^'%Y''] PROCEEDINGS OF THE NATIONAL MUSEUM. 395 



Lower Califoruia, in the uoitb. Tlie name cervinetta Kien, lias ([iiite 

 generally been applied to the west eoast shells, and it may be well for 

 geographical reasons to so label them or as " C. exanthema var.= C. cer- 

 vinetta Kien.," as above. They are one of the " pairs of analogues which 

 inhabit both sides of the isthmus," of Darien, or Panama, as it is more 

 commonly called. While the individuals of the two coasts are easily 

 separable, there can be no doubt as to their ancestry. (J. cervus, the 

 habitat of which has been a matter of doubt, and therefore of discus- 

 sion, is undoubtedly an east coast form, and nuiy be regarded as a 

 variety of exanthema. It is much more ventricose in proportion to its 

 length, and as a rule, the spots are closer and more numerous than in 

 exanthema proper. I have received first and last a great number of indi- 

 viduals of var. cervinetta, and have critically examined many more 

 belonging to various persons, but have never met with the cervus form 

 from the west side. The National Museum contains characteristic ex- 

 amples of cervus from Vera Cruz, collected by Dr. Strebel, in 1666. 



Snbgeuus LTJPONIAGray. 

 72. Cypraea (Luponia) nigropunctata Gray. 



Common on the beaches. 



James, Hood, and Indefatigable islands (Mus. No. 102375). For the 

 most part in poor condition. The Galapagos Islands are ai)parently 

 the specific center or metropolis of this form. Dr. Jones solitary exam- 

 ple from Manta, Ecuador, confirms the ])revious somewhat doubtful 

 report of its occurrence on the coast of the mainland. 



73. Cypraea (Luponia) albuginosa Mawe. 



Beach shells. 



James Island, one example. Previously credited to the Galapagos 

 in Wimmer's list. 



Gonus TRIVIA Gray. 

 74. Trivia Pacifica (hay. 



Beach shells. 



Hood Island, four beach shells but fresh and in good condition 

 (Mus. No. 10230L>). 



Family CEllITHIOPSID^. 



Gtima CERITHIOPSIS F. & H.. 

 75. Cerithiopsis neglecta C. B. Adauis. 



Beach shells. 



Indefatigable Island, two examples (Mus. No. 122128). 



