/. Starkie Gardner — ' On the Gault Aporrhdidce. 295 



Kegis, and Cambridge, and in the Gault of Folkestone; it would 

 therefore appear to have a wide range. 



Aporrhais globulata, Seeley. 



This shell is described at length by Professor H. G. Seeley in the 

 Annals and Magazine of Natural History for April, 1861. It occurs 

 in the Upper Greensand of Cambridge and Ash well, and resembles 

 those previously described in most particulars, but is of smaller size. 



Apporhais oligocrtla, 1 Gardner. PI. VII. Fig. 7. 



Description. — Shell broad and ovate ; spire short and obtuse, with 

 five very angulated whorls, the last being equal in depth to the other 

 five. All the whorls possess two strongly-developed keels ; though 

 the anterior keel is hidden by^ the suture on all but the last whorl, 

 on which both keels are particularly distinct. The whorls are finely 

 striated spirally; on the body-whorl there are six striae above the 

 keels, three between them, whilst anteriorly it is strongly striated to 

 the canal. The carinas are extended into digits, which support an 

 expanded lip, continued and attached to the spire up to the apex. 

 The canal and digits of the specimens examined are short, and the 

 outline of the lip is angular. It is a much larger shell than any of 

 those described as belonging to this group. 



History. — As stated in the March Number of this Magazine, page 

 124, there is a specimen of this shell named R. Mailleana in the 

 D'Orbigny collection at the Jardin des Plantes. This must, how- 

 ever, be an error, as neither the description nor figure in the Terrains 

 Cretaces resemble it. 



Locality. — Grey Chalk of Lyddenspout, between Folkestone and 

 Dover. 



Apporrhais paohtsoma, 2 Gardner. PI. VII. Fig. 8. 



A small ovate shell, composed of three or four inflated whorls and 

 an expanded wing. The body-whorl is very large in proportion to 

 the whole shell, is rounded, and without carinas. The spire is 

 depressed, and the whorls inflated and keel-less. The body-whorl 

 has about fifteen strise, which seem to be finely tuberculated. The 

 columellar lip appears to have been very much inerusted. The aper- 

 ture is crescentic, and the outer lip is developed into two short 

 canaliculated spines, and is terminated anteriorly and posteriorly by 

 rather short and slightly recurved canals, the posterior one being 

 attached only to the body-whorl. In the young state the shell would 

 resemble a globose form of Acteon. It differs from all other 

 Aporrhaidee. 



Locality. — Grey Chalk of Lyddenspout, where it is rare. 



Group 4. — Aporrhais Eobinaldina, D'Orb. PL VII. Figs. 11 and 12. 

 Description. — Shell elongated, conical, spire composed of about 

 eight rather inflated whorls, terminating apically in an obtuse point. 

 The apex under an inch-power microscope is seen to be flattened, 

 the flat region being composed of three inflated, turbinated whorls. 

 1 From bXiyos little, xetAos a lip. 2 From irdxos thick, aSi/j.a. 



