GASTROPODA. 61 



B. ALATA. 



Family: STROMBID^. 

 Genus: PUGNELLUS, Conrad. 



PuGNELLTJS CRASSicosTATUS, spec. nov. PL XVI. fig. 3-3a, 4-4ia. 



The shell is fusiform, accuminate at each end, and consists of five or six volu- 

 tions, forming rather a low spire ; the last whorl, which is ventricose, occupies at 

 least three quarters of the total height of 45 mm. and terminates in a tolerably- 

 long canal. The outer lip is much thickened, and expanded into a roundish wing 

 which is bent somewhat backwards. The ornamentation consists of strong, rounded 

 S-shaped ribs on the last whorl, which begin near the suture and disappear about 

 half way across the whorl. 



Aperture scarcely seen, apparently longitudinal and narro^' 



Locality and stratigrapMcal position.— M.az&r Drik, horizon 8. 



Remarks. — Although this form is pretty common, there is only one specimen 

 which has the shell suflBciently well preserved, to show the wing-like expansion of 

 the last whorl, and the strong rounded outer lip. All the others are casts which 

 are, however, easily recognizable by the strong transverse ribs ia the upper half of 

 the last whorl. 



This form is very closely related to Pvgnellus uncatns, Forbes sp., from South- 

 ern ladia ; in fact, I first thought the two forms to be identical, but on oomparisoa 

 with Stoliczka's originals I find that Pugnellus uncatus has a larger number of 

 more delicate ribs on the last whorl, and that the anterior canal is much shorter 

 than in Pugnellus crassicostatus. Whether the Baluchistan form attains a larger 

 size than PM^«e/i««s MWC«#MS cannot yet be decided, but it, appears to be the case. 

 The characters aboveraentioned are, however, sufficient to distinguish both species, 

 notwithstanding their close relationship. 



Pugnellus digitatus is easily distinguished by the horizontal ribs on the last 

 whorl. 



Pugnellus digitatus, spec. nov. PI. XVI. fig. 5-6a, 6'6a, 7. 



The shell cannot have been less than 50 mm. in height, and had apparently 

 an ovoid shape; the short spire is turreted ; the last whorl, which occupies pro- 

 bably a little more than three fourths of the total height, is ventricose, and accu- 

 minate towards the anterior end. Suture sharp and deep. The ornamentation con- 

 sists of a sharp median keel, and very delicate, regular, revolving striae on the spire. 

 On the last whorl about ten sharp revolving keels appear, which apparently ex- 

 tended to the outer lip. Interstices on the keel are covered with numerous and very 

 regular, delicate, revolving striae, which are crossed by fine longitudinal striae of 



