52 THE NAUTILUS. 



As Dr. Sterki stated the differential characters of liis variety while 

 my own was without a description, liis name for it will stand, my P. 

 Hand becoming a synonym, though several years earlier in date. 



The species is smaller than P. exacutus, the last whorl seen from 

 above less wide, the suture deeper and the apex a little more sunken. 

 Below, the umbilicus of P. rubeUus is very much wider and less deep, 

 and the last whorl is consecpuently far narrower than in exacutus, 

 and the aperture is smaller. As in exacutus, the form is biconvex 

 and the periphery acutely keeled, color reddish corneous. Alt. 1, 

 diam. 4^ mm., or somewhat smaller. 



The localities now known are as follows: Pennsylvania: Blairs- 

 ville, Indiana Co., in a small stagnant pond, adhering to the under 

 sides of dead leaves (E. H. Harn, March, 1889). Ohio : Tuscaroras 

 Co., near New Philadelphia. 



There is also a tray of 8 specimens in our collection without 

 locality record. 



The shells seem always to be covered with a ferruginous crust. I 

 repaid P. rubeUus as specifically distinct from P. exacutus, the char- 

 acters being quite constant in the series of some twenty-four speci- 

 mens examined. P. exacutus is a wide-ranging species, extending 

 from New England to New Mexico. 



COLLECTING ON THE GULF COAST OF FLORIDA. 



BY E. J. POST. 



The keys at the entrance to Tampa Bay, are perhaps one of the 

 most favorable collecting grounds on the gulf coast. The result of 

 a twelve days' trip in March is shown by the accompanying list, with 

 the number of specimens collected ; most of the collecting was done, 

 at Pass-a-Grille, Long Key, and the north end of Mullet Key. All 

 dredging was done with a small hand sieve at low tide. Haminea 

 succinea were very abundant in the drifts between Point Pinellas 

 and St. Petersburg. Melampus coffeus and M. coffeus var. gundlachi, 

 were collected on the south end of Long Key ; they were unusually 

 large and fine. There was an immense wash of Bittium varium 

 ashore, the second that has come under my observation in eight years 

 collecting. Helices were very abundant on Long Key. I collected 

 175 specimens under one thistle, 85 of which were Polygyra uvulifera, 



