TEREBRA. 



Plate XIII. 



Species 52. (Fig. a, b, Mus. Cuming.) 



Terebra triseriata. Ter. testa prcelongd, gracillimi, 

 fulvo-albidd vel slramined, anfractibus numerosissimis, 

 plano-concavis, spiraliter liratis, interdum concentric^ 

 granoso-decussalis, superne grants amplis biseriatim 

 gemmatis, inferne serie unicd minore, anfractu ultimo 

 ad basin plus minus angulato ; aperturd pared, colu- 

 mella con torto-recnrvd. 



The three-gikt Terebra. Shell very long, very slen- 

 der, fulvous-white or straw-colour, whorls very nu- 

 merous, flatly concave, spirally ridged, sometimes 

 concentrically grauosely decussated, beaded round 

 the upper part with two rows of large grains, round 

 the lower with a single smaller row, last whorl more 

 or less angled at the base ; aperture small, columella 

 twistedly recurved. 



Gray, Pro. Zool. Soc. 1834, p. 61. 



Had. Island of Ticao, Philippine Islands (in coral sand at 

 a depth of six fathoms) ; Cuming. 



We have adopted M. Deshayes' T. pralonga from Port 

 Curtis, Australia, but have much reason to suspect that it 

 is a local variety of the T. triseriata. In arranging the 

 types side by side it is impossible to draw a line between 

 them. Those of larger size and darker colour, from 

 Australia, in which the sculpture is more developed, are 

 assigned to T. pralonga ; while the Philippine forms, of 

 more delicate and slender growth, more concavely flattened, 

 with the granulated sculpture more obscure, agree with 

 the originally described T. triseriata. 



Species 53. (Mus. Cuming.) 



Terebra Foutunei. Ter. testa elongato-turrild, gracili- 

 pyramidali, Candida, anfractibus subconvexis, superne 

 sulco pertuso divisis, concentrice valide costalis, iuler- 

 siitiis liris spiralibus clathratis, suturis profundis ; 

 aperturd parvd, columella subproditctd et coutorto- 

 recurvd. 



Fortune's Terebra. Shell elongately turreted, some- 

 what slenderly pyramidal, white, whorls slightly con- 

 vex, divided at the upper part by a pricked groove, 

 concentrically strongly ribbed, interstices latticed 

 with spiral ridges, sutures deep ; aperture small, co- 

 lumella somewhat produced and twistedly recurved. 



Deshayes, Journ. de Conch. 1857- 



Hob. China Seas ; Fortune. 



This shell, collected by the well-known traveller after 

 whom M. Deshayes has named it, is unique in the collec- 

 tion of Mr. Cuming. Its slender pyramidal form and 

 varicose plan of sculpture render it a very characteristic 

 species. 



Species 54. (Mus. Cuming.) 



Terebra trochlea. Ter. testa siibnlato-lurrild, ad ba- 

 sin subventricosd, albidd, spadiceo multo tinctd et 

 marmoratd, ad marginem punctulatd, anfractibus lalis, 

 planiusculis, superne sulco lato impresso divisis, deinde 

 angulato-plicatis ; aperturd ovald, subeffusd, columella 

 arcuatd, obesd, parum contortii. 



The pulley Terebra. Shell subulately turreted, some- 

 what ventricose at the base, whitish, much stained 

 and mottled with fawn, faintly dotted at the margin, 

 whorls broad, rather flat, divided at the upper part 

 by a broad impressed groove, then angularly plicated; 

 aperture ovate, somewhat effused, columella arched, 

 stout, but little twisted. 



Deshayes, Journ. de Conch. 1857. 



Bab. Zanzibar. 



Another very characteristic species, marbled with fawn 

 upon a white ground, leaving the white in a double row 

 of faint spots. The groove encircling the upper part of 

 the whorls is unusually broadly impressed. 



Species 55. (Mus. Cuming.) 



Terebra evoluta. Ter. testa subulato-turritd, livido- 

 cinered, costis granisque albidis, ad marginem fusco- 

 rufo punctata', anfractibus plano-convexis, ad marginem 

 granaiis, deinde concavo-sulcatis, delude angulate pli- 

 cato-costatis ; aperturd oblongd, columella subrectd. 



The unfolded Terebra. Shell subulately turreted, 

 livid-ash, ribs and grains whitish, dotted at the mar- 

 gin with fuscous-red, whorls flatly convex, grained at 

 the margin, then concavely grooved, then angularly 

 plicately ribbed ; aperture oblong, columella nearly 

 straight. 



Deshayes, Pro. Zool. Soc. 1859, p. 292. 



Hab. Japan. 



A much less satisfactory species than either of the last 



May, 1860. 



