366 Messrs. melvill .vxn staxdex ox [June 18, 



Eissoa (Maxzoxia) petroxella, sp. n. (Plate XXII. fig. 9.) 

 E. testa minutissima, pagodcformi, solidula, alba ; anfractihus 

 5-6, quorum apicalis crassus, albo-vitrccs, mamillatus, corteris 

 crassicostatis, apud suturas multum impresses, costis nodulosis, 

 prominidis, albis, interstitiis planatis ; apertura circulari, 

 peristomate incrassato, continuo. 

 Long. 2, lat. 1 mm. 

 Hah. Karachi. 



A very minute, elegant, white pagoda-shaped species, with 

 angled nodulous ribs, sutures much impressed, peristome thickened, 

 continuous, mouth circular. "We have provisionally Located it in 

 the subgenus or section Manzonia Brus., of which the European 

 R. costata Ads. is the type. 



Eissoa (Oxoba) delicata Phil. 



P.G-. Bushire. 



I. Karachi; also reported from Bombay (Rev. 8. D. Fair- 

 bank), not collected by Abercrombie. 



Eissoa (Oxoba) egregia A. Ad. 



P.G. Kishm Island. 5 fathoms, mud. 



Very beautiful, the whorls delicately longitudinally multi- 

 plicate. 



Eissoa (Alvaxia) alteata, sp. n. (Plate XXII. fig. 10.) 

 E. testa ovato-oblonga, solida, albo-calcarea ; anfractihus quinque, 

 apicalibus duobv.s leevibus, subpeUueidis, i/nehuis, (uteris tnibtu 

 amgulatvm prominvJis, apud suturas impressU, s/>iraliter 

 fortiter bi- in tdtimis quinquecostatis, undique alveolatis et 

 decussatis, interstitiis quaxlratis, profundw ; apertura rotunda ; 

 labro crasso, albo, e.vtus crenidatn ; columella incrassaia, />eris- 

 tomate continue. 

 Long. 3, lat. l - 25 mm. 



Bab. Angrias Bank, W.8.W. of Bombay {Capt. Tindall). 

 Also recorded from Quilon, further south, on the Malabar Coast. 



A stout, incrassate Alvania, the upper two (or sometimes three) 

 •whorls simple and smoothish, the remainder ruggedly angled, 

 uniformly cancellate, the interstices being deep and square ; outer 

 lip very thickened. Of the same character as the \V. Indian 

 A. didyma Watson, or the Australian A. austral is Sowb. 



Eissoa (Alyaxia) ixterfossa Nevill. 

 I. Indian Coast (G. Nevill). 



Eissoa (Altaxia) mahimexsis Melv. 



I. Bombay (Abercrombie). 



In G. Xevill's ' Hand-list of the Mollusca of the Indian 

 Museum, Calcutta,' p. 112, an Alvania sp. is marked with a var. 

 b. robv.sta Xevill, from Bombay, an unique instance, perhaps, of 

 the name of a variety being gazetted before that of its type- form. 



The nearest ally of this species is R. interfossa Xevill. 



