MARINE MOLLUSCA OF THE SCOTTISH NATIONAL ANTARCTIC EXPEDITION. 125 



Eatoniella hergnelenensis, Sm., forma major, Strebel. 



Eatoniella JcfrgueJenensis, Smith, forma major, Hennann Strebel, Schwed. SwJpoIar Exped., 

 p. 57, Taf. iv. fig. 56 r(-fi(1908). 



/7«^;. —Station 325, Scotia Bay, South Orkneys, 9-10 fathoms. 



This larger form of a mollusc already reported by us, in our former paper, as occur- 

 ring, in its typical condition, at Scotia Bay, South Orkneys, has likewise been discovered 

 in some quantity in Bay A, of greater size and solidity, often encrusted with bryozoic 

 and other growths. Colour very deep plumbeous. 



Family Cerithiidw. 

 Cerithium pulhim, Phil. ( = cselatum, Couthouy). 

 Hah.— An additional locality is now given for this species, to that mentioned on 

 p. 135 of our former paper, viz. Burdwood Bank, lat. 54° 25' S., long. 57° 32' W., in sponge. 

 Station 346. 



We do not repeat the synonymy, which will be found at the page just quoted. 



Bittium hrucei, sp. n. (Plate, fig. 11). 



B. testa minuta, soliiiula, oylindrica, castaiieo-brunnea, anfvactibus ad 8, apicalibus .... (?), ceteris apud 

 siituras impressis, supernis bino, ultimo tfino odine granulato regulariter prredito, apml bnsim excavate, planato, 

 apertura ovata, labro simplice, margiiie columellari crassiusculo. 



Long. 2-75, lat. 1 mm. 



Hah.— Dredge, Station 81, lat. 18° 24' S., long. 37" 58 W., 36 fathoms. 



A minute Cerithioid mollusc, which seems as if it should belong to the sub-genus 

 Joculator, Hedley,* proposed for Gerithiopsis ridicula, Watson, and certain allies. At 

 the same time it is so like Bittium minimum, T. Woods, well figured from a Tasmanian 

 specimen by C. Hedley, t that it had better be included in that genus. 



Bittium burdivoodianum, sp. n. (Plate, fig. 12). 



C. testa fusiformi, bruuneo-rufesoente, parva, anfractibus ad 10, quorum apicales tres rufescentes, 

 pirum nitidi, Ubvbs, vel simpliciter longitudinaliter costuluti, caeteris ad suturas multum impressis, triuo ordine 

 gemmaram, ultimo quatuor ordinibus similibus, regulariter spiraliter prteditis, apertura ovata, labro pauUum 

 efl'uso, columella flexuosa. 



Alt. 4, diara. 1 miii. 



Hab.—Fwm interior of Liothyrina. Station 346, Burdwood Bank, at 56 

 fathoms, December 1, 1903. 



A little species, of simple character, inclined to a reddish hue, particularly as 

 regards the apex and central portion of the various whorls, which are thrice spirally 

 o'irt with regular rows of close grains, gemmulate and rounded. This might be 

 considered a Cerithium by some authors. It is akin to B. hisculptum,X Strebel, the 

 apical whorls seemingly almost identical, and we consider these two species should 

 stand in the same genus. 



* Proc. Linn. Soc. N.H. JVales (1909), p. 442. t Ibid. (1909), p. 722, fig. 20. 



X Sckioed. Sudpolar Exped., p. 49, Taf. vi. tig. 92 a-b (1908). 



(ROY. soc. EDIN. TRANS., VOL. XLVllI., 351.) 



