II. SlPHONOSTOMA 
( continued ) 
CLASS II.— CRUSTACEA. 
Ixvii 
ORDER II. — PiECiLOPODA ( continued ). 
Genus. 
Example of Species. 
I. Dichelestium, Herm. 
fi ls 
II. Nicothoe, Aud. & 
Miln-Edw ...... 
D. sturionis 
N. Astaci 
TRILOBITES. 
The singular fossils called Trilobites, are supposed by naturalists 
to have been Crustacea allied to entomostraca. 
The principal genera are 
1. Agnostus, Brong. 
2. Calymene, Brong. 
3. Asaphus, Brong . 
4. Ogygia, Brong. 
5. Parodoxides, Brong. 
