322 MR. G. KREFFT ON NEW AUSTRALIAN SNAKES. [ May 13, 
three upper and three lower labials, the middle one largest, covering 
nearly the whole upper and lower lip (scales large and much imbri- 
cated, in sixteen rows). Occipitals not much larger than the super- 
ciliaries, very irregular, with sometimes a plate between them, and 
much broader than long. Tail much compressed, ending in a large 
flat scale, with two or three denticulations and a strong keel on each 
side. Scales in sixteen or seventeen rows, hexagonal, much imbri- 
cated, and covered with from five to ten or more tubercles. Ventral 
plates much tuberculated, in particular those near the tail. 
EmMYDOCEPHALUS ANNULATUS. 
Scales in 16 or 17 rows. Ventral plates 144. One anal plate. 
Subcaudals 36 (ending in a broad spine). 
Total length 30 inches. 
Scales large and imbricated. Head small, about as long as broad, 
covered with rounded plates, which are more or Jess raised in the 
middle and much tuberculated ; one or two elongate shields wedged 
in between the superciliaries ; the number of upper and lower labials 
reduced to three, a middle one of extraordinary size between two 
small scale-like shields, each scale and plate covered with many 
small tubercles, and the body encircled by thirty-five black and as 
many white rings. The white scales upon the back and sides more 
or less black, and some of the black rings white-spotted. 
Hab. Probably the Australian seas. Two specimens in the Mu- 
seum collection. 
EMYDOCEPHALUS TUBERCULATUS. 
Scales in 17 rows. Abdominal plates 135. One anal plate. Sub- 
caudal plates 30. 
Total length 32 inches, head 1, tail 52, girth 4. 
Head short, but longer than in the previous species ; neck rounded ; 
all the other parts of the body compressed, very stout, with strongly 
compressed tail, ending in a large flat scale or spine divided into three 
segments. Scales very large, hexagonal, the greater portion fully 
one quarter of an inch wide, much imbricated and tuberculated. 
Abdominal plates large, with a fold or ridge in the middle, but not 
keeled; each plate covered with several elongated tubercles. Head 
shielded, the sutures of the frontals and nasals forming right angles ; 
vertical nearly rounded; superciliaries large, five-sided ; occipitals 
short, much broader than long. Three upper and lower labials, the 
middle one very large, covering nearly the whole gape; the middle 
lower labial shield very irregular in form, with one or two indenta- 
tions. One anterior and two posterior oculars ; eye of moderate size. 
General colour uniform purplish brown; some of the scales on the 
side mottled with lighter brown spots. 
Hab. Probably the Australian seas. A single specimen in the 
Museum collection. 
