THE NAUTILUS. 11 



them being described as new, among them a new Siphonaria, 6 

 Eulimcti several Odostomia and Ccecvm. In dealing with the Ter- 

 bonittidce, the groups Mnmlola and ]\ formula (Adams, 1804) are sub- 

 ordinated to Pyrgostelis (Monterosato, 1884), though Adams' names 

 have priority. The dentition of Syiictptocochlea picta is figured, and 

 its operculum said to have few whorls. 



In the second ] aper, Prof. "VYrrill records Aplysia dactylontela, 

 A. Willcoxi (?) and A. meyctptertt n. sp. The latter is a fine species 

 a foot long. Pleurobranchopsis is a new genus for P. aurantiaca n. 

 sp., a form with no shell, mantle-edge free throughout, gill sessile ; 

 the radula and jaws are not described. C species of DorididtE are 

 described. 



TRANSACTIONS OF THE WAGNER FREE INSTITUTE OF SCIENCE, 

 III, Contributions to the Tertiary Fauna of Florida. "\Ve have more 

 than once in these pages alluded to the importance of this publication 

 to the general student of recent mollusks, no less than to the paleon- 

 tologist. The production of such a work is evidence of an enlight- 

 ened appreciation of the value of these investigations, on the part of 

 the Trustees of the Wagner Institute, no less than a high ideal of 

 scientific work on the part of the author, Professor Wm. H. Dall. 

 The esteem in which the Transactions are held by foreign students 

 is shown by a recent letter from the Australian conchologist, Charles 

 Hedley, an extract from which we venture to print: 



" I am most gratified at receiving the volume on the Tertiary Mol- 

 lusca of Florida, but in thanking you for the copy I must also thank 

 you for the labor you have placed at the disposal of every student. 

 I cannot sufficiently express what a boon to me is the generic revision 

 of the various groups. After struggling with the scanty and perplex- 

 ing literature of bivalve hinge structure, I can greet your work as a 

 ship-wrecked mariner might greet the shore. For instance, I have 

 had a quiet little fight with Mysella and have drawn the hinges ready 

 for publication. But I had laid aside the notes and sketches till I 

 could better comprehend the matter. My unsuccessful struggles at 

 least enabled me to appreciate the cost of labor and talent in produc- 

 ing the synonymy of Rocliefortiii. Those who have daily intercourse 

 with fellow workers, who can consult great museums and splendid 

 libraries, will thank you in their turn. But as a scientific exile, 

 without these advantages, allow me to tell you how your Mollusca 



