PROC. BIOL. SOC. WASH. 100(3), 1987, pp. 624-628 TWO NEW TURTLES FROM SOUTHEAST ASIA Carl H. Ernst and William P. McCord Abstract. — Cuor a chriskarannarum (Emydidae: Batagurinae), new species, from Yunnan Province, China, and Platysternon megacephalum shiui (Platy-sternidae), new subspecies, from northern Vietnam are described and compared with other members of their genera. The recent relaxation of regulations re-garding scientific exploration and the col-lection and export of reptiles from China and Vietnam have introduced many un-common and unusual animals into the pet trade. Dr. William P. McCord, a turtle fan-cier, obtained a number of turtles and rec-ognized that some of these animals repre-sented new taxa. Two of these are described below. Methods and Materials Straight-line measurements of each spec-imen were taken with dial calipers accurate to 0. 1 mm, of the greatest carapace length, carapace width and depth at the level of the seam between vertebrals 2 and 3, marginal width (the difference between the carapacial width and the width across the pleurals tak-en between the points of juncture of the marginals and pleurals at the level of the seam between vertebrals 2 and 3), greatest plastron length, greatest width and length of both plastral lobes, greatest bridge length, greatest width and length of vertebrals 1 and 2 and pleural 2, and the medial seam length and greatest width of all plastral scutes. Notes and drawings were made of head, neck, limb, carapacial, plastral, and bridge patterns. Colors were recorded from living turtles and color transparencies. Shell pro-portions are expressed as ratios of one mea-surement to another. Sixteen ratios proved useful (abbreviations used in the text are given in parentheses): width/length of cer-vical scute (W/L CS), width/length of first vertebral (W/L 1 st V), width/length of sec-ond vertebral (W/L 2nd V), width/length of second pleural (W/L 2nd PI), marginal width/carapacial width (MW/CW), margin-al width/carapacial length (MW/CL), cara-pacial width/carapacial length (CW/CL), carapacial depth/carapacial length (D/CL), carapacial depth/carapacial width (D/CW), plastral length/carapacial length (PL/CL), bridge length/plastral length (B/PL), bridge length/carapacial length (B/CL), length of anterior plastral lobe/plastral length (APL/ PL), width of anterior plastral lobe/plastral length (APW/PL), length of posterior plas-tral lobe/plastral length (PPL/PL), and width of posterior plasteral lobe/plastral length (PPW/PL). The number of rows of large scales at the lateral edge of the antibrachium between the claw of digit V and the first horizontal skin fold proximal to the elbow (presented in text as foreleg scale rows) was recorded. Specimens from the following collections were examined (abbreviations used in the text are given in parentheses): William P. McCord personal collection of living turtles (WPM), National Museum of Natural His-tory, Smithsonian Institution (USNM). Cuora chriskarannarum, new species Fig. 1 Holotype.-USNM 266162, adult male; Ta Lau Shan, Yunnan Province, China (23°30'N, 102°25'E); Oscar Shiu, Sep 1986. Paratype.-\JSl>iM 266163, adult fe-male; Chinsha (=Chin ' Ping), Yunnan
BioStor
