G. It. Wieland — Upper Cretaceous Turtles. 113 



as fflnys beatus. The name Adocus (Gr. A, privative; and 

 Ag)%o?, rafter) meaning literally without rafters, happily ex- 

 presses the fact that the rib heads (with the exception of the 

 first and second and tenth) are diminished to the merest line- 

 like trace on the inner surface of the pleurals. The general 

 characters of the genus, however, remained but vaguely known 

 until the description of the carapace of the new species Adocus 

 punctatus by Professor Marsh.* This was accompanied by 

 an excellent woodcut, which is here reproduced, fig. 1. 



Figure 1. — Adocus punctatus Marsh (type). Carapace x -J. — The original 



figure by Professor Marsh. 



Later the type was placed on exhibition in the Yale Uni- 

 versity Museum, although no attempt was made to bring the 

 carapace and plastron into their normal position until recently. 

 This having now been done, and this fine type having again 

 been placed on exhibition as finely mounted in erect position 

 by Mr. Hugh Gibb, an opportunity is afforded to supply the 

 much needed figure of the plastron, and present further facts 

 and figures showing the true form of this ornate and interest- 

 ing Cretaceous turtle. 



The remounting of the specimen proves that the outline of 

 the carapace departs from the oval form shown in the original 



* Notice of Some Extinct Testudinata. This Journal, vol. xl, 178 and 9, 

 1890. The type is from the long since abandoned pits of the old Cream 

 Ridge Marl Co. near Hornerstown, Monmouth Co., New Jersey, and was 

 received at the Yale Museum, Oct. 10, 1872. 



Am. Jour. Sci. — Fourth Series, Vol. XVII, No. 98. — February, 1904. 



