20 



fra AiiU'1-ikas nord- og østkyst indtil New England, Grøn- 

 land. Island, Si:)itsl)ergen, Murmankysten, Barentshavet, 

 Novaja Senilja, Karahavet og videre ostover indtil Cha- 

 tangabugten. Den bathymetriske udbredelse er 30 — 1456 

 fv. Fossil er area glaciaJis kjendt fra Gronland, Nord- 

 anierika, Slietlandsøerne, Skandinavien, nordlige Rusland 

 og Sicilien. 



also fonnd oft' tlie nortii coast of North America, and the 

 east coast down to New England, in (_Treenland, leeland, 

 Spitsbergen, on the Murman Coast, in the Barcnts Sea, 

 Novaja Semlja, the Kara Sea, and eastwards as far as 

 Chatauga Bay. Its bathymetrical distriljution is from 30 

 to 1456 fathoms. Area glaeialis is found as a fossil in 

 Greenland, North America, Shetland Isles, Scandinavia, 

 the north of Rassia, and Sicily. 



Area frielei, Jeffreys. 



Arra frielei, Jeffreys, m. s. Friele, Nyt Mag. f. Natiirvidensk., vol. 23, 1877. p. 2. 

 _ _ Jeffreys, Proc. Zool Soc. 1879, p. 573, Pl. 45, fig. 4, 4 a. 



— — Friele, Jahrb. Deut. Mal. Gesell, vol. 0, 1879. p. 266, Pl. 4, tig. 9. 



— imitata, Smith, Rep. Sei. Res. Challenger Exp. Zool., vol. 13, part. 35, 1885. p. 321. 



Arca^ frielei kan ikke saasom af VerrilP) og Kobelt^) 

 lietragtes som en varietet af area pectunculoides, thi fra 

 denne art og dens varieteter ndmærker den sig ved sin 

 tilspidsede stærkt triangulære form. Hos area frielei er 

 endvidere de fra umbonerne udgaaende ribber mere frem- 

 trædende og mindre talrige. Skallets vel udviklede liaar- 

 lieklædning er endvidere af en grovere struktur end hos 

 area peetuneidoides. Verrill synes ganske at iiave niisopfattet 

 denne art; vi tør ikke med bestenithed paastaa, at det er 

 area pectiineitJoides han har afbildet, men under ingen om- 

 stændiglieder er det formen frielei. Uoverensstemmelsen 

 mellem VerrilTs og Jeffreys's tegninger har forøvrigt ogsaa 

 Locard^) været opma-rksom paa; han bemærker med rette, 

 at han har vanskelig for at identificere dem. 



Under n;ivnet ajra imitata beskriver og afbilder 

 E. A. Smith en bivalv, som ,,Challenger" erholdt i den 

 nordlige del af Det stille ocean (station 244. 2900 fv.). 

 Denne art iiar den samme form, den samme striering af 

 skallet o, s. v. som area frielei, og baado beskrivelse og 

 tegning passer paa denne, hvorfor vi maa anse dem for 

 identiske. 



Pindested. Stationerne 40, 51, 53, 248, 283, 295, 

 303, 312 og 353. Dybde 658—1539 fv. 



Arten er tidligere funden af ..Porcupine" i Færø- 

 kanalen (1869, stat. 65, 345 fv.). ,,Caudan" har den fra 

 Biskayerbugten, 239 fv., „Hirondelle" og ..Princesse Alice" 

 fra Azorerne (691 — 851 fv.), ..Travailleur" fra kysten af 

 Senegambien, 55 fv., og ,,Challenger" fra Det stille ocean. 

 Denne sidste localitet synes at tyde paa, at denne dyb- 

 vandsart har en kosmopolitisk udbredelse. Den bathy- 

 metriske udbredelse er 55 — 2900 fv. 



6. 



') Trans. Conneoticut Acad., vol. y, 1882, j^. .'>74, tab. 44, fio-. 

 ■-) Mart. Chemu. Conch. Cab., vol. 8, part 2, 1891, p. 2l;l. 

 ■') JIoll. Test. Exp. Sei., „ Travailleur-' & „Talismaiv, \ol. 2, 1898, 

 p. 320. 



It is impossible to regard Area frielei, as Verrill') 

 and Kobelt-j have done, as a variety of Area pectuncidoides, 

 for it differs from tliat species and its varieties in its 

 pointed, very trianguiar shape. In Area frielei, moreover, 

 the ribs issuing from the nmbones are more prominent and 

 less numerous. Further, the well-developed hairy covering 

 of the shell is of a coarser structure tlian in .1. pevtnii- 

 eidoidcs. Verrill seenis to have altogether misunderstood 

 this sjjecies. \Ve would not venture to assert that it is 

 .4.. pectitiiculoides that he has figured, but at any rate it is 

 not A. frielei. Locard-'') has also noticed the differeiice be- 

 tween VerrilFs and Jeffreys's drawings. He justly reniarks 

 that he has a difficulty in idontifying tiiem. 



E. A. Smith describes and figures under the name of 

 Ai'ca imitata. a bivalve found by the 'Challenger' in tiie 

 nortliern part of tiu' Pacific (Station 244; 2900 fathoms). 

 This species has tiie same shape, tlie same stria tion of 

 the valve. etc. as .4. Jrielei, which answers in every way 

 botli to the description and the drawing. We may there- 

 fore regard tliem ;is identical. 



Locality. Stations 40, 51, 53, 248, 283, 295, 303, 

 312, and 353. Depth 658—1539 fathoms. 



Tiie species has been found by the 'Porcupine' in 

 the Faroe Channel (1869, Station 65; 345 fathoms), tiie 

 'Caudan' in the Bay of Biscay (239 fathoms), tiie 'Hiron- 

 delle" and tiie 'Princess Alice' in the Azores (691 — 851 

 fathoms), the 'Travailleur' off the coast of Senegambia (55 

 fathoms). and the 'Challenger' in the Pacific. The last- 

 named locality seems to indicate that this deep-water spe- 

 cies bas a cosmopolitan distribution. Its batiiymetrical 

 distribution is from 55 to 2900 fatiioms. 



') Trans. Conneftirut AUaJ. Vol. .'>. 1882, p. 574, Pl. XLIV. figs. .'>, ti. 

 -) Mart. Chcmn. Conch. Calj. Vol. 8, part 2, 1891, p. 21:!. 

 ^) JloU. Test. Exp. Sei. 'Travailleur' & 'Talisman". Vul. TI, 1898, 

 p. 320. 



