68 MUSEUM OF COMPARATIVE ZOOLOGY 



choice specimens, especially from Jamaica and Cuba, and many 

 type and figured specimens, including the Arnold and Clark types. 

 In the collection of Post-Palaeozoic fossil echini there are many 

 casts that Louis Agassiz had made at Neuchatel. A catalogue of 

 these casts was published by Agassiz in 1870, and they are also 

 recorded in Desor's "Synopsis des echinides fossiles," and in other 

 publications. While not usually of much value for detailed study, 

 these casts have a distinct historic interest and represent many species 

 which are otherwise non-existent in the collection. Besides the 

 Agassiz casts there are in the collection many casts of Post-Palaeozoic 

 echini received from Cotteau. 



