594 



PROCEEDINGS OF THE ACADEMY OF 

 BUCCINID^. 



[Aug., 



Another series of species, formerly placed in Triton, proves to belong 

 to the Pisama-Tritonidea group of Buccimdcv; and for them a new sub- 

 genus of Triton idea may he erected. 



CADUCIFER Dall. 



The shell in this group resembles that of Tritonidca in sculptiu-o 

 and characters of the aperture, but it is more slender than in that 

 genus. The teeth resemble those of Euthria Hneata as figured by 

 Troschel. The teeth of the central row have a group of three cusps 

 springing from a short, arcuate basal-plate. The laterals have large 

 curved cusps at the outer and inner margins, with a smaller intermedi- 

 ate cusp near the inner one. 



Type T. fruncata (ffinds). 



iMg. 4. — T. decapitata (Jive.), Mau- 

 ritius (58,058, A. N. S. P.). 



Fig. 5. — T. parva C. B. Ad., Port 

 Antonio, Jamaica (62,041, A. N. S. P.). 



This group comprises the following species: 



^-Tritonidca {Caducijcr) dccapitdta (Rve.). Triton dcnipitdlns ]\v(>., 



Condi,. Iron., II, Triton, PI. 18, fig. 85. 

 Tritonidca {Caducijcr) cylindrica (Pse.). Triton c, Pease, Anicr. 



Jour. Conch., IV, p. 94, PI. 11, fig. 9. 

 ^'Tritonidca {Caducijcr) truncata (Hinds). I'riton trnucatinn. liiiids, 



Zoot. ''Sulphur;' p. 11, PL 4, figs. 9, 10. 

 TrUonidca {Caducijcr) cxirnia (Rve.). Triton cxiniius Ivac, Condi. 



/ro//., II, PI. 18, fig. 77. 

 '^•Tritonidca {Caducijer) jmrra, ((_'. P>. Ad.). Triton /Kirrus ('. B. 



Adams, Contrib. to Conch.., No. 4, j). 59. 

 Tritonidca {Caducijcr) parva intricata (Dall). /V/o.s jxirrus vav. iutri- 



catus Dall, Trans. Wagner hist., Ill, }). lol. 



The dentition has been examined in the three species marked with 

 an asterisk, the third species being the type. The other forms men- 

 tinned liMve been :iddpd frdin tiieir dose cojichnlotrjc; resemblanr^e t*^) 



