in ichthyology, a genus belonging to the order of thoracici. The head is fat, naked, depressed, and marked with a number of transverse ridges: it has ten rays in the branchiostegal membrane; and the body is naked. There are two species, viz. 1. the remora, with a forked tail, and eighteen striæ on the head. It is found in the Indian ocean. 2. The penechites, with an undivided tail, and twenty-four striæ on the head. It is likewise a native of the Indian ocean.