124 THE NAUTILUS. 
the request of Mr. Hedley, when we worked out our “ Reference 
List,” I tried to solve the question. I came to the conclusion that 
Th. portia Gray must be the same species, and therefore they appear 
as synonyms in our list. I then selected two perfectly similar speci- 
mens, and sent one to Mr. Edg. A. Smith of the Brit. Museum for 
comparing it with Gray’s type of H. portia, the other to Dr. Dall, 
Washington, to compare it with Gould’s type of H. ziczac. Both 
gentlemen very kindly acceded to my request, and I herewith wish 
to express my gratitude to them. 
Mr. Edg. A. Smith writes: “Helix portia Gray. Right, but I 
doubt if Gould’s ziczac is the same species.” And Dr. Dall reports: 
“There is no doubt whatever of the identity of your shell with 
Gould’s type. He, in his preliminary report (Otia Conch., p. 17), 
refers it to New South Wales, but in his final report (Moll. U.S. 
Expl. Exp., p. 41), he says that it was collected by Dr. Pickering 
in a crater at Taiamea, New Zealand. His type was a little faded, 
hence the prominence of the dark variable lines and the straw color 
of the shell.” These reports set all doubts at rest. 
4. Thalassohelix zelandie Gray. In a letter to me, Mr. H. A. 
Pilsbry expressed his opinion that the shell Prof. Hutton and I con- 
sidered to be Gray’s Hel. zelandie might, perhaps, be another spe- 
cies. I therefore forwarded a specimen to Mr. Edg. A. Smith, and 
he kindly compared it with Gray’s types. His opinion is as fol- 
lows: ‘“ The shell under this name is, I think, a form of that species. 
It is larger than any of our typical examples and more brightly 
variegated, and the whorls are perhaps, a trifle flatter, still I think 
it is only a variety.” To this I would remark that most species of 
Thalassoheliz are subject to great variation, and I am confident that 
we identify the right shell as Th. zelandie Gray. 
5. Endodonta varicosa Pfeiffer, I considered to be synonymous 
witb E. timandra Hutton (Reference List, l. ¢., p. 651). Mr. H. A. 
Pilsbry, however, denies their identity (Man. Conch. (2) VIII, p. 
84), and I therefore also sent specimens of E. timandra to Mr. Edg. 
A. Smith for comparing them with varicosa Pfr. He kindly sent me 
the following information: “ E. timandra Hutt. This is distinct 
from varicosa Pf. It is smaller, more openly umbilicated, has more 
riblets, and the armature of the mouth is different. There are three 
teeth in timandra and one (overlooked by Pfeiffer and Reeve) in 
varicosa, situated on the body-whorl. It is a very slender lamella, 
and might easily be overlooked.” After receiving this report, I 
