KARAKORAM STONES, OR SYRINGOSPIDERID^E. 11 



masses of tubes running over .it, converging on the eminences, and more or less reticulate 

 elsewhere. 



Radial congeries of tubes numerous and defined, and the interradial tubulation is open 

 or close and varicose. 



Genus: 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 off 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 Palaeontologist, whose loss, whilst in the perform- 

 ance of his duty and whilst studying these very forms, is greatly and justly regretted. 



IV. A DESCRIPTION OP THE SPECIES OP THE GENTJS SYRINGOSPH&RIA. 



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 Syringosphceria 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 Syringosphceria porosa. Plate II, Figs. 3 and 4. 



The kinds with compound 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 Syringosphceria monticularia; 

 Plate I, Figs. 1 to 12 ; Plate III, Figs. 1 to 4, 8 and 9. The species Syringosphceria mon- 

 ticularia 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 aspara ; Plate II, Figs. 6 and 7. A form, with 

 granular and minute processes with pores leads to the next genus. It is Syringosphceria 

 plana. All these are well defined and readily recognised species. 



