MELVII.L AND STANDEN : (iENUS SCALA IN THE PERSIAN GULF. 347 



apertura ovalo-rotufida, labro nmlfuin incrassato, ad bashn obscure 



subquadrato. 



Long., 375 to 4"i5. Zrt/., 2 to 2 '5 mm. 



Hub., Persian Gulf, Mussandam, 47 fathoms. Gulf of Oman, lat. 

 24° 58' N., long. 56° 54' E., 156 fathoms. 



This is one of the most distinct of the smaller species now being 

 differentiated. The lamellae are, under a strong power, seen to be 

 more or less fimbriolate, this being evidently caused by the spiral 

 lir?e showing so conspicuously at the points of junction. The outer- 

 lip is very much thickened in proportion to the size of the shell, and 

 towards the base is obscurely squarrose. Not infrequent. 



(OekKTi]ptos, charming). 



Scala townsendi sp.n. (PI. VII., fig. 14). 



6*. ^es/a ///siformi, delicata, alba., parum nitente, imperforata, anfractibus 

 odo, quorum tres apicales, vitrei, leaves, cceteris ad suturas impressis, 

 tiunidulis, vndique longitiidinaliter lamellatis, lamellis latis, supra 

 uncato-aculeatis, numero anfractum apud ultimiim tredecim, interstitiis 

 pulchr'e spiraliter striolatis, apertura rotunda., labro continue, crassius- 

 culo. 



Long., 5. Lat., 2 mm. 

 LLab., Mekran Coast, Charbar, 20 fathoms. 

 Very delicate, pure milky white in colour, with the not crowded 



longitudinal lamellae aculeate on the upper shoulder, just below the 



sutures. The whole surface is most beautifully spirally striolate, as in 



S. thelcteria, S. deifica, and S. laidlawi. 



Scala (Clathrus) aculeata Sowb. 

 P.G. Koweit, 10 fathoms. Maskat, 15 fathoms. 

 M.C. Charbar, 7 fathoms. 



I. Karachi, 3 fathoms, on muddy stones. Common at Bombay 

 (Abercroml:)ie, Townsend). 



Scala (Clathrus) clathrus L. 

 M.C. Charbar. 

 I. Karachi. 



Scala (Clathrus) gloriola M. & S. 



P.G. Gulf of Oman. Maskat, 75 fathoms. Also lat. 24° 58' N., 

 long. 56° 54' E., 156 fathoms. 



A species of very elaborate sculpture. 



Scala (Clathrus) malcolmensis Melv. 



P.G. Gulf of Oman: Malcohii Inlet (Kubbatt Ghazira), 24 fathoms. 



I. Karachi Harbour. 



A particularly interesting form, with winged, expanded lamellae. 



