202 DEATH OF CIVIL PRESTWICH. [1866-67. 



researches on the coal-field of Coalbrook Dale. For 

 the two species of Limulus then recorded by Prestwich 

 Dr Woodward proposed the new genus Prestwichia, as 



Prestivichia (Limulus} rotundata, Prestw. 



it was necessary to separate the old forms of Xiphosura 

 from those now living. 1 



Prestwich was now serving on two Royal Com- 

 missions, his practical knowledge of each subject 

 rendering him a valuable member of both. The only 

 leisure for superintending his planting and building 

 was snatched on Saturdays, when by the earliest 

 train on dark winter mornings he and his sister 

 Civil made their way to Shoreham to watch each 

 step of progress. But before the end of December 

 the shadow of death darkened his home, and he 

 was overtaken by the greatest calamity which had 

 yet befallen him. This was the death, after a 

 short illness, of his sister Civil, which took place on 

 the 27th December. She had been his devoted com- 

 panion during the last ten years of her life. This loss 



1 Quart. Journ. Geol. Soc., vol. xxiii. p. 32. 



