23 



MONOGRAPH OF THE GENUS 

 STRUTHIOLARIA. 



Char. Gen. Molluscum marinum ; testa tuirita, ovali, ventri- 

 cosa ; anfractibus plus minusve angulatis ; apice obtuso ; labio 

 interno calloso, oblique elongato; labio externo crasso, sub-reflexo, 

 sinuoso; supra infiaque emarginato, in medio prominente ; canali 

 antico brevi, indistincto, minime profundo. 



Turrited. ventricose, oval : whorls more or less angulated ; apex 

 obtuse; inner lip callous, obliquely elongated, so as to form a sort 

 of obtuse beak at its union with the outer lip, behind this the canal 

 is short and shallow, the outer lip is thickened and sinuous, 

 receding at each extremity, and produced into a prominent lobe at 

 the centre. We regard the sinus near the canal as connecting this 

 genus with the Strombidae. 



DESCRIPTIONS. 



Sp. 1. S. straminea. (pi. v. f. 16, 18, 20.) Murex stramineus, 

 Gmel. Str. nodulosa. Lam. 



T. crassa, sph'aliter striata, flammulis undatis, fulvis, picta ; 

 anfractibus angulatis, ad angulum nodulosis ; apertura sub- 

 quadrata, margine crasso. 



This well known species has the whorls angulated, and, when 

 full grown, has the prominent lobe in the outer lip thick ; the 

 nodules on the angle of the whorls are triangular and large. 



New Zealand. 



2. S. inermis. (pi. v. f. 12, 13, 19.) Sow. Zool. Journ. ? 



T. brevi, spiraliter striata ; anfractibus rotundato-angulatis, 



ad angulum minute nodulosis ; apertura sub-quadrata, margine 

 angustata. 



Short, spirally striated ; with the angle of the whorls rounded 

 and beaded ; aperture nearly square, with the inner and outer lips 

 narrow. 



3. S. gigas. (pi. v. f. 17.) nobis. 



T. S. straminese simillima, sed majori ; angulo anfractuum 

 rotundato, nodulis minoribus ornato. 



A large shell, resembling S. straminea in general character, 

 but having the angle of the whorls rounded, and the nodules 



