502 BULLETIN 58, UNITED STATES. NATIONAL MUSEUM. 



femur with numerous long, blunt spines. Color (in alcohol) : Cara- 

 pace tawny ochraceous more or less clouded with darker brown; 

 underside black, margins of plastral lobes, bridge angle as well as 

 larger or smaller areas on imderside of marginals wax-yellow; head 

 on top dark tawny olive; an indistinct band on canthus rostralis, 

 lower eyelid and on supratemporal region as well as entire neck above 

 pale isabella-color; sides and underside of head and neck blackish 

 with several more or less well-defined, pale isabella-colored markings, 

 viz, a narrow postocular line over tympanic region to sides of neck, a 

 line on posterior half of upper lip crossing the lower jaw at angle of 

 mouth and an irregular broad mark on throat with branches on lower 

 jaw and anterior neck; horny jaws pale brownish; limbs with a couple 

 of ill-defined stripes of same color, and tail above 'similarly pale. 



Dimensions. 



mm. 



Greatest length of carapace 128 



Greatest width of carapace 84 



Greatest length of plastron 113 



Length of hind lobe of plastron 41 



Width of hind lobe of plastron 59 



Width of bridge 38 



Depth of shell 49 



W' idth of head 21 



Length of tail from vent 24 



Variation. — Boulenger, in Chinese specimens, notes the following 

 sequence in the length of the plastral shields, beginning with the 

 largest: Abdominals, femorals, pectorals, humerals, anals, gulars, 

 while our specimen from Okinawa shima and the specimen from 

 Ishigaki shima in the Kumamoto school show the following sequence 

 with regard to their plastral seams, beginning with the longest: 

 Abdominal = pectoral, femoral, anal, humeral, gular. Boulenger also 

 notes the axillary shield as absent, while in ours it is very distinct and 

 well-developed. 



Habitat. — The distribution of this species is still of considerable 

 uncertainty, as specimens with undoubted and explicit localities are 

 rare in collections. It is said to occur in Borneo and Sumatra, as well 

 as in southern China. It is not recorded from Formosa, but on the 

 other hand has been received from the Riu Kius. 



Hoist sent two specimens from Okinawa to the Zoological Society 

 in London, and Doctor Fritze obtained three spe.cimens at Tokuchi- 

 mura on the west side of Okinawa shima. The Imperial Museum, 

 Ueno Park, Tokyo, also has a specimen from Okinawa, and recently 

 the United States National Museum has obtained, through Mr. Ows- 

 ton, a specimen from Naha (No. 34053). 



Professor Ijima has sent me excellent drawings of a specimen belong- 

 ing to the Kumamoto Higher Middle School. It was collected in 

 Ishigaki shima of the Yaeyama subgroup in February, 1893. 



