THE NAUTILUS. 11 



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

 Eulima, several Odostomia and Ccecum. In dealing with the Ter- 

 hnniUidce, the groups Mumiola and Mormvla (Adams, 18C4) are sub- 

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

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

 ils operculum said to have few whorls. 



In the second [ aper, Prof. Ytrrill records Aptysia dactylomela, 

 A. Wiiicoxi (?) and A. meyaptera n. pp. 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 Dorididce are 

 described. 



Transactions of the Wagner Free Institute of Science, 

 III, Contributions to the Tertiary Fauna of Florida. — We 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: 



" 1 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 Rochefortia. 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 



