A REVIEW OF THE VOLUTIDAE 



63 



enamel. Spire high, conical, subscalar. 

 Apex small and sharp, helng originally 

 mamlllated, but subsequently eroded and 

 enamelled. Whorls seven to eight, at the 

 top very slightly shouldered and angulated, 

 then flatly convex. Suture oblique, com- 

 pletely burled In a thick coat of glaze 

 which fills the sutural angle and which em- 

 braces the whole apex. Mouth large, pear- 

 shaped, with a shallow, broad, obliquely 

 truncated canal In front. Outer lip thin 

 and rounded on the edge; It is cut off 

 from the body by a strongly marked sinus, 

 below which It advances prominently Into a 

 rounded angle, retreating slightly, but 

 steadily, from this point throughout Its 

 whole course; It is straight and slightly 

 contracted above, roundly angulated and 

 patulous below the middle, straight and 

 patulous and cut off backwards from this 

 point to the edge of the canal. Inner lip 

 scarcely convex above, little concave in 

 the middle, direct with a very slight twist 

 and no swelling below; near the edge are 

 two narrow, slight, white, very oblique 

 teeth, of which the upper is sometimes ab- 

 sent: the narrow sharp lamina of the pil- 

 lar-edge in front is the extreme point of 

 the shell. 



This is an extremely peculiar form 

 of great beauty. It is higher and narrower 

 than the measurements would suggest, the 

 outthrow of the outer lip being great, but 

 of short continuance. It has a strong gen- 

 eral resemblance to Eburna ^labrata Llnne, 

 or Eburna vernedel Sowerby, or other small- 

 er species of that form, of which it simu- 

 lates the subperipheral band. In Valuta 

 [Amoria) pallida Gray, some of the peculiar 

 features of this species (such as the su- 

 tural sinus, the enamelled spire, and the 

 outthrow of the outer lip at its lower 

 corner) are found, though in a much feebler 

 form. 



The swelling on the pillar which is 

 characteristic of the Volutes, and is real- 

 ly the scar of the old columellar sinus, is 

 in this species quite absent in front, but 

 is just recognizable on 'the back of the 

 shell in the flexure of the lines of growth 

 (Watson) . 



Genus AURINIA H. and A. Adams 1853 

 Aurlnia H. and A. Adams, Genera Rec. Moll. 



1, p. 166, 1853. Type A. (voluta) dubta 

 Broderlp (Subgenus of Pulgorarla) : Gray 

 in Adam's Gen. Rec. Moll., 11, p. 617, 

 1858, ex parte; Crosse; Jour, de Conchyl., 

 19, p. 307, I87I; Fischer; Man. de 

 Conchyl., p. 6O8, Dec. 1883; ex parte; 

 Dall: Trans. Wagn. Inst., Ill, p. 70, 

 1890. 



Maculopeplum Dall: Nautilus, vol. 19, 

 no. 12, p. 143, April, I906. 



Scaphella (sp.) Swainson: Zool. Illust., 

 2nd series, 11, no. 19, I832. 



Caricella {sp.) Conrad: Jour. Acad. Nat. 

 Scl. Phlla., 2nd series, 1, p. 120. 



Scaphella Dall: Bull. Mus. Comp. Zool., 8, 

 p. 147, 1889; Trans, Wagner Inst. Ill, 

 p. 79, 1890. 



Voluta (sp.) Broderlp: Zool. Joum., Ill, 

 p. 81, January, I827. 



Fusus (sp.) Schubert and Wagner: Conch. 

 Cab., 12, p. 24, 1829. 



Voluti fusus Conrad: Proc. Acad. Nat. Scl. 

 Phlla,, 1862, p. 563, March, I863; sole 

 ex, Fasciolarta mutabtlls Conrad: Jour. 

 Acad. Nat. Scl., 7, p. 135 1834; Am. 

 Journ. Conch., 11, p. 66, I866; V. typus 

 Conrad, Miocene of North Carolina. 



Livonia Gray, ollm. H. and A. Adams: Gen. 

 Rec, Moll., 11, p. 617, 1858; not Livona 

 Gray, Guide Moll. B. M., p. I56,, 1842. 



Genotype: Aurlnia dohrnl dohrni (Sowerby). 



Range: Atlantic Ocean off Cape Hatteras, 

 North Carolina, southward to the Gulf 

 of Mexico and including the Caribbean. 



This genus Is a degenerate descend- 

 ant from the Eocene Caricella . The usually 

 few, indistinct, plaits upon the colmnella, 

 together with the thin shell and conspicu- 

 ous Caricella-like nucleus are distinguish- 

 ing features. Another significant detail 

 is the very small size of the radula which 

 has been observed in only one or two spe- 

 cies. 



Aurlnia dohrnl dohrni (Sowerby) I9O3 

 (Plate 6, Figure 51) 



Voluta dubta Broderlp, Zool. Jour., Ill, 

 p. 81, pi. Ill, fig. 1, 1828; Sowerby, 

 Thes, Conch,, 1, pi. 55, fig. 115, 1847; 

 Reeve, Conch. Icon., Voluta, pi. 22, 

 fig. 59, 1849. 



*The Adams brothers designated Voluta dubla Broderlp as the genotype of their Aurinla. The validity of 

 that species Is now very questlonahle and In view of this fact It appears desirable to designate a new 

 genotype, the most logical choice being A- dohrni dohrni. 



