Van Name. — Simple Ascidiaiis. 
PLATE 71. 
Fig. 148. Caesira pannosa (Verrill). Specimens from the Bay of Fundy. 
Nat. size. 
Fig. 149. Tethijum molle (Stimpson). Specimens from Vineyard Sound, 
Mass. Nat. size. 
Fig. 150. Caesira arenata (Stimpson). Specimens from Long Island Sound 
near New Haven, Conn. Nat. size. 
Fig. 151. Caesira vianhattensis (DeKay). Vineyard Sound, Mass. Nat. 
size. 
Fig. 152. Caesira manhaUensis (DeKay). Three individuals from Vineyard 
Sound, Mass. Nat. size. 
Fig. 153. Tethyum partitum (Alder). Two specimens from Vineyard 
Sound, Mass. . Nat. size. 
