COOKE: ON THE GENUS PURPURA. 327 



man who had himself gathered the shell in its native haunts by 

 dozens, and in whose collection they may still be seen, with 

 their claw-shaped opercula to testify to his entire and unassail- 

 able correctness of observation ! 



Page 200. — C. carlnifera Lam. ' Philippines, Ascension 

 Isles, St. Helena.' 



The last two of these localities rest on no valid authority. 

 Tryon no doubt puts them down to carinifera on the strength 

 of the misidentification dealt with in the next paragraph. 



Page 202. — C. inuricina Blainv. 'A number of authors 

 have assigned this species erroneously to Cuma, among them 

 Pease ('Am. Jour. Conch.,' IV., iii.), who quotes among the 

 synonyms P. turbinata Blainv., which=C///;/rtr carinifera Lam.' 



This is a remarkable instance of the effect of haste upon 

 Tryon's work. In the first place Pease, in the passage referred 

 to, never mentions a P. turbinata Bl., because there is no such 

 shell. There is a titrbinoides Blainv., and it is to this that 

 Pease refers. In the second place, P. turbinoides Blainv. does 

 not equal carinifera Lam. Turbinoides Blainv. is the same 

 shell as tJiiai-ella Quoy (' Voy. Astr.,' pi. 39, figs. 4, 5, 6), indeed 

 Blainville refers to Quoy's figure of thiarella as illustrating his 

 turbinoides. Tryon (probably without examining the figure or 

 description) jumps to the conclusion that thiarella Quoy equals 

 thiarella Lam., which latter is a form of carinifera Lara., hence 

 his conclusion '• P. turbinata Blainv. = C«OTa carinifera Lam.' 



It should in fairness be added that Quoy makes the same 

 mistake of supposing that his thiarella is the thiarella of La- 

 marck, a mistake which a study of Quoy's figures and description 

 will at once correct. 



Page 244. — '• P.viuricina Kien., t. 6, f. iT,b=Murex dubius 

 Sowb.' 



Another unhappy guess. Kiener is perfectly correct in his 

 figure of a very young shell of niuricina Blainv. {^turbinoides 



