128 Notes on Macroceramus Kieiieri, etc. 



Extreme length, lialf an inch ; extreme diameter, 1 of an inch ; ordinary 

 size less. 



Pfeiffer, in Mon. Ill and IV, places C. pontifica, GlcL, in the 

 Syn. of his species. In Mon. VI and VIII, he, treating his spe- 

 cies as a Macroceramus, separates it from Gould's, assigning 

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



Binney and Bland, in Smith, Misc. Coll,, 1869, and W. G. 

 Binney, in Terr. Moll., V, 1878, following Pfeiffer's earlier 

 opinions, described 31. Kieneri as a United States species, with 

 Gould's species in its synonymy. 



Crosse and Fischer (Moll. Terr. Mex., p. 423, 1873) treated 

 M. pontifictis, Gould, — as I have shown Pfeiffer to have done 

 in his later works, — as distinct from 31. Kieneri, the latter from 

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

 Florida and the Florida Keys. 



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



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

 rata ; sutura impressa, crenulata ; anfr. 12 rotundati, costulis crebris, 

 obliquis, alternatim suturam praeteriuntibus ornati, ultimus subcarinatus ; 

 apertura lateralis, circularis, campanulata ; columella recta, nmbilicxim 

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

 diam. maj. 6 mill. Apertura 4 J mill, longa, 4^ lata. 



In some uncertainty as to the two sj^ecies, I wrote to my 

 friend Dr. Hy. Dohrn, the possessor of the late Dr. Pfeiffer's 

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

 cimen of 31. Kieneri. In the latter part of 1879, Dr. Dohrn 

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

 and one young specimen of 3i. 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 3f. Kieneri does not belong to 

 the fauna of the United States. 



