150 KXI'KDITION TO POINT BARROW. ALASKA. 



Il hiis broii found in Greenland and Labrador and at Capo Krusonstern, Alaska. (See Biiiril, 

 loo. cit.) 



J)r. Packard has kindly examined these specimens, and siiys that they do not differ from thoso 

 brought by Dr. Uessels from Polaris Kay. 



39. POLYARTEMIA HAZENI Murdoch. 



(Plate II, (ins. '.I;..) 



Year. NMN 



1884 I'olyarlemlu haieni, Murdoch Proe. T. S. "Sat. Mils., vii, p. 'L'J 



CitMticun. 



Specimens of a species of Phyllopod, fouud in abundance, near the station, were examined by 

 Dr. Packard, who declared that they belonged to the genus ]'<>lynrtr>ni<t. but were different from the 

 Single species (P. forciputn) of this genus, described by Fischer in Middendortf s Sibirische Reise, ii, 

 pt. i, p. 154, pi. vii, figs. 24-28 (1851). 



1 therefore decided to describe this as a new species under the name of I'oli/in-tcmi 1m:i'tii, 

 after General W. B. Hazen. Chief Signal Officer. I '. S. A., to whom the species is respectfully dedi- 

 cated. 



I u.srmi'Tiox. Body long (twice the length of the abdomen) and stout. Legs generally sev- 

 enteen pairs, males usually with one pair more than the females. Head in the male prolonged 

 anteriorly into a short, thin, lamellar process. Male "claspers" large, stout, broad, and palmate, 

 strongly incurved. From the middle of the lower edge projects a large curved process armed on 

 the tip and inner surface with numerous fine teeth. The extremity of the -'clasper" is bifurcated 

 into two short, blunt branches, also armed on the inner side with fine teeth. Feet short and broad- 

 Caudal appendages small and slender, a little longer than the last abdominal segment. Ovisac 

 voluminous, nearly as long as the abdomen; end rounded, with a short, tooth-like process on each 

 side. Color, when living, a pale, iridescent green. 



Museum numbers, 7929, 7930, 7931. 



The species was first observed July 13, 1882, in large numbers, copulating, in the pools on 

 the black tundra. 



It is not so widely distributed as Branch! nevta paludosa, which occurs in the same pools. It 

 swims very swiftly and is very hard to catch. 



ClRRIPEDIA. 

 40. BALANUS up. 



Small barnacles were quite plenty on gastropod shells near the station, and a single large <:iu< 

 which I cannot identify was dredged off Point Franklin. (This is probably B. porcatus). 



ItHI/OeEPHAI,A. 

 41. PELTOGASTER PAGURI Rathke. 



Year. N:iiu<-. ( 'ii.n inns. 



1H1 /" <>n'i. H. K';]thkc' KrisebemcM ku'ui-n. X.-uc-s!.- S. hril'rc-n <!rv X;il in IcKsHn-mliMi 



( Ic-si-lN. li.-ctl in D.in/i::. ii. p. 1(1,"., pi. \ i, li- 



1S4:: PcltogasUr paguri, II. K:i|]il.c- No, . Ai I. Ac-,ui.(';i-~. L.-m.. c.n. \:ii Cm . cx,p. 245.pl. xii,"flg.l7. 



iK.'.ii Pettogtuta paguri, l.ill.ji-liorg !.. genre's l.iricij tPeltogaster II Kaibl.c-. i].:\irnii .ic>s N'c.\ 



A.I. Ki-'_'. Si.i-. Sc.-i. l"|i?iil.i. SIT. :i. iii., p. _':>. ii-s. !.'_'. ::n-:;."' 



' Packard. Mc-ln. I'.nsl. SCH-. X;lt. I list., i, p 



l,-7."i /'./'.. '/"v'.-y- j,n'!>'l-:. I.iitlvC-ll \1 I'tic- M:lllll:ll, p. Hi:; lllci:nil!:ll !i^l I. 



lss:i l'rlt,: : /.i*ti-i- lai'ju.'t. Smith I'rnr. \ . S. Xul. Mils., vi. 'JL'J, '.MJ. 



