ERRATA. 



The distance of the author from the press, and the hasty manner in which he has been 

 compelled to inspect the proofs, have occasioned mistakes, which a more deliberate revision of 

 the text would have prevented. Errors that are merely typographical are too obvious to re- 

 quire notice ; those which affect the sense are here subjoined. 



Page 15, hne 28, for "Jirst," read Arun. 



22, 19, — " Bracksley," read Bexley. 



23, ' 18, — " west," read coast. 



27, 7, — " i7isulated," read inshiuated. 



30, 3, — " these" read there. 



38, 'il9, — " they" read the stiata. 



82, — - 16, — " aucula 'pectinat" read munda pecthiata. 



101, 5, — " the marl," read since the marl. 



106, 26, — " spi7ious obtuse," read obtuse spincnis. 



—^ 108, 8, — " closet," read closely. 



112, 11, — "have,'" read has. 



—^ 141, — — 31, — " B?-ongniai-ti,^' read Hoperi. 



164, 29, — " spongus corptis," read spongus. — coipus 



^— 172, 9, — "a state," read the state. 



174, 18, — " been closed," read be enclosed. 



178, 15, — " et d'eponge." read d'eponge. 



253, 20, — " circumstances similar," read similar circumstances. 



In the Wood cut, p. 175, the letters of reference b. c. are misplaced: the former should 

 stand in the place of the latter. 



*»* Since this Volume was committed to the press, the public have been favoured with an elegant and highly 

 interesting work on the Trihbitcs and fossil Crusiacea, by M. M. Brongniart and Desmarest, in which allusion is 

 made to the specimens from the Sussex chalk ; and it is highly gratifying to me to find that the opinions of these 

 eminent naturalists coincide with those I have advanced in the following pages. On the species which I have 

 named Astacus Leachii, (see p. 221.) M. Desmarest offers the following remarks: — " Le crustac^ auquel apparte- 

 naient ces pinces, avail la forme ordinaire des Macroures, et ne presentait, sur les pieces que nous avons vues' 

 d'autres caracteres ext(?rieurs que ceux qui consistaient dans la presence de trois forts tubercules sur chaque cot^ 

 de la carapace, qui etait d'ailleurs tres-rugueuse. II ^tait un peu plus grand que I'Ecrevisse fluviatile." — Crust. 

 Foss. p. 137. The fossil Crustacea of the Blue marl, (see p. 97.) this celebrated philosopher considers, with Dr. 

 Leach, as being nearly related to the genus Corystes, {Crust. Foss. p. 125). The Scyllarus Mantelli of M. Des- 

 marest {Crust. Foss. p. 130.) is, I beUeve, from Sussex, but as I have some doubts on the subject, it is not noticed 



in this volume. Vide Histoire Naturelle des Crustaces Fossiles, par A. Brongniart, et A. G. Desmarest. one vol. 



4to. with Eleven Plates, price 1/. \s. 



