H. A. Pilsbry — Air-breathing Mollusks of the Bermudas. 503 



Family ONCHIDIID^. 



Onchidium floridanum Dall. 



O.floridanu7n Dall, Proc. U. S. Nat. Mus., 1885, p. 288. 



0. transatlanticum Heilprin, Proc. Acad. Nat. Sci., Phila., 1888, p. 327, pi. 16, f. 4, 4a. 



Originally described from Knight's Key, Florida, where Hemphill 

 collected it. Professor Heilprin found the types of 0. transatlan- 

 ticum, which seems to me to be completely synonymous with flori- 

 danum, "in a rock hollow on the north shore just beyond Wistowe, 

 near Flatts Village." 



It was very abundant at Bailey's Bay, near Mr. Seon's house, on 

 the rough eroded ledges, at and just below high-tide mark. Its 

 dark olive green color agrees so well with the stains on the rocks 

 that it is very inconspicuous. — (A, E. Y.) 



Family PHYSID-ffi. 

 Physa acuta Drap. 



Specimens of this common European species were collected by 

 Mr. G. Brown Goode, in a fresh-water tank, several years ago. All 

 the freshwater on the island is rain water storage, so the means by 

 which this species reached the tank is a mystery. I am indebted to 

 Prof. Dall for the opportunity of seeing this species. 



Water lilies and other aquatic plants have been cultivated in the 

 gardens (see Lefroy's List of Plants, Bull. Nat. Mus., xxv). It may 

 have been introduced with such plants, or with goldfish that are 

 now naturalized in the brackish ponds. — (A. E. V.) 



Family AURICULID^. 

 Pedipes mirabilis (Miihlf.). 



Typical specimens of all ages taken by Heilprin. It is readily 

 distinguished from the next species by the blunt tooth within the 

 outer lip of adults, with a ridge running parallel to the peristome 

 below it. Length 4-5' 



imm 



Pedipes tridens Pfr. 



Plate LXII, Figdre 10. 



Originally described from Bermuda, from Redfield's collection, 

 some of whose specimens are before me. Also collected by Profes- 



