FOSSIL ANNELIDANS. 
387 
traces of their existence, except the holes they 
perforated, and the little accumidations of sand 
'^r mud cast up at the orifice of these perfo- 
rations; in a preceding chapter* we have noticed 
examples of this kind. We have also abundant 
evidence of the early and continued prevalence 
ef that order of Annelidans, which formed shelly 
ealcareous tubes, in the occurrence of fossil Ser- 
Pulas in nearly all formations, from the Tran- 
sition periods to the present time. 
SECTION II. 
Second Ciass of Articulated Animals, 
FOSSIL CRUSTACF.ANS, 
history of fossil Crustaceans has been hitherto 
^^aiost untouched by Paleeontologists, and their 
•■elations to the existing Genera of this great Class 
the Animal Kingdom are too little known to 
^^niit of discussion in this place. We may judge 
their extent in certain Formations, from the 
^t, that in the cabinet of Count Munster, there 
® nearly sixty species collected from a single 
ntuni of the Jurassic Limestone of Solenhofen. 
* See note at page 260. 
