70 OPHIDIANS. 
No. 1. Hydrophis platurus scutatus. 
Coluber laticaudatus. L. mus. Ad. Fried. 
Laticandatus scutata. Laur. syn. rept. (Cantor). 
Hydrus colubrinus. Schneider. 
Platurus fasciatus. Lat. rept. 
Hydrophis colubrinus. Schlegel. 
Habitat, Bay of Bengal. 
Length 5 ft. and upwards. Abdominal scuta 218 to 241; dorsal scales 
disposed in 21 to 23 longitudinal rows; body surrounded by from 25 to 50 
black rings; an azygos shield between the posterior frontals; crown of 
head black; first and second black mark on head and neck are joined 
below by a black longitudinal band commencing from the chin; rostrum 
and side of the head yellow, with a black band running across the eye. 
No. 2. Hydrophis platurus Fischerii, Jan. 
Habitat, the tidal streams near Calcutta. 
Abdominal scuta 232 to 241; scales in 19 rows; trunk marked by 33 
to 36 black rings, which are broader than the interstices; a black band 
crosses the occiput and extends forward over the vertical plate and lower 
jaw, but is not confluent with the adjacent ring; upper part of rostrum 
yellow ; upper labials black. 
Two varieties of this species occur in Australia. 
Further species occurring in the seas about Australia are: 
No, 2. Aipysurus. 3 varieties. 
3. Disteira dol. 1 variety. 
4. Acolyptus. yy Ee 
5. Hydrophis. 4 varieties. 
6. Enhydrina. 1 variety. 
7. Pelamis bicolor. 1 “ 
And Krefft adds— 
No. 8. Emydocephalus. 2 varieties, 
Making in all 15 varicties already classified. 
