Reptiles and Batrachians fi-om Paraguay. 345 



posterior pair, followed by small square shields ; eye distinct 

 throufi^h the ocular, which is in contact with the second or 

 second and third upper labials ; no prajocular ; two post- 

 oculars ; a subocular sometimes present, detached from the 

 third ui)pcr labial ; four ui)])er labials, fourth or third and 

 fourth small; sjmphysial bell-shaped, followed by a hej)ta- 

 gonal or heart-shaped chin-shield ; three lower labials, second 

 largest and followed by a large lateral chin-shield. 194 to 

 201 anuuli on the body and 19 to 21 on the tail ; on the 

 middle of the body each annulus divided into 74 to 80 seg- 

 ments, 36 or 38 above and 38 or 40 below the lateral line, 

 which is distinct ; the segments all longer than broad. Anal 

 shields 10 or 12, Pra3anal pores 4. Purplish brown above, 

 whitish below ; a yellowish-white band or collar across the 

 occiput. 



Length to vent 420 millim. ; tail 40 j diameter of body 19. 



Several specimens. 



11. Lepidosternum lattjrontale, sp. n. 



Praraaxillary teeth 3, masillaries 2 — 2, mandibulars 4 — 4. 

 Snout obtusely pointed, with sharp horizontal edge ; rostral 

 large, its posterior border concave and in contact with the 

 frontal, which is very large, at least as broad as long, and 

 entirely or partially fused with the supraocular; no prai- 

 frontals ; a pair of large parietals, as broad as long or broader 

 than long, sometimes followed by a pair of smaller occipitals ; 

 eye more or less distinct ; two or three temporals ; two upper 

 labials, first largest; symphysial small, four-sided, broader than 

 long, followed by a large chin-shield ; lateral chin-shields very 

 small ; two lower labials, first very large. 236 to 263 annuli 

 on the body and 13 to 17 on the tail ; an annulus contains 56 to 

 64 segments, 26 to 30 dorsal and 30 to 36 ventral; the segments 

 all longer than broad or the median ventrals as long as broad. 

 Pectoral shields numerous, small, irregular, the largest con- 

 siderably longer than broad. Praeanal shields 6 or 8. Lateral 

 line strongly, vertebral and ventral lines feebly marked. 

 Colourless or pale purplish brown above. 



Length to vent 320 millim. ; tail 20; diameter of body 12. 



Numerous specimens. 



12. Mahuia agilis, E,addi. 



13. Mabuia aurata, Gravh. 



14. Mahuia frenata. Cope. 



Ann. & Mag. N. Hist. Ser. 6. Vol. xiii. 23 



