CHAP. xv. NEW SPECIES FOUND. 313 



what oval, the entrance being invariably at the top, 

 " These nests," says Mr. Bate, " are evidently used as 

 a place of refuge and security, in which the parent 

 protects and keeps her brood of young until they are 

 old enough to be independent of the mother's care." 

 The accompanying illustration is taken from Messrs. 

 Bate and Westwood's book. In this case, the nests 

 were built in Plumularia, off Polperro, Cornwall. 



A few extracts from Mr. Norman's and Mr. Bate's 

 letters will serve to show the numerous new species 

 which Edward continued to forward to these eminent 

 zoologists. 



Mr. Norman (September 24, 1862) writes : " The 

 Mysis I referred to in my last letter is undescribed ; 

 and I propose to call it Mysis longicornis. Might I 

 be allowed to keep the specimen ? I retain it at any 

 rate for the present, in order to draw up a description 

 and figure. 



" I have made a most important discovery since I 

 last wrote. On looking again at the specimens (of 

 the Parasites taken by Edward from the Sun-fish) 

 I find that I had confused two species together as 

 Lcemargus muricatus, and had passed by as the male 

 of that species (looking at them only with the naked 

 eye) a distinct species, which is new to Britain, and 

 which I am at present unable to name." 



Mr. Norman wrote again (January 3, 1863) : 

 " Thanks for the Hyperia, which belongs to a different 

 species to those you previously sent me. At present 



