b. Mouth terminal; "neck" highly Genus *_Lacrymaria_
elastic; entire body
flexible; conical "head"

c. Mouth terminal; "neck" highly Genus *_Trachelocerca_
elastic; entire body
flexible; "head" square

d. Mouth terminal; "neck" highly Genus _Lagynus_
elastic; no separate
mouth-bearing portion

6. a. Body asymmetrical; bristles Genus _Stephanopogon_
in addition to cilia

b. Body symmetrical; 4 small Genus *_Mesodinium_
tentacles from mouth; cilia
and cirri in girdles

7. Shell composed of small Genus *_Tiarina_
sculptured pieces; cilia long,
uniform

* Presence at Woods Hole indicated by asterisk.


Genus LACRYMARIA Ehr. '30.

(Ehrenberg, C. G., 1838; Perty '52; Claparède & Lachmann '58; Stein
59-83; Quennerstedt '66, '67; Fromentel '74; Kent '81; Gruber '84;