O THE NAUTILUS. 



Pnpidce in his possession. Among them there are a number of very 



interesting forms and varieties, as well as some species new to our 



fauna. 



Pupa califomica, Rowell.^ 



From Mr. Hemjihill's material we learn that this species is va- 

 riable to a very exceptional degree, so that the extreme forms 

 appear to be, or to belong to, quite different species, or even genera. 

 And it is more than probable that new specimens from other places 

 will bring to light still more forms. The lots under consideration 

 are the following : 



1. From San Francisco. Several hundred examples of the well 

 known form everywhere in collections. It may be regarded as 

 typical, yet is somewhat variable in itself, as to shape of the shell 

 and number and size of the lamelhe ; many specimens are more or 

 less oblong or obovate, while the majority are rather cylindrical ; in 

 some," the superior palatal lamella is very small and in a few even 

 entirely wanting, Avhile the apertural, columellar and inferior palatal 

 seem to be constant, the first and last of them generally well formed, 

 while the columellar may be small. In one specimen I saw a tiny 

 but distinct supra-apertural, and in very many there is a small, 

 nodule-like supra-apertural, close to the middle of the (outer side of 

 the) apertural. So far I had thought this latter to be a special, dis- 

 tinguishing character of P. rowelli, Newc. 



2. From San Clemente Isl. A little smaller and generally more 

 cylindrical than the type ; a part are even long cylindrical, having 

 the appearance of an Idhmia. The coloration is somewhat paler, 

 and the lamellae are well formed — elongata. Among the more 

 than 100 specimens there were 5 different from the balance, and 

 ranging with the following form. 



3. From Santa Catalina Isl. All the examples (about 200) are 

 of quite a peculiar form: small, rather short, pale horn colored; 

 shell thin, delicate ; rib-like striae less numerous and relatively 

 larger; the whorls are less high, which gives the shell a different ap- 

 pearance. All lamelhe are present and well formed, especially the 

 ajiertural. The shell is nearly exactly of the size and shape of 



1 Althoui^h I had ranged tliib species, with corpulenta, etc., among Vertigo, 

 I prefer here leaving it once in the old place, on account of the varieties being so 

 different from what we consider to be 'true Ver/ii^o. 



