300 Analysis cj' Periodical JVorks 



Account of the Marine Shells of North America, by Mr. .Say ; 

 among which the conchologist will find many new species. 

 On a new Locality of the Aitfomalite, by Lardncr Vanuxem. 

 Description of three new species of the genus Scicvna, by 

 M. Le Sueur. On the Cieology and Mineralogy of Franklin, 

 in Sussex County, liy L. Vanuxem and ^^^ IT. Keating. 

 Observations ujion the Cadmia found at the Ancram Iron- 

 Works, Columbia County, New- York, erroneously sui)posed 

 to be a new mineral, by W. H. Keating. On the Onychia 

 angulata, by INI. Le Sueur ; and Description of some Crystals 

 of Sulphate of Strontian li-om Lake Erie, by Dr. J. Froost. 



We think the abstract we have now given of these inter- 

 esting volumes, will awaken some interest for the work among 

 the zoologists and men of science in this country. It ap- 

 pears to come out in monthly numbers ; but how such a long 

 interval has elapsed between the printing of the concluding 

 part of the first volume (whicli is dated 1818) nnd the com- 

 mencement of the third (which was published in July 1822), 

 we cannot divine. 'I'he booksellers are, Dobson in I'hiladel- 

 phia: and Miller, 69, Fleet-street, London. 



AXA1.YSIS or rERionJCAi. WORKS ox z()oi,o(;y and botany. 



Sowerbi/s Grnera of Shells. No. 13, 14. 



Hirropus Lam.: a genus formed of the Liiinsan Chama Hippopus, to 

 which Mr. yowerby has iiikled what he conceives tc be another species, 

 named by him //. ainmlarh, but lie has not subjoined a speciPiC character; 

 and it appears to us doubtful, wliether this shell should not rather have 

 been placed as a Cardiuni. C'la v AorriA Lam. ; a recent species of this peiuis 

 is here, for the first time, announced and figured by the name off. nycrta, 

 and an outline of Lamarck's C. eriiinata is likewise given on the same plate. 

 Orbicula: from the remarks on this, it ajipears Lamarck has formed liis 

 genus Di.srinn from some specimens of Orhicul'i Kurrcgira sent him by the 

 author! In fact, we know not where the present system of gcmix-nifd-hig 

 will terminate, for " the doctors" begin to bepuzzled by their own genera ! 

 PARMACEt.i,\ of Ciivicr : the shell of which covers only a portion of the 

 animal, and resembles a Linnasan Limpet. Ut)o\, Leach : the type of which 

 is Lepas auritn Linn. Cinaras : another genus of Lin)iEean Barnacles (or 

 Cirripedes of the moderns) forn)ed from the L. villo.ia of Linn., a shell 

 found on our own coasts. 



Haliotis: a genus remaining nearly the same as it was left by Linna[>us, 

 except in having the imperforate Earshells removed to another family. Three 

 species are figured. Rotklla : separated by Lamarck from the Trorhi, the 

 type of which is Trochnsvcsii(irhi.t{\Jinn.). Avircr.A, Lamarck: accompa- 

 nied by the description and figure of a new and beautiful species, A.ncidenia, 

 thus defined : " testii coliqua oblonga, aculeata, aculeis compressis subim- 

 bricatis, confertiusculis, subdepressis ; cauda longiorc spinifera ;" the term 

 Cauda, however, is quite inadmissible as ap|)licd to the winged process in bi- 

 valve shells, for the same term is usetl to express the base of univalves. 

 Mr. Swainson has judiciously termed this part /ivea cmd'tnalis. Ancylus : a 

 genus including the fresh-water Limpets. Achatina : with which is united 



the 



