of some Marine Animals. 



319 



the third English edition of La P^rouse's Voyage^ and is also 

 figured in the volume of plates." — A. M. 



Remarks. — I have no opportunity of referring to the work 

 just mentioned; but the figure represents a gasteropodous 

 molluscum with naked branchiae, belonging to the genus 

 Glaucus of Cuvier. One species has been long known and 

 frequently figured: it is the G. hexapterygius; and no one 

 has mentioned it without some expression of admiration at its 



elegance and beauty. [G. 

 hexapterygius was figured 

 in last Number, p. 237.: 

 for conspection's sake, the 

 cut is here repeated, Jig. 

 40.] The animal now 

 figured ( Jig. 39. k), is 

 equally elegant and charm- 

 ing. The dark lines, the 

 spots on the head, and the 

 filaments of the branchiae, 

 are of a fine azure blue 

 colour, while the rest of 

 the body is tinted with pale 

 blue and pink. It differs 

 from the hexapterygius in having only two pairs of fan-shaped 

 branchiae, and the filaments in each are much fewer in 

 number; and these characters, I think, determine it to be 

 the Glaucus tetrapterygius of Rang, which, so far as I am 

 aware, has not been previously figured. * 



" Pauca haec vidimus operum Dei ! " 

 [We have seen these few of the works of God.] 



April 10. 1833. N. 



* Besides the figures given above, and so ably explained by " N.," 

 Mr. Mathews sent three others, lettered «, i, j. Of these " N." thought 

 it unnecessary to engrave or notice that lettered «, which appears to be 

 only b with its central part more enlarged ; and on i and j he remarks, " I 

 believe them to be only pieces of an animal." This information may be 

 useless to our readers generally, but will not be so to Mr. Mathews, who 

 closes his letter with this remark : — " In this part of the world, books are 

 among the scarcest articles, especially books on natural history. I have 

 therefore been unable to ascertain if they (the figures sent) are all known, 

 or if they have been published. I should feel obliged to any contributor 

 who has the means of ascertaining their names, to inform me of them 

 through the pages of the Magazine of Natural History, the receipt of 

 which, in this part of the world, is one of the greatest treats to me." 

 Repeated notices of the rich gathering of Messrs. Mathews and Bridges, 

 and other collectors in South America, are registered in parts viii. and 

 ix. of Hooker's Botanical Miscellany ; and at tab. xcvi. (part viii.) is figured 

 that plant, Mathewsfa foliosa, which Messrs. Hooker and Arnott have named 



