152 J. WILFRID JACKSON ON 



temperature VS C. Davidson further states that "in the British Museum there 

 are likewise some white specimens stated to have been dredged near the Falkland 

 Islands." 



With regard to the Twofold Bay example, Blochmann (1906, 1908), from a study 

 of the original specimen, states that it is clearly distinct from L. uva, and on the 

 grounds of differences in the brachial support and the number of pores in the shells 

 of both forms, considers it an entirely new species, to which he has given the name 

 of L. fulva. 



Regarding the Buenos Ayres example, I am of the opinion that this also is a different 

 species from L. tiva. According to Davidsijn's figure (" Chall." Rept., pi. ii. fig. 4) 

 it difters widely in outline from that of the type specimen and the additional example 

 figured by him from the Gulf of Tehuantepec {R. B., pL ii. figs. 5-6). The beak is less 

 produced and less compres.sed laterally, and the foramen is smaller. Moreover, the 

 depth (600 fathoms) from which the specimen came is greater than that at which 

 L. uva is known with certainty to live. 



In the above respects the Buenos Ayres example also difters from any of the 

 specimens illustrated by Fischer and Oehlert (1892) and Blochmann (1912) from the 

 Magellanic region, in which the outline of the shell is more pyriform. 



Oehlert (1907 and 1908), in his report on the FJrachiopoda of the French 

 Antarctic Expedition, figures and describes under the name of L. uva some extra- 

 ordinarily large examples obtained presumably from the West Antarctic. For some 

 unexplained reason, no particulars are given in either of these papers as to the exact 

 place of discovery or the depth from which the specimens came. 



The largest example measures : length, 45 ; breadth, 30 ; thickness, 25 mm. 



The species is further recorded for the coast of Guatemala, South Peru, and 

 Galapagos by Dall (1909), but no further particulars are given. 



Recently Blochmann (1912) has described and figured some interesting forms from 

 a depth of 122 fathoms at South Georgia (Swedish Expedition), which up to the present 

 appears to be the limit of its eastern range. 



It would appear, therefore, that the species is widely distributed from Tehuantepec 

 to Cape Horn, Falkland Islands, South Georgia, West Antarctic, and has crept north 

 along the eastern coast of South America as far as Buenos Ayres, if the identification of 

 this example is correct. 



In addition to the Twofold Bay record referred to above, the species has been further 

 recorded from Australian waters. 



Hedley {Mem. Aust. Mus., iv., 1902, p. 289) cites it from Coogee (49-50 fathoms) 

 and Botany Bay (79-80 fathoms), both in the neighbourhood of Sydney. 



Blochmann (1912), however, from a study of one of Hedley's specimens, has been 

 able to satisfactorily demonstrate that the i-eference in question is due to an error in 

 identification, the specimen being referable to Terehratulina cancellata, Koch. 



It is possible also that the later record by Hedley (Records Aust. Mus., vi., 1905, 



(ROY. SOC. EDIN. TRANS., VOL. XLVIII., 374.) 



