DESCRIPTIONS OF SIXTY-EIGHT NEW SHELLS. 219 



Mr. Edgar Smith considers Cnoba egregia, A. Ad. (which should be removed 

 from that genus), the nearest approach to our shell, and suggests that it might, 

 at all events provisionally, be located in Aclis. In lip-characters it assimilates 

 this genus, while resembling in the decussating sculpture a Oirsotrema, e.g., 

 dentiscalpium, Wats. But perhaps the subgenus Censtantia of Scala is best 

 fitted for its reception, for it seems comparable with C. Standeni, Melv. °, also 

 from the Gulf of Oman, in more than one point. 



NASSA {ALECTRYON) H1MER0ESSA f, sp. n. (PI. C. fig. 7.) 

 N. testa minuta, ovata, albo-vitrea, delicata, apud basim et ssepe ad suturas 

 pallide stramineo-suffusa, vel zonata ; anfractibus 6 — 7, quorum 3| apicales 

 lseves, vitrei, spiraliter unicarinati, cseteris apud suturas gradatulis, longitu- 

 dinaliter arete lsevicostatis, interstitiia undique tenuiliratis ; apertura fere 

 rotunda, intus alba, labro incrassato, intus spiraliter striato ; columella 

 paullum excavata, canali brevissimo. 

 Long. 5, lat. 2 mm. 



Hab. Gulf of Oman, at several dredging-statiens in lat. 23° to 25° N., 

 long. 57° to 59° E. 



Depth ranging from 7 — 156 fathoms. 



We at first confounded this species with N. babylonica, Watson, and most 

 probably the latter does not occur in the Persian Gulf region. The present 

 species is locally very abundant, and the fine smooth ribs, small size, subpellucid 

 substance, and less graduate whorls will serve to distinguish it. 



TRITON1DEA SOWERBYANA, sp. n. (PI. C. fig. 8.) 

 T. testa ovato-f usiformi, solidula, epidermide setulosa tenuiter contecta, albida, 

 infra, juxta suturas et infra medium anfractus ultimi castaneo-zonata ; 

 anfractibus 8 — 9, quorum apicales 3£ pellucidi, Isevissimi, cseteris ventricosis, 

 multum apud suturas impressis, longitudinaliter costatis, costis crassis, nume- 

 rosis (ultimo anfractu apud 10), omnino spiraliter arctissime liratia ; apertura 

 rotundo-ovata, alba, labro arcuato, crassiusculo, intus albo, multicrenulato ; 

 columella recta, operculo corneo, tenui, nucleo apicali, canali bievi, paullum 

 recurvo. 

 Long. 31, lat. 18 mm. 



Hab. Gulf of Oman and Mekran Goast, especially between Gwadur and Jask, 

 from 25 — 30 fathoms, " usually occurring with Murex malabaricus " (F. W. T.). 

 Also lat. 25° 20' N., long. 58° 50' E., at 90 fathoms, in company with 

 Latirus pagodceformis, Melv., June 1903. 



This beautiful species was first pointed out to us as distinct by Mr. G. B. 

 Sowerby. It is near the old Buccinum ligneum, Reeve, = Tritonidea cecillei, 

 Phil. It differs in being of stouter build, with the whorls not so scalate. 

 There is likewise an affinity with T. erythrostotna, Reeve, but the lip is never 

 coloured in the slightest degree. 



• Ann. & Mag. Nat. Hist, sec 7, vol. iv, pp. 92, 93, pi i., tig. 11. 

 ■j- i/A.!fntis f pleasing. 



