258 LETTERS EKOM C. DAEWIN, ESQ., 



itself it is in fact a natatory pupa, for it has no mouth, only a 

 rudimentary shrivelled oesophagus, surrounded by the forming 

 trophi of the young Cirripede. Asthrobalanus (= Cryptophialus) 

 alone passes the first larva stage in egg, and appears when first 

 born with prehensile antennae, two eyes, etc. 



But perhaps I weary you with these details ; one forgets that 

 others do not care so much for a subject as he who is at work 

 on it. 



I have not yet gone through my bottles for MoUusca, but 

 will you be so good as to send me one line, to say whether you 

 care for any naked Terrestrial (as Yaginulus, Parmacella), or 

 aquatic naked MoUusca, or for any of Cuvier's "Tectibranches," 

 as Aplysia, etc., or whether exclusively for the Nudibranch. I 

 believe I have a few of each order. I fear that you will think 

 I have written to you at unreasonable length. 

 Pray believe me, 



My dear Sir, 



Yours very sincerely, 



C. Daewin. 



I begin, to think I shall spend my whole life on Cirripedia, so 

 slow is my progress, working only two to three hours daily. 



No. 5. 

 (No postal date. 1850 in A. H.'s writing.) 



Down Farnborough, Kent, 



15th. 

 My dear Sir, 



I ought to have sent you a line sooner to say that your 

 specimens arrived safely. I will venture to keep the Madeira 

 one till I commence reworking on the Pedunculata. I have 

 marked outside the box to be 'returned to you' after I have 

 taken a few. 



The Balanus I will return almost immediately. It is one of 

 the very few species which I dare name with little or no hesita- 

 tion without opening (with the aid of some part exposed near the 



