KAEAKOEAM STONES, OE SYEINGOSPHiEEIDA]. 
11 
masses of tubes mnning over it, converging on the eminences, and more or less reticulate 
elsewhere. 
Eadial congeries of tubes numerous and defined, and the interradial tubulation is open 
or close and varicose. 
&enus: STOLICZKARIA. 
Body very large, symmetrical, oblately spheroidal, covered with a great number of 
minute distinct granulations, which are circular at the base, short and rather flat where free, 
and which are separated by an amount of surface about equal to their breadth. No pores 
exist. Tube openings occur on the granulations, and tubes, with or without openings, con¬ 
verge to their base and cover the intermediate surface. The tubes opening on to the granu¬ 
lations are terminations of the very numerous radial series, and are small; and the others> 
which are larger, belong to the closely-packed varicose and much contorted interradial series. 
The body within consists of a vast number of small, not very conical, but rather straight, 
radial series, whose rather distant tubes give ofi; minute offshoots to the surrounding large 
tubes of the close interradial series. No coenenchyma can be discovered. 
I have named the most remarkable of all these fossils, those which belong to the poreless 
division of the order, after the distinguished Palseontologist, whose loss, whilst in the perform¬ 
ance of his duty and whilst studying these very forms, is greatly and justly regretted. 
IV.—A DESCUIPTION OP THE SPECIES OE THE GENUS SteINGOSPHJEBIA. 
There is nothing more unsatisfactory than the endeavour to separate and define rhizopodal 
forms into species, and the attempt would not have been made in this instance were there not 
five well-characterised types of the first, and one of the second genus. 
As the presence and absence of pores have been held to be of generic value in classify¬ 
ing the order, so the paucity or abundance of them can enter into the specific diagnosis ; 
moreover, the surface ornamentation, although of doubtful value, becomes more important 
to the specialist when it is accompanied, or not, by an open or close condition of the interradial 
tube series. 
There is one group of the genus SyringosphcBria in which the pores are in excess, and occupy 
as much of the surface as the eminences do. This forms a specific distinction and is all the 
more important, because the presence of former pores can be detected within the body, 
and the interradial tube reticulation is rather close. These, then, are the specific characters 
of Syringospli(Bria porosa, Plate II, Pigs. 3 and 4. 
The kinds with compoand verrucose elevations have a moderate number of pores and 
a very open tube reticulation in the interradial series; they form, with the group possessing 
compound and simple monticules, a tolerably well-defined set, divisible into two species by 
the surface growths. They are Syringosphceria verrucosa and Syringosp)h(jeria monticularia; 
Plate I, Pigs. 1 to 12 ; Plate III, Pigs. 1 to 4, 8 and 9. The species Syringospliceria mon- 
iicularia is, however, subject to variation, and the monticules may be very flat, the whole 
surface being nearly level, or the eminences may be sharply defined. The forms classified 
under the last head constitute the variety aspera; Plate II, Pigs, band 7. A form with 
granular and minute processes with pores leads to the next genus. It is Syringosplioeria 
plana. All these are w^ell defined and readily recognised species. 
