobe of the postlateral margin. The abdominal seg- 

 ments have the proportions and contour shown in the figure ; the telson 

 is very long, slender and acuminate, the dorsal surface flattened and 



