114 GUIDE TO THE FOSSIL INVEETEBRATE ANIMALS. 



Gallery In addition to the particular specimens already pointed 

 srZl'cases attention may be directed to the following. Specimens 

 10 & 11. brought from the Arctic Eegions by various British expedi- 



FiG. 59. — An example of the spire-bearing Telotremata, Spirifer striatus. 

 Carboniferous Limestone. The shell is seen from the side of the 

 brachial valve, and portions of that valve are broken away, exposing 

 the spires that support the arms of the lophophore. Between the 

 umbones of the peduncular and brachial valves is seen the delthyrium, 

 partly filled in by the deltidial plates that have met and fused above 

 the foramen into a single deltidium. (From the " Cambridge Natural 

 History.") 



Fig. 60. — An example of the loop-bearing Telotremata, Magellania flaves- 

 cens. Recent seas, Australia. A. — Interior of peduncle valve. /, fora- 

 men for peduncle, below which are seen the two deltidial plates ; 

 t, teeth of hinge ; a, h, c, muscle-scars ; b', scar of peduncular attach- 

 ment. B. — Interior of brachial valve, c, c', cardinal process for 

 attachment of muscles ; b, hinge-plate, supporting cardinal process and 

 prolonged below into p, the median septum ; s, sockets for the teeth of 

 the peduncle valve ; I, loop, supporting lophophore ; a, muscle-scars. 



tions; a good series, chiefly of Spirifer, from the Permo- 

 Carboniferous rocks of Australia ; Silurian and Carboniferous 

 specimens from near Niti in the Northern Himalaya ; and 

 a Devonian series from the Hindu Khoosh. Many of these 



