Diagnosis Large species reaching above 470 mm in length; primaries, approximately 102-117. No splenial teeth, the tongue fastened at tip; eye more or less distinct, in a socket, its orbit continuous with the tentacular groove; tentacle in front of and somewhat below eye, its distance from nostril more than three times as far as its distance from eye. Premaxillary-maxillary teeth, 14-14 to 16-16; prevomeropalatine teeth, 12-12 to 16-16; dentary, 9-9 to 14-14; preanal glands visible, at least in some males; vent somewhat Vshaped. Terminal part of body unsegmented. Color, slate, dark olive, or brownish, the grooves cream or yellowish below and on sides, and crossing over body posteriorly.