When, in a perfect mouth, the trophi can be considerably pushed forth or drawn in.
When, in a perfect mouth, the trophi are not capable of being much pushed out or drawn in.
He states that the trophi are soft and functionless, which is far from the case.
I compared the cirri and trophi with those of a common variety, and could detect not the smallest difference.
When the mouth wants any of the trophi, or they exist in it only as rudiments.
When an imperfect mouth has all the trophi but the Mandibul.
I shall begin with the Mouth, or rather the orifice in which the trophi or organs of manducation are inserted.
All the spines of the trophi are in some degree doubly serrated.
The trophi serve merely for the prehension of prey, and not for mastication.
The cirri and trophi are generally dark purple or lead-colour.