;i^28 Notes on Macroceramus Kieneri, etc. 



Extreme length, half an inch ; extreme diameter, 4 of an inch ; ordinary 

 size less. 



Pfeilfer, in Mou. Ill and IV, places 0. pontifica, GUI., in the 

 8yn. of his species. In Mon. VI and VIII, lie, treating his spe- 

 cies as a 31acroceramus, separates it from Gould's, assigning 

 Florida and Orizaba, Mexico, as the habitats of the latter. 



Binney and Bland, in Smith. Misc. Coll., 18G9, and ^\. G. 

 Binney,^in Terr. Moll., V, 18?8, following Pfeilfer's earher 

 opinions, described M. Kieneri as a United States species, with 

 Gould's species in its synonymy. 



Crosse and Fischer (Moll. Terr. Mex., ]). 423, 18:3) treated 

 J/, pontificus, Gould,— as I have shown Pfeitfer to have done 

 in his later works,— as distinct from M. Kieneri, the latter from 

 Honduras, and the former from Orizaba (Mexico), as well as 

 Florida and the Florida Keys. 



Crosse and Fischer (1. c.) describe M. pontificus as follows : 

 Testa ovato-fusiformis, superne attenuata, albida, griseo et fusco marmo- 

 rata ; sutura impressa, creniilata ; anfr. 13 rotundati, costulis crebris, 

 obliquis, alternatim suturam praeteriuntibus ornati, ultimiis subcarinatus ; 

 apcrtura lateralis, circularis, campanulata ; columella recta, iimbilicum 

 linearem tegens ; perist. reflexiusculum, albidmii. Longitude 18 mill., 

 diam. maj. 6 mill. Apertura 4A mill, longa, 4.} lata. 



In some uncertainty as to the two species, I wrote to my 

 friend Dr. Hy. Dohrn, the possessor of the late Dr. Pfeiffcrs 

 collection, asking if he conld furnish me with an authentic spe- 

 cimen of M. Kieneri. In the latter part of 1879, Dr. Dohrn 

 informed me, that in Pfeiffer's collection he found three adult 

 and one young specimen of M. Kieneri, and very kindly sent 

 to me one of the adults, 'which the foregoing figures represent, 

 the left hand figure being of the natural size. 



It is certain that the species M. Kieneri does not belong to 

 the fauna of the United States. 



