HORSLEY : PRESIDENTIAL ADDRESS. 17 



marine shell Haliotis, the meaning of which again is the ear-shaped 

 sea shell. The third species scutulu?n derives its name from scutum 

 a shield, scutulum a little shield. 



The next family is that of the Limacid<^, in which the first genus is 

 Limax. This name was hardly " originated or instituted by Linn^," 

 as Mr. J. VV. Taylor says. It was the old Latin name for a slug, 

 derived from li?Hus, or mud. Thus Varro writes, limax a limo quod 

 ibi vivit, and Festus, lunaces cochlece a limo appellatcB, " slugs are 

 shells named from mud." The first species is juaxivms, i.e., the 

 greatest. The variety first named on our list is cinereo-niger. This 

 means ashy-black, but is one of those undesirable compound names 

 which remind us of nurserymen's Latin. The name was given by 

 Wolf in 1803, but its colour varies much — black, white, yellow, red, 

 grey, and brown. The var. ferussaci was named by Moquin-Tandon, 

 in compliment to Ferussac, another great French conchologist, 

 whose son continued his work. Var. krynickii, named after 

 Krynick, an authority on Russian non-marine shells. Var. fasciata 

 = banded. Var. ?naculata = spotted. Var. rufescens = reddish 

 entirely. Var. cellaria = found in cellars, though not so definitely 

 or exclusively as to warrant the name. Var. Candida = white. 

 This species — maxinius — belongs to the sub-genus Heynemannia, so 

 named after the great limacologist of Frankfort. 



Of Lehniamiia, the first species is flavus, i.e., yellow. Its var, 

 virescens means greenish ; but the coloured figure in Taylor's 

 Monograph hardly bears out the name. Var. suffusa, i.e., suffused, 

 the darker shade overspreading or suffusing, and so obliterating the 

 spots which are characteristic of the normal L. flavus. The vars. 

 rufescens and ??iaculata have already been interpreted, and only on 

 the first occurrence of a name will its meaning be given. The next 

 species is arborum, i.e., frequenting trees. Its var. nemorosa means 

 inhabiting groves. Var. rupicola = inhabiting rocks. Var. pallens 

 = pale, paler than the type. Var. alpestris = found in the Alps, or 

 high places. 



The genus Agrioliniax comes next. The name means field-slug. 

 Its first species is agrestis, inhabiting fields. Var. sylvatica = 

 found in woods. Var. punctata = spotted, with black. Var. 

 nigra = black. Var. lilacina, called by Mr. Taylor violacea. It 

 is lilac or slate-coloured rather than violet. Named violacea by 

 Gassies in 1849 \ t)ut Moquin-Tandon in 1855 more correctly called 

 it lilacina. Var. albida = whitish. Var. reticulata — marked like 

 network, or, as Mr. Taylor says, " with interstitial hneolation." 

 Var. tristis - sad, i.e., sad-coloured. Var. obscura = hidden. 



