HORSLEY : PRESIDENTIAL ADDRESS. 19 



Alltaria, i.e., smelling of garlic, was so named by Mr. J. S. Miller, 

 of Bristol, in 1822. It has a var. viridula, i.e., greenish. 



Nitidula, i.e., somewhat glossy, has a var. nitens, i.e., shining, 

 though the differential character of the shell is not its lustre, but the 

 greater amplitude of the last whorl. The species pu7'a derives its 

 name from both the body and the shell being white. Its var. 

 nitidosa is of a clear fawn or horn colour. The word is unclassical 

 Latin for shining, and it is to be deprecated that in this small sub- 

 genus we should have nitidula, nitens, nitidosa, and nitidus, as 

 specific or varietal names, when the name of the sub genus — Polila — 

 indicates for all that they are polished or glossy. 



The species radiatida is named from the shell being finely radiate 

 in its striation. The var. viridescenti-alba, i.e., greenish-white, of 

 Jeffreys, may be but a sub-variety of var. viridula, first described by 

 Menke in 1830. 



The genus Zonitoides (" like Zonites ") contains nitidus and its 

 var. albina and excavatus, i.e., hollowed out, with a very wide 

 umbilicus. The genus Euconuliis means pretty little conical shell, 

 while fulvus is tawny. The name Mortoni was given to a variety by 

 Jeffreys, possibly in honour of the Rev. J. Morton, who wrote in 

 1712 on the natural history of Northamptonshire; and that of var. 

 Alderi by Gray in his 1840 edition of Turton's Manual after 

 Joshua Alder, the great Newcastle authority on the Nudibranchiata 

 or "sea-slugs.'' 



We come next to the family of ArionidcE. The Greek name Anon 

 is historically given to a certain musician and a certain swift steed — 

 neither of whom naturally suggest a slug. The ' i ' should be short 

 by-the-bye, and the accent on the first syllable. People have been 

 misled by recollections of the name Orion given to a constellation. 

 The species ater, i.e., black, was named Limax ater by Dr. Lister in 

 1674. It usually, in England, deserves its specific name, but is also 

 white, red, lead-coloured, chocolate, and parti-coloured. Of the ten 

 varietal names given in our catalogue (sixteen in Taylor's Monograph), 

 those not already translated or explained are flagella, concerning 

 which Mr. J. W. Taylor writes to me : " It was so named by Mr. 

 Collinge, from his belief that this type specimen possessed a 

 flagellum on the oviduct. I have pointed out the unlikelihood of 

 this, and Dr. Scharff who examined the type dissection, denies that the 

 so-called flagellum is anything but tissue;" lusitanica, i.e., found in 

 Portugal ; bicolor, two-coloured ; sivamtnerdami of Kalaleniczenko, 

 named after the German naturalist, whose Biblia Naturce was 

 published in 1737. The species i'///y?/i'^//.$' — somewhat brown. Var. 

 auraiitiara means golden-hued — aurata would be classical Latin. 

 The species elongatus - lengthened — not classical Latin, 



