Figure 199- Thigmotricha. A, Morgania {Conchophthirus) mytili from Mytilus edulis ; 

 B, C, Ancistruma mytili from Mytilus edulis, B, dorsal view, C, lateral view, tuft of 

 straight tactile cilia near anterior end; D, Plagiospira crinita from Loripes lacteus ; E, F, 

 Hypocomina carinata from Alytilus edulis; G-I, Hypocoma parasitica: G, lateral view, 

 tentacle and tubular structure below, H, ventral view, I, two hypocomids attached to 

 Zoothamnium. (A, after Kidder, 1933a; B, C, after Kidder, 1933c D, after Issel, 1903; 

 E, F, after Raabe, 1934a; G-I, after Plate, 1888.) 



