1861.] REV. H. B.TRISTKAM ON GUATEMALAN MOLLUSKS. 233 



3!). Macroceramus polystreptus, nov. spec. (PI. XXVI. 

 fig. 11.) 



T. conico-elo7iguta, Integra, albida, semipellucida, viv uvibilicata, 

 striis obliquis confer te ornata, et fasciis opacis irregiilariter picta; 

 spira regular iter turrita, apice aculissima castanea ; anfract. 

 12-14, convexi, ultimus non solutus ; sutura crenulata multis 

 strigis contract is; apertura verticalis, rotundaia; perist. ulbidum, 

 subdilatatum. 



Long. 16, diam. 4 mill. 



40. Helicina salvini, nov. spec. (PI. XXVI. figs. 9, 10.) 



T. globoso-tvrbinata, solidula, polita, vix striata, pallide citrina, 

 fasciis duabus castaneis, inferiore contractiore, superiore latiore, 

 cincta ; spira turbinata, acuta; anfract. 6, vix convexiusculi, 

 ultimus rotundatus, spiram dimidio superans ; columella brevis, 

 basi subsimplex, callum emittens tenuem ; apertura obliqua, semi- 

 lunaris ; perist. aureum, late e.rpansum, et reflexiusculum, ad ca- 

 rinam rostratum et in cornu elongatum extensum. 



Diam. maj. 14|, min. 12 mill., alt. 9 mill. 



Nearly allied to H. turbinata, Wiegm., from Mexico. 



41. Helicina AMtENA, Pfr. 



42. Helicina oweniana, Pfr. 



43. Helicina merdigera, Salle. 

 Described by Salle from Nicaragua. 



44. Helicina lindeni, Pfr. 



45. Helicina chryseis, nov. spec. 



T. acuto-conica, solidula, striatula et subgranulata, aurantiaca, 

 parum nitida ; spira acuto-conoidea ; sutura prof unda ; anfr. 6, 

 planiusculi, ultimus spira brevior, peripherio subcarinato, basi 

 circa callum flavo-aurantiacum straminea ; apertura angulato-ro- 

 tundata ; columella arcuata ; perist. expansum, refie.viusculum, 

 albo-limbatum. 



Diam. 3, alt. 4 mill. 



Hab. Mountain forests of Vera Paz. 



46. 47, 48. Three species of Paludinella, apparently unde- 

 scribed. 



49. Pachycheilus corvinus, Morelet. 



This magnificent Melania appears to attain a greater size in the 

 streams of Guatemala than in any of its previously noted habitats. 



My grateful thanks are due to Mr. Cuming for his kind and ready 

 assistance in determining the species. 



The following list of the additions made to the Menagerie during 

 the months of March and April was read to the Meetiag ; — 



