54 JAPANKSE MOLLUSK8, STROMBIDiE. 



S. " guttatus Martini," of authors (=Pugil flavescens, albo, gut- 

 tatus, IcEvis Martini, Conch. Cab., II, p. 87, f. 840). 



Japan (Dkr.). 



As Linnaeus included both the rough and snaooth forms in his 

 citations and cabinet under the name cmris-dianae, it is evident that 

 the present form must bear the name given by Perry, who first of 

 binomial authors distinguished it. The well-known rough form 

 with smooth mouth retaining Linnreus' term, of which S. striatogran- 

 osiis Morch is a synonym. If the striation of the posterior sinus of 

 the aperture proves racially constant, this form (C. Icon., f. 36 b; 

 Thes., f. 98, 99) may be called var. lamarckii Gray. The other 

 variety, melanostomus Swains., is generally recognized (C. Icon., f. 

 37). 



Strombus aratrum Martyn. 



Alata aratrum Martyn, Univ. Conch., pi. 1 (1789). 



Strombus auris Dianae Zelandiae Novae, etc., Chemn., C. Cab., X^ 

 p. 210, pi, 150, f. 1485, 1486. 



S. auris dianae var. Gmel., Dillw. 



S. chemnitzii Pfr. Krit. Reg. zu Mart. u. Chem., pp. viii, 96 (1840). 



Strombus acutus Perry, Conchol., pi. 12, f. 2 (1811). 



Strombus pacificus Swains, Exot. Conch., pi. 17. 



Strombus " novwzelandicB Chemn.," Rve., C. Icon., f. 35. 



Bay of Yedo (Lischke). 



The above names are absolute synonyms of S. aratrum. S. aus- 

 tralis has been considered a variety of the above species by Tryon,. 

 but in the absence of intermediate forms may well be retained dis- 

 tinct, being distinguished by the characters recited below. It has 

 not been reported from Japan. 



S. australis Sowb., Thes., I, p. 36, pi. 9, f. 96, 97 (1847). 



Coronal tubercles on body-whorl small and numerous, several 

 strong median cords on body-whorl, and spiral sculpture much 

 stronger throughout ; columellar callus more colored ; basal and 

 upper wing processes bhick-tipped, and lip black-edged when fully 

 adult; posterior sinus of aperture with two stronger cords. 



Strombus succinctus L. var. robustus Sowb. Sowb., P. Z. S., 1874, p. 599. pi. 72, 

 f. 5, .5a. 



Hong-Kong (Cuthill ; Sowb.) ; Japan (Stearns) ; Tatiyama, Oki- 

 noShima (Ad.). 



