280 PROCEEDINGS OF THE NATIONAL MUSEUM. VOL. 37. 
SYNONYMOUS NAMES. 
The student of the preceding list, familiar with the names contained 
in Orbigny’s *‘ Voyage,” will miss a number of names which he 
would naturally have expected to find. It would have broken up the 
unity and conciseness of the faunal list to have it include any synonymy 
not necessary to the references given, i. e., the name used at the time 
of the description of the species and that used in connevtion with one 
or more good figures of the species. In order that the student may 
be able to identify synonyms with the name adopted in the list, an al- 
phabetical summary of the chief synonyms is here given. The sum- 
mary does not claim to contain all synonyms, for the work of bring- 
ing them together would have amounted to a monograph of the Peru- 
vian provincial mollusk fauna, for which at present time could not be 
spared. Nor is the accuracy of thissummary more exact than it could 
be made during the search of the literature and the comparison of the 
species in the collection of the U.S. National Museum. A thorough 
and complete study of the fauna would doubtless reveal the necessity 
for a certain number of changes. The present summary may be re- 
garded as a step toward a future monograph. I have profited much 
in preparing it by the data given in Tryon’s Manual, especially the 
volumes due to Dr. H. A. Pilsbry, without invariably accepting the 
decisions in that work. The works cited in the bibliography preced- 
ing the Faunal List have been carefully examined, together with many 
others which will be found cited in the List, and it is believed that 
nearly all the conspicuous synonyms will be found in the following 
summary. In adopting generic names the International Code of Rules 
for Zoological Nomenclature has been rigidly adhered to, and, while 
it would be too much to expect that absolute accuracy has been at- 
tained, the author has done his best in that direction. Hight hundred 
and sixty-nine species are cited in the Faunal List, and for the whole 
about 650 synonyms have been noted. This would indicate that the 
nomenclature is in a tolerably satisfactory state. 
SUMMARY OF THE CHIEF SYNONYMS. 
Acmaea cymbula Hupé=Scurria scurra Lesson. 
Acmaea nisoria Philippi=A. viridula Lamarck. 
Acmaea plana Philippi, not Reeve=<A. viridula Lamarck. 
Acmaea pretret Orbigny =A. viridula Lamarck. 
Acmaea punctatissima Philippi=Scurria parasitica Orbigny. 
Acmaea spectrum Wimmer= A. variabilis Sowerby. 
Aeolis auctorum, cf. Aeolidia Cuvier. 
Amalthea Schumacher, not Amaliheus Montfort=Hipponix Defrance. 
Amphidesma croceum Gould =Semele solida Gray. 
Amphidesma orbiculare Hupé=Semele solida Gray. 
Amyxa Troschel= Prisogaster Morch. 
Anomia electus Gray =A. peruviana Orbigny. 
