THE NAUTILUS. 125 



looked all specimens of E. timandra in my collection carefully 

 through, and had the great satisfaction to find a few specimens of £". 

 varicosa Pf. The two species differ in the characters mentioned by 

 Edg. A. Smith ; however, I have one specimen of E. varicosa with 

 two lamellae in the body-whorl. If not very carefully examined, 

 the two species may very easily be confounded. It seems that E. 

 timandra occurs only on the North Island, while E. varicosa seems 

 to be limited to South Island. 



6. Charopa sylvia Hutton. I thought this species to be identical 

 "with Cli. tau Pfeiffer (Ref. List., 1. c, p. 657), but felt always more 

 or less doubtful. I therefore sent specimens with the others to Mr. 

 Edg. A. Smith, and he very kindly wrote to me : " Ch. sylvia Hutt. 

 You question this being the same as Hel. tau. Pfr. We have not yet 

 the latter in the Museum, but Pfeiffer's description of the sculpture 

 ' subdistantum costato-plicata ' scarcely applies to your specimens. 

 They are undoubtedly identical with Pieiffer's Hel. gamma. 1 have 

 compared them with the types, and they agree in every respect, ex- 

 cepting that yours are fresher." Therefore : 



Charopa buccinella Reeve, sp., 1852 (=gamma Pfeiffer, 1852 

 (? 1853) = sylvia Hutton, 1883). 



Now it remains to identify Gh. tan Pfr. It may be that my 

 Charopa vndabilis is this species ; I have sent a specimen to Vienna 

 to have it compared with Pfeiffer's type, and am awaiting a report. 



New Zealand, Christchurch, Sept. 6, 1893. 



SHELLS OF THE SAGINAW VALLEY, MICHIGAN. 



BY BRYANT WALKER, DETROIT, MICHIGAN. 



Some twenty-five years ago the late Dr. George A. Lathrop, 

 while residing at East Saginaw in this State, made a considerable 

 collection of the shells, which he found in that vicinity. 



After lying packed away for many years, the collection has recently 

 come into my possession, and as it contains some material of consider- 

 able interest, and no local catalogue from that part of the State has 

 ever been published, the following list of the species represented 

 has been deemed worthy of a permanent record. 



I am indebted to Dr. V. Sterki for the determination of the Pupi- 

 dse and to Mr. A. A. Hinkley for the identification of Goniobasis 



