HORSLKY : PRESIOENTIAI, ADDRESS. 49 



turned the wrong way, i.e., sinistral. It has a var. simplex^ i.e., 

 without denticle. 



In the genus C/aiisilia, Marpessa is a faithful matron mentioned in 

 -Homer. Pirosioma is formed from the Latin for pear and the Greek 

 for mouth ; laniinata is so named from having three or four laminse or 

 plates, visible through the shell. Biplicata is named from having two 

 folds. The var. nelsoni was named by Jeffreys in honour of Nelson, 

 one of the founders of our Society. Bidentaia, i.e., with two teeth. 

 Var. cravenensis, first described from Craven in Yorkshire. Var. 

 everetti, named by Miller after an English conchologist, who travelled 

 in Borneo and the east generally. P. rolp/iii, named i)y Gray after 

 Rolph, a contemporary English conchologist. 



The SucciiieidcE are represented only by Sucd/iea, i.e., amber- 

 coloured, from sucdmtt/i, amber. S. ptitris, i.e., stinking, is a 

 somewhat libellous term given it by I.inne. Var. stagimlis, i.e., 

 inhabiting marshes. Var. solidiila, i.e., somewhat solid, or thicker in 

 shell. S. eiegafis, elegant in form. Var. longiscata, i.e., lengthened, 

 from a late Latin inceptive verb longisco, to become long. Var. 

 pfeifferi^ named after Pfeiffer, the great German conchologist. Var. 

 ochrocea, i.e., yellow. Not a pure Latin word, but formed from ochra, 

 our ochre. S. oblotiga, having a longer spire in proportion to its size. 

 Var. arenaria, named by Bouchard from being often found on sand- 

 hills near the sea. 



We come now to the Basomniaiophora, which have the organ of 

 vision at the base of the tentacles. 



The first family is that of the Aurici/lidce, so named from the mouth 

 being more or less ear-shaped. The genus Carychium Gray and 

 Turton call the minute sedge shell, as if the name was derived from 

 Carex, sedge, which can hardly be, as the 'y ' suggests a Greek origin. 

 Jeffreys says it is named " from its resemblance to a Murex or kind of 

 whelk" — which is vague. Dupuy gives three Greek words as its 

 possible origin, none of them applicable according to sense, and all 

 of them inapplicable as beginning with a x and not a k, and so the 

 word would be Chaiychium and not Carychiuvi. Its specific name 

 .is minimum^ i.e., smallest. The genus Phytia is, probably the Greek 

 cj!)VTios, meaning generative. Ph. myosotis was named from its mouth 

 being like a mouse's ear. Ovatella may mean the small egg-shaped 

 shell. 



The next family is LimiueidcE, i.e., living in stagnant water, from 

 the Greek Xifivi], a lake, although by no means unknown in rivers. 



The first of its genera is Ancylus, from its recurved form at the 

 apex — the Greek dyKuAos, hooked. Pluviatiiis, i.e., inhabiting rivers, 

 rarely in still water. Var. capjiloides, a mongrel word for like a 



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