THE NAUTILUS. 
129 
Length 8, breadth 6 mm.; larger, “ curled ” examples would 
measure at least 10 mm. long. Divergence the same as in I. smnr- 
agdinus. 
Eagle Hawk Neck, east coast of Tasmania. Collected by Mr. W. 
L. May, and communicated to me by Henry Suter. 
This species belongs to the group of smoothish Australian species, 
such as lentiginosus Sowb., smaragdinus Angas and virgatus Reeve. 
It has more distinctly differentiated lateral areas and better de¬ 
veloped pleural sculpture than any of them, and is, moreover, of a 
uniform black color. Types in coll. Acad. Nat. Sci., Phila. 
In this connection it may not be out of place to direct attention 
to certain errors in the volume on Chitons in the Manual of Conch- 
ology. By the study of many specimens received from Messrs Bed- 
nall and Cox, I find that two species were “lumped” under the 
name Ischnochiton contractus. (1) I. decussatus Reeve, of which 
castas Rve. and speciosus Ad. and Aug. are synonyms, and (2) con¬ 
tractus Reeve, of which Mr. Sykes considers pallidas Reeve a syno¬ 
nym. On account of the inadequate illustration and description of 
Reeve’s C.crispus , I did not recognize it in my Isch. haddoni; hut 
upon sending specimens of the latter to Mr. E. R. Sykes for com¬ 
parison with Reeve’s type, he informs me that they are the same. 
While something might be said in favor of ignoring Reeve’s name 
on the score of insufficient definition, it may, in the long run, be 
better to receive it and make my own I. liaddoni a synonym of I. 
crispus. I regret the change, because my intention was to honor 
Prof. Haddon, whose work on Chitons, as well as in other depart¬ 
ments of Zoology, is of great merit; and a synonym is rather a 
doubtful honor. 
NEW SPECIES OF LAND SHELLS FROM PUGET SOUND. 
BY WM. H. DALL. 
In some minute shells sent for examination by Mr. P. B. Ran¬ 
dolph, of Seattle, after eliminating species already known, two forms 
appeared to be inedited. Having sent them to Mr. Pilsbry for 
criticism, he agrees that they are new, and the following descrip¬ 
tions are submitted. 
