CARDIUM. 277 



first two specimens which he found. Both were living 

 when taken by the dredge. I cannot resist the oppor- 

 tunity of acknowledging my gratitude for the valuable aid 

 and communications which I continually received from 

 this kind friend for many years and up to the time of his 

 lamented and premature death. His gifted mind, varied 

 acquirements, generous nature, and great amiability 

 fascinated all who had the good fortune to know him. 

 He was a true naturalist. These and collectors are too 

 frequently classed together; but there is an essential 

 difference between them. The former loves science for 

 its own sake, and not for the childish pleasure of ac- 

 quiring many rare species or even a unique specimen. 

 He is never selfish or covetous, his only craving being 

 for the sympathy of others who have the same tastes as 

 himself. The mere collector is generally not so intel- 

 lectual or estimable. Dr. Lukis exemplified this dif- 

 ference. The feelings that prompted him to share the 

 discovery above-mentioned with a brother naturalist 

 were doubtless the same as those expressed by the most 

 philosophic of our modern poets in the following lines: — 



" Often have I sighed to measure 

 By myself a lonely pleasure, 

 Sighed to think, I read a book 

 Only read, perhaps, by me." 



May such characters never be wanting in our land ! 



C. papillosum is the C. scobinatum of Lamarck, C. 

 planatum of Renier, and C. Polii of Payraudeau. The 

 last-named author said that another species of Cardium 

 (C. echinatum), having papillse, was known before Poli 

 described the present species as papillosum ; but this 

 hardly seems a sufficient reason for changing the name. 

 The young is C. punctatum of Brocchi, but not of Phi- 

 lippi. 



