ACARINA FROM THE JUAN FERNANDEZ ISLANDS 587 
concealed in the acetabula; femur I and II clubshaped, with thin proximal 
peduncle, and ventrally and distally a thin short triangular blade; femur II 
ventrally with a sharp tooth exactly where the joint widens. Femur | with 
two ventral hairs curved forwards in the proximal half, one straight external 
hair and two dorsal hairs near the middle. Femur II with the same number 
and position of the hairs. 
Trochanter III and IV large, curved outwards and downwards. Femur 
III and IV long and slender, only slightly clavate with distal blades ventrally 
as in femora I and II, and with one ventral hair behind the middle and one 
dorsal hair near the distal end in femur III and one a little in front of the 
middle in femur IV. 
Genu I—IV very small, not longer than they are wide, each with 2—3 
long tactile hairs. 
Tibia I—II long, with very slender proximal half widening towards the 
end, where there is one dorsal projection carrying a very long tactile hair. 
Tibia III—IV still longer and more slender, less swollen at the end and slightly 
curved like an S. Tibiz I and II with about 6 long tactile hairs in the distal 
third, tibia III and IV with 3—4 similar hairs. 
Tarsi I—IV short, with bases as wide as the top of the tibiz and 
apparently only little articulated against them, tapering towards the end and 
provided with 10—12 long tactile hairs. Claws monodactyle, large and strongly 
curved. Tarsi III and IV with 3 stout spines, two flanking the base of the 
claw and one smaller dorsal one. 
Loc.: Juan Fernandez, Masatierra. Among dry leaves. g. 8. 1917, 
no. 755. 
10. Odontocepheus sexdentatus n. sp. — Fig. 62. 
Amongst dry leaves collected in small bags for the purpose of investig- 
ating the molluscs and afterwards kept at the Museum of Natural History of 
Stockholm a species of this genus was found. Its legs were broken off but in 
other respects it was well preserved and, moreover, so characteristic, that it 
can be described. 
Length 890 .; width of hysterosoma 420 y.; length of propodosoma 600 ys; 
width of propodosoma 280 uw.. 
Colour light brown. 
Texture finely punctured. 
Propodosoma (fig. 62) of the same general shape as in O. longzpilus 
(compare fig. 60). The lamellz are very low, narrow bands of slightly darker 
chitin, of even width throughout and diverging slightly in the proximal */3 and 
then slightly converging. In front of them the cuticle has numerous transversal 
winkles connecting the tops of the lamella exactly as in O. longipilus. The 
lamellar and rostral hairs are placed as in QO. /ongipilus and of the same shape 
but the rostral hairs are twice as big as the lamellar hairs. Lamellar hairs 
straight, inserted on a level with the pseudostigmata, close to the inner margin 
of the lamellz. 
