137 



ulus H. & A. ADAMS, Gen. Rec. Moll., ii, p. 5, 1858. Not of Plan- 

 ens. Tornatella of authors. 



Shell ovate or oblong, solid, compact and imperforat?, with short, 

 conical spire. Aperture two-thirds as long as the shell or more, 

 narrow above, rounded below, the columella bearing a massive bir 

 lobcd spiral fold, outwardly curving into the lower margin of the 

 peristome ; parietal wall bearing one or more smaller folds. Oper- 

 culum (pi. 49, figs. 17, 18) "transverse, elongated, curved, with im- 

 bricate elements and a linear scar." Type S. solidula L. 



Anatomy and dentition unknown. This genus differs from 

 Actceon by its more solid shell, and massive, bilobed, columellar 

 fold. The species are all from subtropical and southern temperate 

 Indo-Pacific seas; a few species extending northward to Japan, and 

 others south to South Australia and New Zealand. The Americas 

 have as yet furnished no species. 



This group has usually borne the name Buccinulus, introduced 

 into binomial literature by the Adams' brothers. Plancus, in his 

 original publication " Jani Planci Ariminensis de Conchis minus 

 notis, etc.," (Venice, 1739), gives the phrase-name " Buccinulus Lit- 

 toris Ariminensis Olivce Nucleum cemulans" to what is prob- 

 ably a discolored Actceon tornatilis, for no other shell of that 

 aspect is found in the Adriatic, and at all events it is a form with 

 absolutely simple columellar fold. In the second edition (Rome, 

 1760) it is called " Buccinum medium maculis fusds etflavis donatum 

 ex littore Ariminensi" but in the explanation of plates he repeats 

 the earlier comparison with an olive stone. Of course the "Buccin- 

 ulus" is not used in a generic sense. Schumacher's name Dactylus 

 had previously been used by both Klein and Humphrey, but not in 

 an acceptable manner. 



S. STRIGOSA Gould. PL 20A, figs. 60, 61. 



Shell ellipsoidal, elongated, rather solid, grooved by revolving 

 punctured sulci, the interspaces chain-patterned with brown and 

 whitish, and ornamented with median, sutural and basal bands of 

 whitish. Whorls 5, the last three-fourths the length of the shell. 

 Aperture two-thirds the length of the shell, very narrow ; columella 

 deeply excavated. Alt. 8, diam. 3 mill. (Gld.) 



Loo Choo and Kagosima (Stimp.) ; Nagasaki (Birileft) ; Tokyo 

 Harbor (Fr. Stearns). 



