-230 REPORT OF NEW JERSEY STATE MUSEUM. 
carapace above marginal concavity. Inguinal and axillary 
plates large. Plates of carapace all more or less smooth. Plas- 
tron elongate, of more or less even width, rounded convexly in 
front, and rather elongately convex behind. Anterior margin 
slightly emarginate medianly and posterior margin broadly 
emarginate, with slight notch on each edge at femoral and anal 
sutures. Plates on plastron with rather obsolete longitudinal 
wide-set striz. Color of carapace when dried dull brownish, with 
dull brownish reticulating lines of various pattern all.over. In- 
ferior portions of marginal shields pale brownish like unicolor 
plastron, only with a number of transverse brownish lines more 
or less convergent around each suture from edge of shell. 
Sutures of plastron dusky. Length of carapace 6 inches. Bay- 
side. Witmer Stone. ; 
The above described shell is the only information I have con- 
cerning this species. 
Graptemys geographica Abbott, Geol. N. J., 1868, p. 800.— 
Stone, Am. Nat., XL, 1906, p. 160. 
Genus MALACLEMYs Gray. 
The Salt Marsh Turtles. 
Malaclemys centrata concentrica (Shaw). 
[PLATE 62. Malaclemys centrata (Latreille).] 
Diamond Back Terrapin. ‘Terrapin. Diamond Back. Salt 
Marsh Turtle. Salt Marsh Terrapin. 
Shell smooth or with concentric grooves. Greenish or dark 
olive, rarely black. Plates of carapace and plastron usually with 
concentric dark stripes. 
I have no fresh examples. Mr. Stone records it from Cape 
May (Dr. W. S. W. Ruschenberger), based on 2 shells, and 
another from Delaware Bay, though without definite locality. 
One was taken at Anglesea by Mr. Wm. J. Fox in 1896 on 
the salt-marsh. Mr. George Z. Hartman, of Palermo, Cape May 
