PLATE XL 
Fig. 1. Trochostoma violaceum, Studer. View of the internal organisation from the 
anterior portion of the body, a, calcareous ring ; b, tentacular ampullae ; 
c, water- vascular ring ; d, Polian vesicle ; e, madreporic canal ; f, intestine ; 
g, vessels ; x, genital organs. 
Fig. 2. Anhyroderma simile, n. sp. Seen from the anterior extremity of the body. 
Fig. 3. Trochostoma albicans, n. sp. Anterior portion of the body with mouth and 
tentacles ; g, genital papilla. 
