372 Albany Museum Records. 



1846. Sjnrifi'r antarcticus^ Moi-ris and Sharpe. 



Quart. Jonrn. Geol. Soc, London, II., ]). 270, PI. XL. 

 fig. 2. 



1846. Spirifrr ca/pensis, von Bnch, Baren Insel, Mem. 



Aead. Sci., Berlin, p. 12, fig. 1. Quart. Journ. GeoL 

 Soc, London, 1847, III., Pt. II., p. 57. 



1847. ?S2>irifp)' bolic/ensis, D'Orb. 



Voyage dans PAmerique meridionale. III., Pal. p. 37, 



VIIL, tab. 2, figs. 8 and 9. 



18f)(). S'pin'ffr iiiacroj)fn-Ns, var. nnieronafu>i, Sandberger. 



G. and F. von Sandbergei', Verstein. rhein. Schichtsyst. 



in Nassau, Wiesbaden. 



1 ^''fi i ^^P^'''f^*' antcircticus, Morris and Sharpe. 

 I ^pirifei' orlngnyi., Morris and Sharpe. 



Sharpe, Trans. Geol. Soc. (2), VIL, pi. 206-7, PI. 

 XXVL, figs. 1-5. 



[ Spirifer cf. pcdroanus, Hartt. 

 1903 < Spirifrr orhif/nyi, Moi-ris and Sharpe. 

 ( Spirifrr sjj. a. 



■Reed, Ann. S. A. Museum, Yol IV., Pt. III., p. ISO, 



PI. XXIL, figs. 4 and 5 ; PI. XXIII, figs. 2 and 3. 



Both Kayser' and Reed^ consider Sharpe's Sjjirifrr orbignyi 



and Sp. antarcticus as identical, with which I agree. Reed states 



that pi-ovided Sjj. orhignyi is really specifically diffeient from 



Sjj. antarcticus, thei: the Cape specimens are all Sj). orbignyi 



and not Sp. antarcticus, because the number of ribs in the latter 



species is too great, the ribs are angulate instead of being rou)ided 



and the sinus on the pedicle valve is angulated. Morris and 



Siiarpe's definition of the species, liowever, agrees closely with the 



Cape specimens, and the number of ribs on the shell cannot be 



o'uaged by the number of ribs on the cast, for most of the smallei- 



ones in the alae do not show througti the substance of the shell. 



As a rule the number of ribs varies from 20 to 24. I reserve the 



name Sji. antarcticus for the Spirifers which have a transversely 



fusiform shape in which the ribs are broad, with moderately deep 



'Zeitschr. dent. Gfol. Gesellsch., XLIX., 1S97, p. 'i97, pi. IX., fig.s. 1-4 

 ^Reed, op. cit., p. 18L 



