THE BRACHIOPODA OF THE SCOTTISH NATIONAL ANTARCTIC EXPEDITION. 383 
on the West Patagonian coast; while Liothyrina uva also extends from the Gulf of 
Panama to the Antarctic. 
As a similar, and, in fact, parallel instance of wide distribution in another group of 
animals, I might mention the case of Dentalium megathyris, Dall (=D.- shoplandi, 
M. and &., non Jouss.). | 
This interesting scaphopod was dredged aloig with another new species 
(D. eupatrides, M. and 8.) at the same station and depth (Coats Land, 1410 fathoms). 
It has been met with in deep water at several stations on the western coast of Central 
and South America, viz. off Chiloe Island, and South-East Chili, i 1050 and 1342 
fathoms ; near Galapagos Island in 812 fathoms; off Ecuador in 1740 fathoms ; Gulf of 
Panama, south-west of Tehuantepec, in 2282 fathoms; off Mazatlan in 995 fathoms. 
Terebratella dorsata (Gmelin). (PI. II. figs. 11-13.) 
Anomia dorsata, Gmelin, 1788, Syst. nat., ed. xili., p. 3348. 
Terebratella dorsata (Gmelin), 1887, Davidson, Mon. Recent. Brach., p. 75, pl. xiv. figs. 9-11, 13-19 
(fig. 12 looks like a young Magellania venosa). 
i * 1889, Dall, Proc. U.S. Nat. Mus., vol. xii. p, 231. 
= Ph 1892, Fischer and Oehlert, Bull. Soc. hist. nat. Autun, vol. v. p. 272, 
pl. ix., x., xi, figs, 1-6. 
“A A 1908, Dall, Bull. Mus. Comp. Zool. Harvard Coll, xliu. p. 444. 
es 3 1909, Dall, Proc. U.S. Nat. Mus., vol. xxxvii. p. 279. 
‘3 BS 1912, Blochmann, Die Brach. der Schwed. S.-P. Expedition, Bd. vi. 
(Zoologie ii.), No. 7, Stockholm, p. 11. 
Hab.—Station 346; lat. 54°. 25’ &, long. 57° 32’ W. (Burdwood Bank), 
56 fathoms. December 1, 1903. Sea bottom, Bryozoa. Temperature 41°'8 F. 
Obs.—Dead examples only of this well-known Magellanic species were obtained at 
the above station. These consist, in most cases, of fairly perfect specimens; in others, 
of loose valves only. Allare quite white in colour. 
The examples, for the most part, are representative of adult individuals, and are 
interesting as exhibiting a considerable amount of variation, both in shape and size. 
- The smallest fully-adult example measures: length, 22 mm; breadth, 23 mm.; the 
largest adult is: length, 38 mm. ; breadth, 36 mm. 
Several of the specimens differ from the typical transverse form in being almost 
round, and one example is curious in presenting quite an elongate appearance, calling 
to mind the well-known Australian species, Magellana flavescens (PI. II. fig. 13). 
The beak is largely produced, recurved, as is usual, and truncated by a relatively 
large foramen. One side of the specimen is somewhat distorted in growth, giving the 
shell an asymmetrical appearance. The size of this specimen is: length, 25 mm.; 
breadth, 18°5 mm. ; thickness, 12°5 mm. 
In all the examples obtained the test is remarkably thick and, consequently, quite 
opaque. The radiating ribs on the surface, which in most examples are also visible in 
a reversed order in the interior, differ very largely in the various individuals, some 
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