BY E. F. KALLMANN. 487 







known species, it is still further distinguished by having the 

 pores arranged in sieve-like groups (PI. xxvi., fig.5) — in which 

 respect it is approached only by T. reteporosus — a.nd by the 

 reduction of the microstrongyla in part to spheres. An adequate 

 idea of the external habit will be obtained by reference to the 

 figure (PI. xxi., fig.5) of the single complete example, which 

 measures 60 mm. in total height : in the case of the other speci- 

 men, the branches are somewhat longer, several of them attain- 

 ing a length of 25 mm. The colour in alcohol is a minutely 

 mottled, slightly brownish pale grey, and the consistency is firm, 

 fairly tough, compressible and resilient. 



The surface-pimples, — which coincide in position with, and to 

 some extent are the expression of, the points of impingement of 

 the skeletal fibres upon the dermal membrane, — are fairly 

 uniformly distributed over the whole surface at a distance apart 

 approximating to their own breadth, which on the average is 

 about 0-4 mm.; they are rounded or flattened above, not conule- 

 like, and are conspicuous not so much by the amount of their 

 projection — which at the most is but slight— as by their whitish 

 colour and more opaque appearance compared with the inter- 

 vening portions of the surface. At the locations of the small 

 areas formed by these elevations, the dermal membrane is closely 

 adherent and non-porous; but between them it overlies sub- 

 dermal spaces, and is so perforated by numerous small pore- 

 sieves as to appear minutely reticulate. The pore-sieves (PI. 

 xxvi., tig. 7; PI. xxvii., fig. 6), are oval to circular in outline and 

 generally between 40 and 120/a in distance apart, range from 

 less than 100 up to about 200/x in diameter, and contain each, 

 according to their size, from 2 to 8 pores of diameter varying 

 from 20 to 60//. 



Skeleton. — Except in the stalk and the lower portions of some 

 of the lower branches, the skeleton exhibits no well-marked axial 

 condensation or core, but is rather of the dendritic type (PI. 

 xxxix., fig.7) consisting chiefly of longitudinally-running and of 

 gradually outward-trending, continually branching main fibres, 

 which are not distinguishable as axial and radial respectively; 

 transverse or connecting fibres are numerous between the main 



