P Y R A Z U S . 



Genus TYRAZUS, Moiitfort. 



IWa siib/li(viatilis, davifonnis, venlricosa, snbpyramidalis, 

 cpidermkh tennl Indiila, varicibits paucis ; aperlurd 

 pi/riformi, supra ef infra canaliculata, lahro expanBO, 

 superne elecato, infra ante canalem, terminalem pro- 

 (htclo ; opercido corneu, rotmido, muliiyiirali. 



SlicU subfluviatile, club-sliapccl, ventricose, subpyrauiidal, 

 covered with a Ihin epidermis, varices few ; aperture 

 p\Tiform, with a canal above and beneath, outer lip 

 expanded, elevated above, produced in front of the 

 terminal canal beneath ; operculum horny, rounded, 

 multispiral. 



To the three species already kuown, from the Eastern 

 Archipelago and Australia, a very interesting one has re- 

 cently been added from New Caledonia. 



Species 1. (Fig. a, 6, c, Mus. Cuming.) 



Tykazus sulcatus. P^/r. testa veniricosd, gla.i(cd,fiisco 

 fasciald, longitndinalitur valide plicatd, spiraliler in- 

 ciso-sulcatd ; anfractibus subrotiindis, mediauis iiiflatis, 

 snturd excavatd ; aperturd pyriformi, supra canali- 

 ferd, antice in canalem rolundam iKrminaide, columelld 

 incrassatd, obscure biplicatd, labro expanso, elevato, 

 infra rotundntlin ante canalem prodiicto. 



The sdlcated Pyrazl's. Shell ventricose, glaucous, 

 banded with brown, longitudinally strongly plaited, 

 spirally giit with incised grooves; whorls rather 

 round, the central ones inflated, suture hollow ; aper- 

 ture pyriforni, with a canal above, terminating in a 

 rounded canal beneath, columella thick, obscurely bi- 

 plicated, outer lip expanded, elevated beneath, pro- 

 duced in a rounded form in front of the canal. 



Horn {M/irex snkaius), Mus. p. 320. 

 Miirex molluccauiis, Gmel. 

 Strombus Mangiornm, Schroet. 



Ilnb. China and Pliilippines. 



In many full-grown specimens of this shell the outer 

 lip is bent round, so as to form a junction with the inner, 

 thus crossing and partially enclosing the canal. 



Species 3. (Mus. Cuming.) 

 Pyrazus PALLi STRIS. I'yr. testa magna, pyrarnidali, fused ; 

 anfractibus reciis, lungitudivuliter pt/catis, s/iiraliter 

 dislanter sulcatis, interstitiis plants; aperturd sub- 

 quadratd, cunali bred, labro intra a)ite canalem pro- 

 ducto, uperculo anfractibus laqueatis. 



The marshy Pyrazus. Shell large, pyramidal, brown, 

 whorls straight, longitudinally plaited, spirally dis- 

 tantly sulcated, interstices flat; aperture subquad- 

 rate, canal short, outer lip produced in front of the 

 canal below, operculum with the whorls fluted. 



LiNNiEUS, Syst. Nat. 



CeritJiium, crassum, Lamarck. 



]Iab. East Indies, Australia, mouths of rivers. 



Species 3. 



Pyrazus Goukmyi. Pyr. testa curtd, ventricosd, solidd, 

 alba, pimmulis fuscis variegata, epidermide subviridi 

 indutd, spiraliter striata; anfractibus paucis, ultimo 

 magna, sutnrd distinctd ; aperturd rotunda, canali 

 tnbiformi, lahro expanso, infra ante canalem valide 

 producto, labia interna arcuato, supra calloso et ca- 

 ualifero. 



Gourmy's Pyrazus. Shell short, ventricose, solid, white, 

 variegated with brown flame-like markings, covered 

 with a greenish epidermis, spirally striated ; whorls 

 few, the last large, suture distinct ; aperture rounded, 

 canal tubular, outer lip expanded, much produced 

 below in front of the canal, inner lip arched, with a 

 callosity and a canal above. 



Crosse, Journ. de Conchyliologie, 3rd series, 1. 1. n. 2. 



Hab. New Caledonia. 



Species 4. 



Pyrazus semitrisulcatus. Pyr. tesld ventricosd, so- 

 lidd, glaucd,fusco fasciald, obscure sulcata, supra lon- 

 gitudinaliter plicatd ; anfractibus ultimis planulatis, 

 suturd excavatd ; aperturd subpyriformi, labro valide 

 expanso, infra rotundald, ante canalem producto, ca- 

 nali brevi, tubifonni, columelld obscure biplicatd. 



The half-sulcated Pyrazus. Shell ventricose, solid, 

 o-laucous, banded with brown, obscurely grooved. Ion- 

 gitudinally plaited above ; the last whorls smooth, 

 suture excavated; aperture subpyriform, outer lip 

 strongly expanded, rounded beneath and produced 

 in front of the canal, canal short, tubular, cohunella 

 obscurely two-plaited. 



Bolton, Cat. Conch. Coll. Yoldi, p. .57. 



Hab. Port Essington. 



The lower whorls of this shell are smooth, and in no 



part are the plaits and grooves so strong and deep as in 



P. sulcatus. 



Mav, 1865. 



