tibus incisoribus maxillce superioris verticalibus, inferioris hori- 

 zontalibus, pone Mas osse scabro utrinque parvo. 

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

 Hab. in Oceano Pacifico, Chiliam alluente. 

 In maxilla superiore dentes incisores approximate, elongati, sub- 

 sequales, (externis longitudine parum decrescentibus,) utrinque 

 tres ; dein laniarius parvus discretus, quern sequitur alter minimus 

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

 rum primus major, secundus minor, tertius minimus, omnes ap- 

 proximati j dein laniarius parvus discretus, et ab hoc dimoti et inter 

 se discreti laniarii minimi tres. 



An Agriopus, Cuv. and Val., from the same locality with the pre- 

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

 lished by MM. Cuvier and Valenciennes of their 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 anal there were three more than in the species 

 referred to ; the rays in the specimen exhibited being D. -H-. A. x v« 

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

 South America, like those of the Cape of Good Hope, are inhabited 

 by two species of Agriopus; but it was 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. Cuming in the 

 Atlantic Ocean, were regarded by Mr. Bennett, notwithstanding 

 some important differences in their proportions, as belonging to one 

 species, which he described as new to science, although nearly 

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



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

 caudalique prceditus :'. rostro cylindrico, producto : scutis dorsa- 

 libus quatuordecim, prceanalibus sedecim, caudalibus viginti sex : 

 corpore heptagono cauddque tetragond transversim pinndque dor- 

 sali oblique nigrescenti Jasciatis. D. 28. 

 Faem. rostro truncoque brevioribus ; hoc latiore ; ventre (ovis ex- 



clusis) baud carinato ; caudd longiore. 

 A Syng. Acu differt occipite minus elevato ; fronte subaequaliter 

 declivi, orbitis parum elevatis $ et prsesertim scutis longe pauci- 

 oribus. 



Specimens were exhibited of several Stomapodous Crustacea, also 

 from the collection 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 vessel 

 freighted by him for the express purpose of obtaining objects of 

 natural history. Among those now 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 segment, and like- 

 wise, as was particularly shown, by the first pair of pedipalpi being 



