PLATE X. 
In all the Plates the following letters have the same signification. 
c. Marginal cirrus. 
cl. Cloacal papilla or opening. 
i. Intestine. 
m. Mouth. 
ma. Manubrium of the supporting stalk of the hook-apparatus. 
ov. Ovarium. 
p. Parapodium. 
ph. Pharynx. 
s. Sucker. 
t. Testicle. 
u. Hook of the hook-apparatus. 
S Male genital papilla or opening. 
Note . — The coloured drawings show the object seven times magnified; the uncoloured drawings are drawn with the 
Oberhauser camera and objective 0 (Seibert and Krafft), which magnifies 40 diameters, the hook-apparatus with camera and 
objective IV. , which magnifies 220 diameters, if the contrary be not expressly stated. 
Fig. 1 . Myzostoma abundans, n. sp. 
Fig. 1. The animal, seen from the ventral side ; only half drawn. 
Fig. 2. Myzostoma rotundum, n. sp. 
Fig 1. The animal, seen from the ventral side. 
Fig. 3. Myzostoma oblongum, n. sp. 
Fig. 3. The animal, seen from the ventral side ; only half drawn. The hind part of the 
body was quite destroyed, and is, as well as the last four cirri, hypothetically 
restored. 
Fig. 4. Myzostoma caribbeanum, n. sp. 
Fig. 4. The animal, seen from the ventral side; only half drawn. 
