1901.] NATURAL SCIENCES OF PHILADELPHIA. 157 



and there are all intermediate stages between the strongly spinous 

 A. baffini and the almost smooth A. feildeni. 



Sars 10 claims that his A. tuberosus antedates Miers' A. feildeni, 

 giving 1876 as the date of publication of the former. But the 

 Arch. Math, og Naturvid., Vol. 2, p. 3-iO, where the diagnosis of 

 A. tuberosus is printed, bears the date 1877, not 1876. Miers' A. 

 feildeni was published in the Ann. Mag. Nat. Hist., Series 4, Vol. 

 20, p. 14, PI. 3, fig. 1, in the year 1877; but since this volume 

 was not issued before the second half of that year, we may grant 

 the priority of Sars' name, although the date of 1876 is not correct. 



Distribution. — Faroes, Norway, Iceland, Spitzbergen, East 

 Greenland, Davis Straits, West Greenland, North Greenland, 

 Ellesmere Land, Grinnell Land, 5-400 fathoms. 



North Greenland : Cape York (Hansen) , MeCormick Bay (Ives), 

 Murchison Sound (Ohlin) ; Ellesmere Land: Cape Faraday 

 (Ohlin), Cape Sabine (Benedict) ; Grinnell Land: Cape Napo- 

 leon, Dobbin Bay, Franklin Pierce Bay, Floeberg Beach (Miers). 



37. Tole libbeyi (Ortmann). 



Ortmann, The Princeton University Bulletin, Vol. 11, No. 3, February, 

 1900, pp. 39, 40. 



Station 26. Cape Alexander, 27 fathoms (5). 



Length of body 8 mm. Rostrum about as long as the head, 

 directed obliquely upward. Head with one lateral angulation, 

 directed forward. Eyes elliptical. Segments of pereion dorsally 

 smooth, without any spines or tubercles. First segment later- 

 ally with two angulations, both of them directed obliquely forward. 

 Second and third segments with four short angulations, the ante- 

 rior and posterior subequal, the third the smallest. Fourth seg- 

 ment with two angulations, the anterior directed forward, the 

 posterior smaller and directed a little backward. Fifth, sixth and 

 seventh segments with a large anterior and a very small posterior 

 angulation. All the angulations of these segmenis are compara- 

 tively short. Pleon with two bluntly triangular angulations on 

 either side of a bluntly triangular central portion. Uropods 

 about as long as pleon, siyliform, outer branch a little shorter than 

 inner. Flagellum of first antenna 15 articulate ; flagellum of sec- 

 ond antenna with more than 150 annulations. 



10 Den Norske Nordh. Exp. Crust., 1, 1885, p. 109. 



