382 THOS. H. MONTGOMEEY, 



distal cap of each tubercle bears a large number of densely-placed, 

 thick, white hairs, wliich are not attenuated at their distal ends but 

 are of equal diameter throughout; the most central of these hairs are 

 somewhat longer than the tubercle itself. These hairs are not stiff 

 in texture; they are densely grouped, covering the whole surface of 

 the distal cap of the tubercle, and the laterally-placed ones are 

 somewhat pendant, so as to partially cover over the apices of the 

 contiguous tubercles. 2) Tubercles which are grouped around each 

 pair of the preceding, there being from 20 to 30 in each group. On 

 surface views these also appear as dark rings, but they are of only 

 1/2 or V3 the diameter of the preceding kind. Those nearest the 

 centre of each group, i. e. those immediately adjacent to the central 

 pair of tubercles of the first order, are higher than the more peri- 

 pheral ones, and may be even of somewheat greater elevation than 

 the tubercles of the first order; but they are always more slender in 

 shape, and have a more or less pointed apex. The tubercles at the 

 periphery of each group are of still sraaller diameter, and are conical 

 or pyramidal in outline. Each tubercle bears upon its apex a number 

 of Short, fine hairs. 3) Tubercles, the shortest and most numerous 

 of all, of about the height of the lowest of those of the 2nd order. 

 These have usually a squarish or heraispherical form, though they vary 

 considerably in shape ; they do not bear hairs nor do they appear 

 like rings upon surface views. They are not arranged into groups, 

 but occur close together, filling out the Spaces between the groups of 

 tubercles of the 2nd order; their color is yellowish-brown. 4) The 

 last kind of prominences are delicate, club-shaped processes, which 

 occur only sparingly, and which attain the height of the medium- 

 sized tubercles of type 2; these are not seen upon surface views. 



When studied in alcohol before Clearing in oil, the cuticle has 

 quite a dififerent appearance from that just described. A system of 

 intersecting lines, which apparently have their position in the 

 fibrous cuticula of Vejdovsky (in: Z. wiss. Zool., 1886), are to be 

 Seen, between which lie rhomb-shaped Spaces. Each of the groups 

 of tubercles (formed of tubercles 1 and 2) appears merely as a high 

 eminence covered with snow- white hairs, the latter completely cover- 

 ing and obscuring the tubercles of the 2nd order which lie beneath 

 them. Between these white eminences are seen the tubercles of the 

 third order, though the hyaline, club-shaped processes are not seen 

 at all. But such alcoholic preparations show one kind of tubercle 

 which is ODly very faintly marked on cleared preparations: namely. 



