7; ~-« ~~ ~ 
THE NAUTILUS. 13s 
looked all specimens of EF. timandra in my collection carefully 
through, and had the great satisfaction to find a few specimens of E. 
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 Ch. taw Pfeiffer (Ref. List., i. ¢., 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. Ihave 
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, 1885). 
Now it remains to identify Ch. taw Pfr. It may be that my 
Charopa mutabilis 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- 
dee and to Mr. A. A. Hinkley for the identification of Goniobasis 
