NODOSARIINAE 387 



from WS 83, which we also figure (fig. 8), the anterior margin of the final chamber is 

 simple, except at the line of junction of the initial chamber, where there are two pro- 

 jecting solid beads, probably replacing the normal marginal hooks. This specimen is 

 more quadrate in shape, being 0-21 mm. long, by o-i8 mm. broad. 



263. Lingulina translucida, nom.nov. (Plate XII, figs. 9-1 1). 



LinguUna carinata var. scminuda, Heron-Allen and Earland (mow Hantken), 1916, FWS, p. 259, 



pi. xlii, figs. 6, 7. 



Lingulina seminiida, Cushman, 1918, etc., FAO, 1923, p. 95, pi. xvii, fig. 11 (only). 



One station: WS 83. 



The pretty little form which we figured from Scottish waters [ut supra) occurs in some 

 numbers at WS 83, and in view of its wide range and minute size we think Cushman's 

 suggestion (ut supra) that it is distinct from Hantken 's species is probably correct. The 

 original description was: "The test is bilocular, the last chamber forming quite three- 

 fourths of the total bulk of the shell, and furnished with a long curving entosolenian 

 tube which runs diagonally to the lower outer edge of the chamber. The margin of the 

 entire shell is thickened and slightly constricted on its inner edge, so as to form a fine 

 groove running round inside the edge of the shell. These markings we consider homo- 

 logous with the sulci of the deep water form". 



The only comments suggested by the examination of the Falkland Islands specimens 

 are that the oral end of the initial chamber appears to be absorbed, so as to form a large 

 eroded aperture. This was also the case in the Scottish specimens, but as the eroded edge 

 coincided with the sutural line it was overlooked. The groove round the edge is so slight 

 as to be neghgible. The original drawing over-emphasized it. The test is very hyaline, 

 and lenticular in section like the original model of L. carinata (d'Orbigny, 1826, 

 Modele no. 26) to which our species is undoubtedly allied. 



Length, about o-i8 mm.; breadth, 0-15 mm.; thickness, o-io mm. 



264. Lingulina vitrea, sp.n. (Plate XII, figs. 12-14). 

 Three stations: 388; WS 88, 93. 



Test vitreous, smooth, compressed, consisting of a large reniform proloculum, fol- 

 lowed by seven to ten chevron-formed chambers slightly embracing and very gradually 

 increasing in size. Peripheral edge rounded and continuous (without lobulation). The 

 central line of the shell is somewhat depressed, as if gouged out, and the terminal aper 

 ture is simple, without entosolenian tube. 



Length, up to 0-35 mm.; greatest breadth, about o-io mm. 



This is a very distinctive form by reason of its depressed median line ; in some respects 

 this is suggested by the section of the figures of L. carinata published by Haeusler 

 (H. 1890, FST, pi. xiv, fig. 33 a). He refers to the L. elisa of Schwager (S. 1865, FJS, 

 p. 115, pi. iv, figs. 20, 20 a) and his L. ovalis {he. cit. p. 116, pi. iv, figs. 21-24) of which 

 the several figures exhibit a tendency, more or less pronounced, to present this feature, 

 which he describes as "biscuit-shaped". 



DIV 13 



