290 MEMOIRS OF THE CARNEGIE MUSEUM 
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mis se se 53 3 
I = 5 =o zs =e eS of) ee = 
ie 4 = #2 | Sa | 22 aS ee me 
Size} bir! Sirs os aS 
TB | 4B | FB ee |e 
Dermochelisrrrene- teense. eee ease 100 43 39 127 180 209 1738 86 | 23 
J BRA TTROB IANS 20000096000020008000005000 100 53 Aue 49 89 12& 105 44 12 
Golpochelystimemeren neces eee 100 57 51 56 92 131 107 44 13 
WPEGLOSLEQ Ota nano tec ccaise mentees suk 100 60 50 50 86 128 11@ | SO | Wy 
PAT CRELO Me deatceaee os eels anes oh 100 54 51 — — “= — — — 
Roxochelasreneswese noses.) ceeeeiscost sacs 100 58 | 50 | 51 73 100 104 G® —|- alil 
(ONGUTEE Gs: ‘Goonce. ene! conodonsaueasosee6e 100 52 53 50 72 73 55 50 | small 
Acichelys = (Eurysternum). ...... 100 57 51 40 54 63 66 51 17 
Inspection of the above table shows : 
L. Strongly marked radial and ulnar decrease in length. 
2. Marked tendency to radial elongation as compared with the ulna, with con- 
siderable variation in the length of the radius and ulna as compared with the 
humerus. 
5. Nearly static length of the first finger in the Cheloniidx, with a sharp increase 
in Dermochelys. 
4. That elongation of the second finger appeared slowly. 
5. Early and persistent increase in the length of fingers three and four. 
6. More or less variable tendency to elongation of the fifth finger, with a sharp 
increase in Dermochelys, and a suggestion that this finger may have first elongated 
in some forms, and then undergone decrease in length. 
7. Great and persistent pisiform increase, which began relatively early. 
8. Increased finger disparity is mainly codrdinated with depression of the radial 
crest. 
Ill. Tur Hrinp Fiirrer. (Fig. 5.) 
The presence of an entire pelvis and the complete hind flippers, save only the 
ungual phalanges of the right second digit, and of both fifth digits is quite all that 
the most exacting anatomist could wish. Although as the result of compression in 
the matrix the bones are of slightly broader outline than in life, their proportions 
are, as in the front flippers, fairly well retained. Likewise, as is so often and so 
fortunately the fact in the fossils from the Kansas chalk, most of the articular 
facets and surface characters are, as in the other parts of this excellent specimen, 
clearly indicated. : 
Regarding the pelvis it is only necessary to note that the obturator foramen 
must have been completely enclosed by the close contact of the ischium and ento- 
pubis on the median line as in Archelon.” The figures given herewith would not of 
15 Wieland, luc. cit., ‘‘ The Skull and Pelvis, ete., of Archelon,’’ p. 247. 
