Abstract
MCZ 29788, a sea-snake from Broome, Western Australia previously identified as Lapemis hardwickii, proves, upon re-examinations, to be a specimen of Ephalophis greyi M. Smith, previously known from 3 specimens from the Broome region. Study of this specimen shows E. greyi to be similar to E. mertoni (Roux) in skull structure, but MCZ 29788 retains a vestigial left lung, not previously observed in any true hydrophiine. In many features, Ephalophis greyi appears to be the most primitive member of the Hydrophiinae and serves to link that subfamily with the genera Rhinoplocephalus and Drepanodontis, swamp-living Australian members of the Elapinae.
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