.SMITH: SOUTH AFRICAN MARINE SHELLS, WITH NEW SPECIES. Ill 



ellj arcuata, callo albo ifiduta. Longit. 47 ;//;//., diam, 20. Aj^cr- 



hira cum canali 25 longa, 6\ lata. 



Hal)., from the stomach of a fish cauglit in 40 fathoms ten miles 

 from Durban (Quekett). 



Very different from any known species and remarkable on account 

 of the nodules upon the middle or angle of the whorls. These are 

 ten in number upon the last whorl, large and white, with a brown 

 stain between them. The nodules become less pronounced upon the 

 upper part of the spire, being scarcely developed upon the three first 

 normal volutions. 



It is a more slender species than the Mediterranean E. cornea, hav- 

 ing a longer anterior canal and at once distinguished by the nodose 

 angle of the whorls. 



18. Tritonidea natalensis. (PI. I., fig. 23). 



Tritojiidea siihrnhiginosa Sowerby (nee Smith), Journ. of Conch., 

 vol. vii., p. 368, 1894. 



Testa ovato-fusiformis, spmiHtej' fo /titer sulcata et Ih-ata, periostraco 

 eras so olivaceo et piloso induta, infra periostracum dilute rttfescens, 

 circa medium anfr. tilti/ni albo zonata ; spira acuminata, ad apicem 

 mamillata ; anfractus 7, primus globosus, Icevis, tres sequentes coft- 

 vexiusculi, longitudinaliter oblique costati, et liris transversis quater- 

 nis, supra castas subnodosis, oniati ; penult, et ultinius costulis simpli- 

 cibus transnersis instructi, ifi ititerstitiis spiraliter tenuissime lirati ; 

 apertura elongata, inverse subpirifoimis, alba, longit. totius\(zquans ; 

 lahrum ad margi?iem tenue, extra leviter incrassatum, intus liris 

 brevibus novem {suprema cceteris majori), instructum ; columella 

 supra leviter arcuata, infra medium obliqua, et U7iiplicafa, siiperne 

 tuberculo elongato nninita, callo tenui circumscripto albo induta. 

 Longit. 22 ;//;//., diam. 11. Apertui-a 11 lo/iga, 4^ lata. 

 Hab., Durban (H. Burnup). 



The periostracum is thick, longitudinally striated, hairy, and quite 

 conceals the colour of the shell beneath. The last whorl has a slight 

 constriction at the upper part which j)roduces as it were a thickening 

 below the suture. In some specimens one or two slight tubercles are 

 observable near the so-called fold upon the lower part of the colum- 

 ella. T. subrubiginosa Smith, from Japan, is very similar, but smaller, 

 has more convex whorls, a thinner periostracum, and the longitudinal 

 cosloe continued on the upper part of the body-whorl, which lacks the 

 groove or depression which occurs in the present species. 



19. Nassa algida Reeve. (PI. I., fig. 17). 



Nassa algida Reeve, Conch. Icon., vol. viii., figs. 145a, 145b, 1853. 

 ffab., Moreton Bay, Australia (Reeve); Durban, Natal (H. Burnup), 



