462 AMPHISBENID.E. 
Frontal forming a broad suture with 
the rostral ; first upper labial scarcely 
larger than the second .......... 14. onychocephalum, p. 468. 
B. Frontal very large, covering the occiput. 
Prefrontals present, narrow, widely 
Separated. oc waa a eke want 15. octostegum, p. 468. 
No prefrontals ............ 00-0 16. scutigerwm, p. 469. 
1. Lepidosternon microcephalum. 
Lepidosternon microcephalum, Gray, Cat. Tort. p. 73, 
and Sh. Rept. ii. p. 39. 
Leposternon microcephalus, Wagl. in Spix, Serp. Bras. p. 70, pl. xxvi. 
fig. 2. 
Ain cae punctata (non Bell), Wied, Abbild. Nat. Bras, 
Lepidosternon microcephalus, Wagl. Icon. Descr. Amph. pl. xvi. fig. 1. 
—— maximiliani, IF tegym. Arch. f. Nat. 1836, p. 157, pl. iii. fig. 3. 
—— microcephalum, Dum. § Bibr. v. p. 505; Strauch, Mél. Biol. 
Ae. St. Petersb. xi. p. 424, 
Premavxillary teeth 1 or 2; maxillaries 4—4; mandibulars 5—5. 
Snout with three more or less marked longitudinal grooves; rostral 
large, but widely separated from the ocular; a pair of large pree- 
frontals, forming a suture, separating the rostral from the frontal, 
which is hexagonal an1 as broad as long or a little broader than 
long ; a pair of parietals and a pair of small occipitals ; eye slightly 
distinct through the good-sized ocular; a large supraocular, followed 
by a rather larger upper temporal; two upper labials, first large, 
second smaller than and under the ocular ; mental small, four-sided, 
broader than long, followed by a large median chin-shield; two 
lateral chin-shields on each side, in contact with the anterior infra- 
labial ; two lower labials, first very large, second very small. Two 
hundred and seventeen to two hundred and sixty-three annuli on 
the body, and thirteen to sixteen on the tail; an annulus on the 
middle of the body contains forty-six or forty-eight segments, 
twenty-two or twenty-four dorsal and as many ventral; the ventral 
segments a little larger than the dorsals. Pectoral shields numerous, 
a median pair longest, with two or three elongate ones on each side, 
the others small. Preeanal segments six, median and outer pairs 
largest. Lateral, vertebral, and ventral lines distinct. Yellowish 
in spirits, the dorsal segments with a brown spot in the centre. 
millim. 
Length to: ventcc a edeaaeeyies 470 
Dail ist wen ee eaersaes ness 28 
Diameter of body ............ 20 
Brazil. 
a. Ad, (Annuli 218413). Rio Janeiro. Mrs. Fry [P.]. 
b. Ad. (A. 234415). Brazil. 
ce. Hgr. (A. 217+18). Brazil. 
d. gr. (A. 263416). Brazil. Derby Museum 
