190 



M. microphyllus, 

 capucinus, 

 asperrimus, 

 phyllopterus, 



acanthopterus, 



tripterus, 



trigonularis, 



iincinarius, 



hemitripterus, 



gibbosus, 



triqueter, 



trigonulus, 



brassica, 



saxatilis, 



M. 



endivia, 



radix, 



melanomathos, 



hexagonus, 



scorpio, 



secundus, 



quadrifrons, 



turbinatus, 



trunculus, 



anguliferus, 



melonulus, 



Magellanicus, 



lamellosus, 



erinaceous, 



M. tarentinus, 

 scaber, 

 costularis, 

 polygonulus, 

 vitulinus, 

 angularis, 

 crispatus, 

 fenestratus, 

 cingulatus, 

 cinguliferus, 

 subcarinatus, 

 torosus, 

 lyratus, 



M. cone ate natus, 

 granarius, 

 fimbriatus, 

 pulchellus, 

 aciculatus, 

 regius, 

 cristata, 

 ferrugo, 

 funiculus, 

 lubiosus, 

 pinnatus, 

 pictus, 



2 fossil species. 



Triton. Shell oval or oblong, channelled at the base; 

 ternate, or rare, or nearly solitary, and never forming a 

 aperture oblong. An operculum. 



varices either al- 

 longitudinal row: 



variegatum, 



nodiferum, 



australe, 



larnpas, 



scrobiculator, 



Splengleri, 



corrugatum, 



succinctum, 



T. pileare, 



' lotorium, 



' femorale, 



' pyrum, 



' cynocephalum, 



' tripus, 



' canaliferum, 



' retusum, 



T. clavator, 



' tuberosum, 



' vespaceum, 



' chlorostomum, 



' anus, 



' clathratum, 



' subdistortum, 



' cancellatum, 



T. maculosum, 



' clandestinum, 



' rubecula, 



' cutaceum, 



' dolarium, 



' tranquebaricum, 



' undosum. 



ALATA.— Three Genera. 



Shell with a more or less elongated canal at the base of the aperture, the 

 right lip of ivhich changes its form tcith age, and has a sinus at the lower part. 



Rostellaria. Shell fusiform or subturreted, terminated by a beak- 

 shaped canal; right lip entire or toothed, more or less dilated with age; with 

 a sinus contiguous to the canal. 



R. curvirostris, R. pespilicani, R. cancellata, 3 fossil species. 



' rectirostris, 



Pterocera. Shell ovate oblong, ventricose, terminated at the lower part 

 by an elongated canal; the right lip dilated by age into a digitated wing, with 

 a sinus towards the base. Spire short. 



P. truncata, 



' lambio, 



P. millepeda, 

 ' pseudoscorpio, 



P. scorpio, 

 ' aurantia, 



P. chiragra. 



Strombus. Shell ventricose, terminated at the base by a short, notched, 

 or truncated canal; right lip dilated by age into a simple wing, lobed or ere- 



