16 BULLETIN 54, UNITED STATES NATIONAL MUSEUM. 



and five articles, while in T. alascensis the uropoda are composed of a 

 peduncle and six articles; and in the smaller size of the specimens. 



It is named in honor of Rev. A. M. Norman, the distinguished 

 carcinologist. 



3. Genus CRYPTOCOPE Sars. 



E} 7 es wanting. Abdomen composed of six segments. Pleopoda in 

 female very small and rudimentary; those in the male well developed. 

 Incubatory pouch formed of two lamella? issuing from the bases of 

 the fourth pair of legs. Uropoda in female short, biramose, rami 

 very unequal; those in male much more fully developed. First 

 gnathopods strong and similar in structure in both sexes. Mandibles 

 well developed, with the cutting edge coarsely dentated, and having on 

 the right mandible a rather large secondary lamella; molar expansion 

 well defined. 



CRYPTOCOPE ARCTICA Hansen. 



Oryptocope arctica HANSEN, Dijmphna-Togt. zool.-bot. Udb., 1887, p. 209, pi. 

 xxi, fig. 4; Vidensk. Meddel. Fra. den Naturh. Foren. i Kjobh., 1887-88, 

 p. 180, pi. vn, fig. 1-lc. STEBBING, Ann. Mag. Nat. Hist. (7), V, 1900, 

 p. 12. RICHARDSON, American Naturalist, XXXIV, 1900, p. 211; Proc. 

 U. S. Nat. Mus., XXIII, 1901, p. 502. 



Localities. Greenland; Kara Sea; latitude 72 20' north, longitude 

 59 39' west. 



Depth. 100-170 fathoms. 



Description of female. The body is subcylindrical, about four and 

 a half times longer than wide. 



The head becomes gradual^ narrower toward the front, with the 



anterior margin somewhat pro- 

 duced, the apex being obtuse. 

 Eyes absent. The first pair of 

 antennae are composed of four 

 tapering articles, and are one- 

 fourth shorter than the head; the 

 basal article is two-fifths the 



FIG. 19. CRYPTOCOPE ARCTICA (AFTER HANSEN). length of the antenna?, is cvlin- 



drical when seen from the side- 

 seen from above, gradually stouter toward the base; the second article 

 is more than one-half times longer than the third and somewhat shorter 

 than the fourth article. Each article is furnished with setae at the 

 distal end of the external angle. The apex of the fourth article is 

 furnished with numerous long seta?. The second pair of antenna? are 

 slender, composed of five articles, and are somewhat shorter than the 

 antenna? of the first pair. 



See Sara for characters of genus, 



