from the London Cla>/. 2'S.i 



At tlif ujtj)er part of its lattral margin adjoins the flattened 

 mar^Miial i)late, | of an intli wiile. lietween the nuehal and 

 first eostal ril) there a|ijtfar to liavt- been three niar^^nnal plates, 

 none of which toiuh the first eostal plate. 



Tiie first eostal j)late appears to l)e an irri';::ular ])enta;;on, 

 about 1^ ineh lon^r at the suture with the first neural plate, 

 nearly 1^ ineh lonj; behind the nuehal ])late ; behind the 

 marginal plates it ai^ain becomes narrow. Herein it is unlike 

 the reeent marine Chelonia. 



The seeond eostal plate, whieh is less than 1^ ineh long at 

 the neural suture, widens at the nuu-ginal end to If inch. 

 The third and fourth costal plates measure at the neural suture 

 each ItV inch, but spi-ead a little towards the marginal 

 ends. The fifth and sixtii pairs are not so well preserved, but 

 similarly widen towards the margin, as does the seventh ])air. 

 The eighth pair of costal plates is much longer from back to 

 front than the seventh, and, as in the type of C. harvicensis^ 

 supports the eightli and ninth pairs of costal ribs. Beyond 

 this point the carapace is not preserved. 



I anticipate that it will prove to be specifically distinct from 

 the species described, and that the hyosternal bone next no- 

 ticed may be referred to it. 



A nodule exhibiting the greater part of a right hyosternal 

 bone similar in size to that in the typical specimen of C. har- 

 vicensis. Its shortest measurement, from the deeply cup])ed 

 front to the hyposternal suture, is about 1^ ineh. At the free 

 marginal side the sharp rays are well seen ; they differ from 

 the type in being elevated above the bone on w^hich they rest, 

 much as the rib is elevated in its passage along a costal plate. 



Scarcely any group of described vertebrates more urgently 

 demands a renewed critical study than the Tertiary Chelonia. 

 The ease has yet to be made out which will justify the refer- 

 ence of any one of Prof. Owen's species to the genus Chelone, 

 while the majority are obviously Emydians, w4th very little 

 to even insinuate their affinity with the chelonian suborder, 

 some, like the so-called Chelone longtceps (Owen), being va- 

 luable new types for comparative study. 



GlossochelySj if the hyoid bones can be credited with such 

 an inference, may have had a voice like a tnimpet, and have 

 served as an_ alarmist to the gentler inhabitants of the Spice 

 Islands of lat. 51° or 52°, whenever he gave tongue. 



