Page. Sp. 



7U 10 



rs 



558 KEPORT— 18G3. 



Yar. a. pe>vwfa,= V. mrn-f/an'fannn, Val. Yen. pi. 11. f. 2. (fii;-. min."), 

 Cal. -Mus. Cum. [AlHliated to tlie Calitornian s^pecies on suppusi- 

 titious evidence, and probably distinct. These appear to be frcuii tlio 

 tropical fauna.] Analogue of the \V. Indian T. dcoissafiis, GiU' 1. 

 21. ?Thyl(icodes oryzata, Morch. Probal>ly W. Central America, from the 

 adhesions; but " China: " Mus. Cum. 

 «, .. \&Y. X. animlata. Panama. Mus. Cum.* 



In P.Z.S.1861,pp. 229-233, is given a "Catalogue of a Collection of Terres- 

 trial and Fluviatile Molluscs, made by 0. Salvin, Esq., M.A., in Guatemala: 

 cy the Rev. H. B. Tristram." But few of the 49 species occur in Mexican 

 collections ; none are identical with W. Indian species, except such as 

 are of universal occurrence in tropical America ; and the 16 new species 

 show close generic affinities with the shells of the northern regions of S. 

 America. The shells have been identified from the Cumingian eelieetion. 

 The new species are described, and some of them figured. 



Page. No. PL Fig; 



230 1 . . . . Helix G/nesbref/hH, Nyst. The largest Helix in the New World. 



2 . . . . He'ix exiinia, Pfr. 



, , 3 . . , . Helix LiiUiana, Pfr., var. 



, , 4 . . , , Helix ennjomphahi, Pfr. Closely allied to the S. American 



H. laxata. 



, , 5 , , . . Helix coacfiliafa, Fer. 



, . 6 . . , , l>uli)iiu.s Pazianus, D'Orb. 



, . 7 . , . . Bidinnis Morieandi, Pfr. 



, , 8 . . . . Bifli)iiiti Hondiirafiti/iKS, Pfr. 



9 . . . . Bidimiis Dj/-oni, Pfr. 



10 26 8. Bidiinm sejnipellueidus, n. s. Allied to B. discrepans, Shy. 



. . 11 . . . . Suecinea ?jmtris, Ln. 



. . 12 . . , , Glandina Ghiesbreghti, Pfr. 



, . 13 . . . . Glandina Canninensis, Morelet. Described from Costa Rica. 



. . 14 . . . . Achatina, sp. iud. 



. . 15 , , . . Achatina ocfona, Lam. 



10 . . . . Si?iraxis Lattrei, Pfr. 



17 . . . . Smraxis Shuttleicorthii, Pfr. 



2 51 18 . . . . Spiraxis Cobanensis, n. s. 



19 . . . . Spiraxis, sp. ind. 



20 . . . . Leptinaria Emmelin(P, n. s. 



21 . , . . Leptinaria Elisce, n. s. / 



22 . . . . C'l/lindrella Ghiesbreghti, Pfr 

 . . 2.'> . . . . Cyhndrella Salpinx, n. s. 



• . 24 . . . . Physa Suwerhyana, D'Orb. 



.. 25 .. .. Physa purpurostonia, n. s. Lake of Dueiias. 



20 . . . . Planorbis corpideidus. Say. 



232 27 .. .. Planorbis tmnidm, Viv. [Comp. P. //wjews, Maz. Cat. 238.] 



28 . . . . Planorbis IVyldi, n. sp. Lake of Duefias. 



29 . , . , Planorbis Duenasiamis, n. s. Lake of Duenas. 

 . . 30 . . , . Planorbis, sp. nov., in Mus. Cum. 



.. 31 ., ., Seymentina Donbilli, n. s. Lake of Duenas. 



*. 32 .. .. Melampus fasciatus, Chem. Salt-marshes on coast. 



• . 33 . . . . Adamsiella Osberti, n. s. 



* The present posture of binomial nomenclature is well illustrated in this most elabo* 

 rate paper, which few naturalists have professed to understand. The shell of which the 

 operculum-spine is figured in plate 25. f. 16, is quoted as " Siphoniiim {Stoa) stibcre' 

 natum, V. spinosa." The shell described in Maz. Cat. p. 307 is 'quoted as " Vermetm 

 (Thylacodus) contortus, var. y. contortula {Thylacodus), forma 1, Thylocodus (?) com- 

 tortus, var. indentata, Cpr." Perhaps tlie sentences of Klrin and the early writers are 

 more easy to understand and remember. The Chiioaida of iliddendorii [v. Fii-st Eeport, 

 p. 214) are simple iii comparison, 



44 



