TRITON. 



Plate XIV. 



Species 52. (Fig. a, Mus. Metcalfe ; Fig. b and c, Mus. 

 Cuming.) 



Triton labiosus. Trit. testd ovato-fusiformi, ventricosd, 

 varice unicd aut nulld ; spird nunc abbreviatd, ob- 

 tusd, nunc elevatd ; anfractibus superne angulatis, 

 transversim striatis et liratis, /iris latiusculis, costis 

 longitudinalibus decussatis ; fused vel cinered, fusco- 

 tinctd et maculatd ; columella subexcavatd, alba ; 

 canali brevi. 



The full-lipped Triton. Shell ovately fusiform, ven- 

 tricose, with either one or no varix ; spire some- 

 times short, obtuse, sometimes elevated ; whorls 

 angulated at the upper part, transversely striated 

 and ridged, crossed with longitudinal ribs ; brown 

 or ash-colour, stained and spotted with brown ; co- 

 lumella somewhat excavated, white ; canal short. 



Wood, Index Testaceologicus, Supp., pi. 5. fig. 18. 

 Tritonium rutilum, Menke, Moll. Nov. Holl. 



Hab. West coast of New Holland ; Menke. Island of 

 Luzon, Philippines (found under stones at low wa- 

 ter) ; Cuming. 



I am much indebted to my worthy friend Prof. Menke 

 of Pyrmont for sending me a drawing of his Tritonium 

 rutilum ; I am unable however to maintain his specific 

 name, in consequence of having identified it with several 

 examples of the Murex labiosus of Wood. It is an ex- 

 ceedingly variable species, the spire being much more 

 elevated in some specimens than in others. 



Species 53. (Mus. Cuming.) 

 Triton rudis. Trit. testd ovato-fusiformi, varicibus 

 planulatis quinis senisve ; spird subacuminatd ; an- 

 fractibus transversim elevato-striatis, longitudinaliter 

 undulato-nodosis ; fulvd ; columella albd, subexca- 

 vatd, inferne subobsolete rugosd ; canali brevissimo, 

 recurvo ; aperturte fauce albd ; labro simplici. 

 The rude Triton. Shell ovately fusiform, with five or 

 six flattened varices ; spire somewhat acuminated ; 

 whorls transversely elevately striated, longitudinally 

 undulately noduled ; yellowish brown ; columella 

 white, slightly excavated, and rather obsoletely 

 wrinkled at the lower extremity ; canal very short, 

 recurved ; interior of the aperture white ; lip simple. 

 Broderip, Pro. Zool. Soc, 1833. 



Hab. Iquiqui, coast of Peru (found in mud and sand at 

 a depth of from six to ten fathoms, and in coarse 

 gravel at the depth of nine fathoms) ; Cuming. 

 This shell is exactly intermediate between Triton and 



Species 54. (Fig. a and b, Mus. Norris.) 



Triton acuminatum. Trit. testd subfusiformi, varice 

 nulld; spird acutissi?ne acuminata; anfractibus nu- 

 merosis, transversim elevato-striatis, longitudinaliter 

 costatis, costis subob/iquis, crebriusculis ; columella 

 subti/issiml' rugosd ; canali breviusculo, ascendente ; 

 aperturd parvd, rotunda ; labro intus denticulato. 



The acuminated Triton. Shell somewhat fusiform, 

 without any varix ; spire very sharply acuminated ; 

 whorls numerous, transversely elevately striated, 

 longitudinally ribbed, ribs somewhat oblique, rather 

 close; columella very finely wrinkled; canal rather 

 short, turned upwards ; aperture small, round ; lip 

 denticulated within. 



Reeve, Pro. Zool. Soc, 1S44. 



Hab. China. 



The Triton acuminatus is another very aberrant form, 

 though belonging to that interesting section of the genus 

 of which the Triton 7iiveus is the type. 



Species 55. (Mus. Cuming.) 

 Triton Tranquebaricus. Trit. testd ovato-fusiformi, 

 varicibus interdum tribus, interdum twllis ; spird 

 mediocri ; anfractibus liris subprominentibus cingu- 

 latis, liris caruleis aut fuscescentibus, scepe duplicatis, 

 plus minusve crenulatis et nodosis, remotiusculis, 

 strid unicd elevatd intercurrente ; columella rugosd ; 

 canali breviusculo ; labro intus dentato, dentibus 

 binis. 

 The Tranquebar Triton. Shell ovately fusiform, 

 with sometimes three varices, sometimes none ; 

 spire middling; whorls encircled with prominent 

 ridges, ridges bluish or light brown, often dupli- 

 cate, more or less noduled and crenulated, rather 

 distant, with a single raised stria running between 

 them ; columella wrinkled ; canal rather short ; lip 

 toothed within, teeth arranged in pairs. 



June 1844. 



