BY C. HEDLEY. 273 



In the British Museum, I found two unnamed Strigilla labelled 

 "Moreton Bay, Mr. Strange." I had no specimen of the species 

 for actual comparison, but, by recollection and by the published 

 drawing, I recognised the Moreton Bay shells as my S. grossiana. 

 With the shells of Strange, Mr. E. A. Smith and I agreed to iden- 

 tify the type of Hanley's Strigilla sincera, described from an 

 unknown locality 



Prof. C. B. Adams* reported that he personally procured S. 

 sincera at Panama. Afterwards Carpenter f noted that while he 

 considered S. sincera identical with S. disjuncta, H. Cuming re- 

 garded these two as "quite distinct." This contradiction agrees 

 with the hypothesis that the Panama record by Adams and Car- 

 penter was based on disjuncta, not on sincera. In various collec- 

 tions in the United States, I saw specimens, from Central America, 

 of S. disjuncta, but none of S. sincera. 



Confusion of names or localities has occurred in the literature of 

 S. sincera, for it is incredible that it exists both at Panama and 

 Moreton Bay. It seems to me probable that the American records 

 are erroneous. 



Semele ada Adams and Angas. 

 (Plate xvii., figs. 29, 30, 31, 32, 33.) 

 Semele ada A. Adams and Angas, Proc. Zool. Soc, 1863, p. 426; 

 Id., Tate, Trans. Roy. Soc. S.A., ix., 1887, p. 85, PI. v., fig. 8. 



I have derived a figure from a specimen in the British Museum, 

 marked type, which is 12 mm. long, and 10 mm. high. 



Semele duplicata Sowerby. 



Semele duplicata Sowerby, Spec. Conchyl., 1830, fig. 14, 15 ; Id., 

 Melvill and Standen, Journ. Linn. Soc. Zool., xxvii., 1899, p. 201. 



Amphidesma zebuense Hanley, Proc. Zool. Soc, 1844, p. 17. 



In the British Museum, "Antigua," the original locality, is 

 crossed out, and "Torres Straits," perhaps on the record by Mel- 

 vill and Standen, is substituted. The name of this species does not 



* Adams, Ann. Lyceum Nat. Hist. New York, v., 1852, p. 285. 

 t Carpenter, Kept. Brit. Assoc. 1863, p.554. 



