Nature of Vision in the Invertebrate Animals 317 



No. 49. Errones. I have seen intermediate specimens which 

 completely connect the C ovwn of Gmelin with this species. 



No. 61. Obvelata. Is the C.pressa of Solander, and was first 

 brought bj him from Otaheite. 



No. 65. Angustata. The C, maculala of Perry, t. 20. f. 5. i3 

 most probably intended for this species. 



No. Q7n Piperita. In Dr. Solander's MS. at the Banksiaa 

 Library, no mention is made of any species with this name. , , 

 No. 70. To this species the following Synonymes may be added, 

 Indian speckled Starling Cowry. Fetiver, t. 80. f. 9. 

 Cypra»a No. 43. Schroeter Einleitungy i. p. 146. 

 Cypraea arenosa. Solander*s MS. 

 Cypraea ovata. Perry ^ t. 21. f. 3. 

 No. 72. Flaveold. The shell here described accords badly 

 with the description in Mus. Lud. Ulr. p. 581. See note on 

 No. 35. 



No. 77. Listeria Is the C. marginalis of Solander's MS. and 

 of the Portland Catalogue. ,, , 



■ ; -... . .. ,,..M».VuiV A> 



NATURE OF VISION IN THE INVERTEBRATE ANIMALS. 



The following passage, concluding with a remark on the probable 

 nature of vision in insects, is extracted from the " General state' 

 ment oj the undulatory theory o/Lighty^ in the article "Light," 

 by Mr. Herschel, published in Part XX of the Encyclopajdia Me- 

 tropolitana, which appeared in April last. It is submitted to the 

 readers of the Zoological Journal, in support of a hypothetical 

 suggestion respecting the vision of certain groups of Molluscu and 

 Annelida^ contained in a paper " On certain organs of the Helkidoe 

 usually regarded as their eyes," printed in vol. ii., p. 497, which 

 some scientific friends of the authour have been disposed to regard 

 as improbable. In that suggestion, however, the same idea was 

 proposed on the nature of vision in the Mollusca and Annelida^ in 

 a general and perhaps an obscure manner, which Mr. Herschel, 

 with beautiful precision and particularity, has expressed on the 

 vision of Insects, 



