128 THE NAUTILUS. 



and at the same time does the trees good. On the whole, though, I 

 think the best plan is to plant bananas or plantains, which I am 

 doing, as they are the especially favorite food of tlie slug, and by 

 carefully searching the bananas, etc., great numbers can be found. 

 The people remember a plague of these slugs some twenty years 

 ago." 



Mr. Wynne has gone into the question of remedies so carefully 

 that there is little to add from the practical standpoint. It would 

 probably be a good plan to encircle the trees, near the ground, with 

 a thick ring of some obnoxious substance, such as coal tar or cart- 

 grease. This could be done quite cheaply, and the slugs would be 

 prevented from ascending the trees. , 



These slugs belong to a species called Veronicella sloanii. They 

 were first noticed by Sir Hans Sloane, and afterward named xloanii 

 by Cuvier. I have seen a specimen, collected by Sloane, preserved 

 in the British Museum. The typical form is white or whitish, but 

 Mr. Wynne's specimens constitute a variety, which may be called 

 Veronicella sloanii var. coffece. This variety is over three inches 

 long when adult, and about an inch and a quarter broad. Above 

 it is dark brown, obscurely mottled with darker, but beneath white, 

 more or less tinged with yellow. The foot or sole on which it walks 

 is very much narrower than the body. 



Institutex)f Jamaica, Jany. 26th, 1893. 



NOTES ON THE HELICES OF THE BIOLOGIA CENTRALI AMERICANA. 



BY H. A. PILSBRY. 



[Continued from p. 117.] 



The new section, Praticolella, is proposed by von INIartens to 

 replace Praticola Str. & Fffr., preoccupied. H. griseola and H. 

 herlandieriana are united and both are well figured. The use of the 

 subgeneric name Lysino'e for the Aglaia and Odontura of previous 

 authors, is a needed reform and was adopted some years ago by the 

 writer. The Mexican species of Arionia, described a year ago by 

 R. E. C. Stearns, is not included. 



In his rehabilitation of the subgenus Oxychona, Dr. v. Martens 

 neglects to state that he follows the arrangement originated by the 

 writer three years ago, and discussed at length in the Manual of 

 Conchology (2), Y, p. 128. 



