157 



exterior in latere exteriore incrassatus, post oblique trun- 



catiis vel ohsciire emarginatus. 

 Long. 30 m. m. 

 Color flavus, maculis perminutis, atris, rarissimis, in series 



transversas digestis sparsus. 



Specimen inter navigationem Tliayer in flumine U^a. Americre 

 meridionalis (Peru) captum (W. James, Mus. Cantabrig., Mass.) 

 examinavimus. 



