On a new species of Neoechinorhynchus Hamann, 1892 (Neoechinorhynchinae Travassos, 1926) from Eleutheronema tetradactylum (Shaw, 1804) from Digha coast, West Bengal, India.

Neoechinorhynchus ( Neoechinorhynchus ) dighaensis n. sp. is described from the intestine of the fourfinger threadfin fish Eleutheronema tetradactylum (Shaw, 1804) from the Digha coast, West Bengal, India. Females were larger than males. In the male dorso-ventral lacunar canals well developed. Middle hooks in perfect circle, smaller than anterior hooks. Posterior hooks slightly smaller than middle hooks. Lateral anterior proboscis hooks larger than the others in same circles. Lateral posterior proboscis hooks equal to others in same circles. Lemnisci equal, longer reaching to testes in male. Male reproductive system usually occupies half of the total body length. Eggs were elliptical in shape with concentric membrane. Cement gland long, containing seven giant nuclei.