tibus incisoribus maiillce superioris verticalibus, inferioris hori- 

 zontalibus, pone illas osse scabro uiringue parvo, 

 D. 8. A. 5. C. 8. P. 25. 

 Hab. in Oceano Pacifico, Chiliam alluente. 



In maxilla superiore deiites incisores approximati, elongati, sub- 

 3jquales, (externis longitudine parum decrescentibus,) utrinque 

 tres ; dein laniarius parvus discretus, quem sequitur alter minimus 

 dimotus : in maxilla inferiore dentes incisores utrinque tres, quo- 

 rum primuš niajor, secundus minor, tertius minimus, omnes ap- 

 proximati ; dein laniarius parvus discretus, et abhoc dimoti etinter 

 se discreti laniarii minimi tres. 



An Agriopus, Cuv. and Vai., from the šame locality with tbe pre- 

 ceding fish, was shown to agree generally with the description pub- 

 lished by MM. Cuvier and Valenciennes of tlieir Agr. Peruvianus ; 

 but a deviation occurred in the number of the fin-rays, those of the 

 spinous portion of the dorsal fin being one less in number, while of 

 the soft rays of the anai there were tbree more than in the species 

 referred to ; the rays in the specimen exhibited being D. \į. A. -rV- 

 It appears therefore probable that the seas of the vvestern coast of 

 South America, likę those of the Cape of Good Hope, are inliabited 

 by two species of Agriopus; but it \vas not deemed advisable to 

 characterize a second until an opportunity should occur for a satis- 

 factory comparison of specimens. 



Various specimens of Syngnathi, obtained by Mr. Cumingin the 

 Atlantic Ocean, were regarded by Mr. Bennett, notvvithstanding 

 Bome importam difFerences in their proportions, as belonging to one 

 species, nhich he described as neu' to science, although nearly 

 allied to Syng. Acus, Linn. It may be thus characterized : 



Syngnathus fucicola. Syng. pinnis pectoralibus, dorsali, anali, 

 caudalicjue prceditus : rostro cylindrico, pradučio : scutis dorsa- 

 libus ąuatuoi-decim, prcEanalibus sedecim, caudalibus vigiiiti sex : 

 corpore heptagono cauddųue tetragond transversim pinndgue dor- 

 sali oblique nigrescentijasciatis. D. 28. 

 VcEm. rostro truncoque brevioribiis ; hoc latiore ; ventre (ovis ex- 



clitsis) haiid carinato ; caudd longiore. 

 A Syng. Acu difFert occipite minus elevato ; fronte subaequaliter 

 declivi, orbitis parum elevatis ; et prtesertim scutis longe pauci- 

 oribus. 



Specimens were exhibited of several Stomapodous Crustacea, also 

 from the coUection of Mr. Cuming, a collection extremely rich in 

 Crustacea, Mollusca, and other invertebrate animals inhabiting the 

 sea. A considerable portion of it was formed during a voyage in 

 the Southern Pacific Ocean undertaken by Mr. Cuming in a vessei 

 freighted by him for the express purpose of obtaining objects of 

 natūrai history. Among those no\v exhibited Mr. Owen pointed 

 out two new species, one of which belongs to that section of the 

 genus Squilla, Fabr., which is distinguished by the presence of 

 moveable spines at the extremity of the caudal segraent, and like- 

 H'ise, as was particularly shown, by the first pair o( pedipalpi being 



