OP CONCHOLOGY. ITT 



U. hullatus, (pi. 12, fig. 43.) — A very poor specimen of tliis 

 beautifal species tias been figured. 



IT. pernodosus (pi. 12, fig. 46) does 7iot inliabit "Nortli Caro- 

 lina," that we are aware of. Why has Mr. Eeeve so hurried 

 his descriptions as to forget, in most cases, to assign better lo- 

 calities than " North America" as the habitat.^ The localities 

 were easily obtainable from the works he quotes as authorities, 

 and he seems, by the omission, to be ignorant of the fact that 

 there are distinct geographical groups of species of Unio in 

 the United States. 



U. Rangianus (pi. 14, fig. 54) we consider a pretty good 

 TI. sulcatns. U. interruptus^ {h-evidens, Lea,) Arcseformis, and 

 Sowerhyanus^ all figured on this plate, are remarkably poor. 



IT. deviatns (pi. 15, fig. 61) and U. sacculus (pi. 15, fig. 67) 

 are the same as those herein described. Mr. Reeve's descrip- 

 tions are from specimens in Cuming's collection, sent by Mr. 

 Anthony, with MS. name attached. 



U. perdlx^ Con., (pi. 18, fig. 82.) — The figure would never 

 be taken for that species. 



We trust that future numbers of Mr. Reeve's beautiful 

 work will exhibit some improvement upon the ones now be- 

 fore us. The descriptions are not very good, but would answer 

 with good figures ; but the latter, so far as published, have an 

 unreal look, are stiff) exaggerated in detail, and very unsatis- 

 factory. We consider this work, by no means, equal to the 

 other European monographs of Unio. 



Annals and Magazine of Natural History, No. 83. Nov., 1864. 



Remarks on Stilifer, a genus of quasiparasttic Mollusks, 

 ivith particulars of the European species S. Turtoni: BY 



J. GWYX JEFFREYS. 



Much information is given concerning the animal of this 

 curious little shell, including details of habits, &c., and a full 

 conchological history. Twenty-four species of Stilifer are 

 enumerated. 



No. 84, December, 1864. 



Diagnoses of new forms of Mollusca from the Yancouver 

 District: BY P. P. CARPEXTEE. 



MiBra salmonea. Gihhula lacunata. 

 Angulus variegatus. " funiculata. 



Miodon, (n. g.) Eipponyx cranioides, 



M. prolongatus. Bivonia compacta. 



Adula stylina. Lacuna porrecta. 

 Axinsea suhohsoleta. " compacta. 



Siphonaria T/tersites. " variegata. 



