754 THE MAMMOTH CAVE AND ITS INHABITANTS. 
allied to Gammarus, which lives in small pools of water and is 
white and blind; and the cave pill bug, Titanethes albus (Koch.).” 
In conclusion Schiödte remarks that : — 
“We may with ixan apply the collective term Subter- 
ranean Fauna to those animals which exclusively inhabit pete 
and are bresat eee iaire for such habitations. Still t 
is nothing in this name which would indicate that these apo 
have any claim to be considered as a separate group, beyond the 
mere peculiarity of their common place of abode. While a few 
of them possess such an extraordinary structure as to stand in no 
comparison with those animals which inhabit the light, there are 
others, forming only more characteristic links in the groups 0 
animals more or less shy of light, of which many are found common 
in the localities of the caves ; and some belong to genera having a 
wide local, as well as geographical, extension. rite are accordingly 
prevented from considering the entire phenomenon in any other 
light than something purely local, and the similarity which is ex- 
hibited in a few forms (An nophthalmus, Adelops, Bathyscia) be- 
tween the rink Cave and the caves in Carniola, otherwise 
than as a very plain expression of that analogy, which subsists 
Vort 
Besides, it is clear to me that the fauna of the caves of Carniola 
enS s of two divisions, of which the essential character is refer- 
able on the one hand to the dark locality, and on the other to the 
additional confinement to stalactitic formations ; as yet we are not 
ing to Bate and Westwood (British Sessile eyed Crustacea) *“ the British examples have 
ore Bs ea ani pengi artificially excavated wells connected with houses for Momnestic 
In some instances the wells have been old, in others but recently dug. In 
their geological ‘conditien the habitats hav ie hogy goer various. At Corsham the well 
exists in the ite formation, at Rin chalk-flint grayel, at Mannamead in 
slate. At pA ea and Mannamead they are re icuad on a hill, at Ringwood they lie low 
F ppearance of some of als in ode Pot after ing Nt mi 
the surrounding reami: in fact they perish in the light. Itis im i 
ossible to und in 
men asa variety, or ea A tion of our only fresh ring Amphipod, Gam- 
= adap hearths Sear ainoa various parts not only differ in form, but some are altered in char- 
e er; for example, the extraordinary elongation and slenderness of one of branches 
wards which was found by M. Ermann in the w ~ 
i M. pera K ngs 
orci this genus. It is curious that we should. have vibes ps the ‘Kamntechatka pesca 
f | ro nin = hha tig rive i dag hae inhabit the deep artificial wells, without 
= ees a thet treams, its nearest allied form is to be found 
5 iii Sen 
Phe ae TR rec! 
“gp Fg ee 8) 
