BULLINA. 175- 



Adceon (?) chariis Watson, Jouru. Linn. Soc. Lond., xvii, p. 

 288.—^. {Adeonina) chariis Wats., Chall. Rep. Gastr., p. 633, pi. 

 47, f. 7. 



This species is very slightly like Adceon exilis Jeffr., still more 

 Adceon bovetemis Seguenza, but is obviously different from both. 



Genus BULLINA Ferussac, 1821. 



Bullina Fer., Tab. Syst., p. xxx, 1821, proposed for Bulla undii- 

 lata Brug., physis, amplustre, scahra and velum Dillw. — H. & A. Ad., 

 Gen. Rec. Moll., ii, p. 8. — A. Ad., in Sowb., Thesaurus Conch., ii, p. 

 563. — Bullinula (Beck) Swains., Malacol. p. 360, type B. lineata 

 Sow., Man. £ 253.— Gray, P. Z. S. 1847, p. 162. 



Shell oval, generally rimate, with shoi't, projedincj spire, sinistral 

 apex, and large, swollen body-whorl ; rather thin, spirally pundate- 

 grooved, decorated with red or brown lines. Aperture about three- 

 fourths the shells' length, narrow above, widened below ; the colum- 

 ella vertical, often with an indistinct fold above, obliquely trunccded 

 at base. Operculum small, horny, linear, transverse. Type B. scabra. 



This genus differs from other Adiconidce in the style of coloring,, 

 the rather large distorted apex, and the very distinct basal trunca- 

 tion of the columella, more marked than in Ridaxis. 



In Ferassac's publication of the name Bullina, no diagnosis is 

 given, and his list of species includes representatives of four genera. 

 The first species named, '' Bulla undulcda Brug." (evidently an error 

 for B. undata Brug.), cannot be considered the type because Brug- 

 uiere described no species under that name, and Ferussac did not 

 even have the true undata Brug. in mind, his "undulata" being 

 probably an Oriental species. It would hardly be allowable to fol- 

 low a type through paths so devious, especially when the identifica- 

 tion rests upon the correction of two errors in Feru.«sac's work,, 

 on purely hypothetical grounds: first, that hy " undulata Brug.," 

 Ferussac meant " undata Brug. ; " and second, that by this name he 

 intended to indicate the species brought from Guam by Freycinet^ 

 and subsequently described by Quoy as Bulhea guamense. This 

 inference is based upon Ferussac's words, "deux tentacules dis- 

 tincts," his information being probably obtained from Freycinet's 

 specimens. It seems to roe that we can hardly agree with Martens 

 that B. guameusis, or with Fischer that B. undata is the type of 

 Bullina ; too many guesses being involved in either case. Ferussac 

 included also in Bullina, " B. amplustre," the type of the prior genus 



