132 DISCOVERY REPORTS 



*St. 1775, 44° 40-3' S., 00° 33-5' E.-44° 40' S., 00° 37' E., South Atlantic, 27. v. 36, N 70 V, 750-500 m., 2 specimens. 



*tSt. 1778, 52° 14-7' S., 00° i' W.-52° 12-8' S., 00° 07' E., South Atlantic, 30. v. 36, N 70 V, 1500-1000 m. 



St. 1913, 53° 55-2' S., 56° 457' W., South Atlantic, Patagonian Shelf, i. xii. 36, N 70 B, 250-160 m., i specimen. 



*St. 2024, 45° 01-3' S., 00° 337' E., South Atlantic, 30. iii. 37, N 70 V, 500-250 m., i specimen. 



*tSt. 2356, 42° 56-8' S., 00° 21-2' E., South Atlantic, 7. vii. 38, N 70 V, 750-500 m., i specimen. 



*St. 2386, 44' 04-9' S., 00° 15-4' E., South Atlantic, 12. viii. 38, N 70 V, 750-500 m., i specimen. 



*St. 2496, 50° 207' S., 01° 03-3' E., South Atlantic, 2. xii. 38, N 70 V, 1000-750 m., i specimen. 



St. 2582, 39° 53-9' S., 00° 39-1' E., South Atlantic, 20. ii. 39, N 100 B, 1050-750 m., 2 specimens. 



St. 2641, 00° 45-3' S., 07° 26-6' W., Equatorial Atlantic, off W. Africa, 16. iv. 39, N 50 V, loo-o m., i specimen. 



St. 3230, 47° 30' N., 07° 35' W., Bay of Biscay, 14. v. 55, N 70 V, 500-250 m., 2 specimens, N 70 V, 750-500 m., 

 I specimen. 



St. 3233, 46° 02' N., 09° 19' W., Bay of Biscay, 15. v. 55, N 70 V, 250-100 m., 4 specimens, 500-0 m., i specimen. 



St. 3234, 43° 13' N., 12° 04' W., W. of Cape Finisterre, 17. v. 55, N 70 V, 500-250 m., 2 specimens, N 70 V, 

 750-500 m., 2 specimens, N 70 V, looo-o m., 6 specimens. 



St. 3272, 45° 51' N., 08° 43' W., Bay of Biscay, 27. vi. 55, TYFB, looo-o m., 8 specimens. 



St. 3273, 46° 27' N., 08° 04' W., Bay of Biscay, 27. vi. 55, N 70 V, 500-250 m., 3 specimens, 750-500 m., 

 I specimen. 



'Carnegie VI r 



St. 49/50, 26° 27' S., 115° 21' W., E. South Pacific, 28. xi. 28, surface, 2 specimens. 



St. 93, 14° 41' S., 167° 41' W., South Pacific, between Tahiti and Samoa, 31. iii. 29, surface, 6 specimens. 



F.R.V. 'Explorer' 

 St. E 52/1305, 58° 38' N., 8° 21' W., N.W. of Scotland, 24. vi. 52, 500-0 m., i specimen. 



GEOGRAPHICAL DISTRIBUTION 

 Earlier records of Tetraplatia indicated that it had a world-wide distribution although there were 

 large areas, especially in the Indian Ocean, the North Atlantic and in the Central and South Pacific, 

 where it had not been found. Dantan (1925) gives excellent figures of this species. 



The new records of geographical distribution are given in the list of specimens. No new records 

 are available for the Indian Ocean. 



Formerly, Tetraplatia was not known farther north in the Atlantic Ocean than about the latitude 

 of Gibraltar; now there are several new records of it. In 1900 H.M.S. 'Research' took it at three 

 stations in the Bay of Biscay J; recently 'Discovery IT took it in 1955 at a neighbouring station, as 

 well as at four other positions to the south-west (Fig. i). The most northerly recorded position for 

 the species is that of 'Explorer' (58° 38' N., 8° 21' W.); these records from the North Atlantic suggest 

 that Tetraplatia occurs in deep water along the west coasts of the British Isles. 



Farther south, 'Discovery II' captured the species off the equatorial West African region (St. 2641), 

 at a series of stations (Sts. 1773, 1775, 1778, 2024, 2356, 2386, 2496, 2582) all approximately along 

 the 0° line, between 38° S. and 52° S. in the South Atlantic, and at two other localities to the west 

 (Sts. 670 and 1913) (Fig. 2). 



Three interesting records come from the Pacific. Previously Tetraplatia was only known from off 

 Japan (Komai, 1939), off the Californian coast, off equatorial South America (Hand, 1955) and off 

 Chile (Beyer, 1955), but the new localities from the South Pacific ('Carnegie' St. 49/50 and St. 93 

 and 'Discovery II' St. 943) indicate that the species must have a wide distribution throughout the 

 greater part of the Pacific (Fig. 2). Consideration of all the records now available implies that the 

 species may occur in all oceans between 52° S. and 58° N. 



J For details of stations, see Browne (1906). 



