THE NAUTILUS. 87 



NOTE ON TWO SPECIES OF HELICINA. 



BY C. F. ANCEY. 



1. Helicina Rabei Pils., recently described in the NAUTILUS from 

 specimens collected by Dr. Rabe, must be the same as the previously 

 described H. rufocallosa Anc., based on the examples long ago dis- 

 tributed by Dr. J. D. E. Schmeltz, of the Museum Godeffroy, under 

 the erroneous name of H. Fischeriana 1 Montr, (which may be iden- 

 tical with " H. Picheriana " of Paetel's Catalogue). The species is 

 from Peleliu, Pelew Islands, and the color is very variable. The 

 type specimen is grayish with a red basal callosity, but I have, since 

 I published H. rufocallosa, procured other specimens having differ- 

 ent shades of coloring. 



2. Helicina Funcki Pfeiffer, originally described from New 

 Granada (Fuuck), is also found at Greytown, Nicaragua. It has 

 also been detected on Monkey Hill, near Colon, Isthmus of Pan- 

 ama, by Mr. Aillaud. The size of the two specimens collected in 

 the latter spot is different, one of them being considerably smaller 

 and tinged with pink-red on the last whorl. 



OXYCHONA UNMASKED. 



BY H. A. PILSBRY. 



Those who have interested themselves in South American land 

 shells will recall the group Oxychona of Morch, containing a few 

 acutely keeled, trochus-shaped Brazilian species, the best known of 

 which is Helix bifasciata Burrow. 



In Costa Rica and southern and eastern Mexico there are some 

 similar Helices which had been placed in Geotrochus, Corasia, etc., 

 but which the present writer in 1889 2 transferred to Oxychona. 

 This disposition also commended itself to von Martens, who in 

 1893, 2 adopts the same view. In my " Guide to the Study of Heli- 

 ces," 1894, no doubt was expressed regarding the alliance of the 



1 The true Fischeriana is a larger shell, allied to rufocallosa ( = JRabei) and 

 is probably confined to the islands near eastern New Guinea. 



2 Man. Conch. (2), v, p. 128. 



8 Biol. Centr. Americana, Moll., p. 152. 



'LI*ARY> ( 



