MELVILL & SYKES : MA.EINE SHELLS FROM THE ANDAMAN'S. 221 



5. I^ASSA (Alectrton) papillosa, L. The largest of the genus, 

 connected with other, smoother, species through JV. seminodosa, A. Ad. 

 Distributed widely throughout the Eastern tropics. 



6. *Nassa (Alecteion) bifaria, Baird. Considered by Tryon 

 (Man. Conch., ser. i, vol. iv, p. 28) to be a "stumpy variety" of 

 N. hirta, an abundant East Indian and Polynesian species. 



7 Nassa (Hima) cribraria, Marrat. A prettily painted Nassa, 

 white, zoned with fulvous-brown. Three examples, exactly agreeing 

 with specimens before us, authenticated by Mr. Marrat. Allied to 

 N. concinna, Dunker, but smaller. We should not be inclined to 

 follow Tryon (Man. Conch., ser. i, vol. iv, p. 51) in considering it 

 a variety of N. sinu&igera, Ad. 



8. Nassa (Phrontis) Zaileistsis, Sby. Proc. Malac. Soc, vol. i, p. 160. 

 Var. Andamanica, nov. Pig. IV (p. 222). 



Nassa ovata, solida, stramineo-ochracea, apud apicem acuminata, 

 anfractibus 8, longitudinaliter costatis, costis papillosis, spiraliter lirato- 

 sulcatis, papillis obtusis, parum nitentibus, anfractu ultimo juxta 

 suturam papillose, infra profundi spiraliter sulculoso, delude longi- 

 tudinaliter costato, costis papillosis, ut supra, apertura ovato-rotunda, 

 nigro-fasciata, canali brevi, labro politissimo, extus trimaculato, 

 maculis fusco-nigris, intus denticulate, columella recta, paullum 

 plicata. Long. 18, lat. 10 mm. 



We have given a full description of this shell, at present deemed 

 a variety, since it is not improbable that in time to come, when 

 extensive suites, in various stages of growth, of both this and 

 N. Zailensis, Sby., have been gathered, the new form may prove 

 worthy of specific rank. 



The examples before us are of a thickened fusiform shell, spire 

 much attenuate towards the apex, upper whorls thickly ribbed, and 

 these ribs thrice sulcate, transversely, thus appearing gemmuliferous, 

 the last whorl is longitudinally ribbed, and obscurely spirally sulcate, 

 outer lip shining, very polished, enamelled callosity extending over 

 the columellar area to the sutures, not very thick, but white and 

 much glazed, the outer lip possessing, as in the type {Zailensis), two 

 or three black or fuscous bands, giving a very distinctive appearance. 

 Superficially it resembles N. venusta, Dunker, var. 



9. Nassa (Zeuxis) canaliculata, Lam. One most magnificent 

 specimen, much larger than usual, and with the outer lip in very 

 perfect condition, which we have placed in the National Collection. 

 It also occurs in the Pacific from the Philippines to Fiji. 



10. Nassa (Aciculina) maculata, a. Ad. Perhaps this would be 

 better included in Amycla, H. & A. Ad. The type came from the 

 Philippine Islands. 



11. Engi^sta elegans, Dunker, 1845 {=Ricinula fulclira, Reeve, 

 1846). Reeve probably altered the trivial name of this species on 

 account of the Ricinula elegans, Brod & Sby. (Zool. Journ., iv, p. 376). 

 This latter species, however, still remaining in Sistrum, it no longer 



