28 CRETACKOUS GASTROPODA 
WW. APORRITAIS, da Costa, 1778. 
1. Arponrrmaris AnrraLroonnnsis, Stoliceha. Pl. TT, Mig. 1. 
Ap. testa acute-ovata, anfractibus septlenis, convewis, minute cancellatis ; ultimo 
spina eltiore, supra medium acute-, infra sub-carinato, spiraliter striato ; apertura an- 
gustata ; canali anteriore brevi, posteriore spire usque ad apicem decurrente ; labro 
parumn expanso, digitato (2), ad marginem crassiore, reflewo, extus acuto. 
Shell oval, pointed on each end, composed of seven convex volutions, which are 
ornamented with spiral and slightly curved transversal strive, the latter being some- 
what stronger, The last whorl is higher than the spira, inflated and provided above 
the middle with a stronger and below it with a smaller keel, both of which form 
probably small points or digitations on the outer margin of the aperture; spiral 
stir ave numerous above and below the keels, between them only one is present. 
The anterior canal is short pointed, much thickened internally and slightly bent 
inwards ab the point of termination, ‘The aperture is very much narrowed by the 
thickness of the lips, as is generally the case in other species of this genus, 
The outer lip is nob much expanded, terminating in one or more probably in 
two points; its margin is somewhat reflected, showing a slight sinus near the 
anterior canal; the posterior canal is prolonged up to the apex of the spire being 
annexed to the proyious yvolutions. 
Locality, Comarapolliam near Ootacod : the figured specimen is unique, and 
unfortunately little portions of the exterior margin of the aperture have been 
lost in preparation; the extent of the wing has been restored in its probable shape, 
Hormation, Arvialoor group. 
2, Aprornnmats snountrora, Jord. sp. Pl. IT, Bigs, 2—4, 
1846, Roalellaria aeowrifera, Morboa, Trans, Gool, Soe, Lond, VIT,, p. 128, PL 18, Mig, 17. 
L850, Fr Fe D'Ovb,; 161, Gladius id, Gabb; 1864, Aporrhata id, Pict, ob Camp. 
Ap, testa spire elongata, turrita, anfractibus nwnerosis, ad medium subangulatis, 
conveais, costulis transversalibus spiralibusque ornatis tisque plus minusve granulosis ; 
ultimo ad medium carinato, subinflato; labro in alam angustam uncinatam, postice 
curvatam exvtenso ; apertura angusta, interne callosissina, laevigata ; labio accumulato, 
crasso 3 canali antico atque postico brevi. 
Spiral anglo 25°—28,° subural angle 8°10", 
A. turveted shell consisting of numerous whorls, which are more constricted on 
the upper than on the lower suture and ornamented with transverse and spiral rib- 
bines. On tho wppermost whorls the transverse ribs are ustially much stronger, 
being slightly curved and evossed by tine spiral clovated striv. These latter increase 
on the next whorls much more rapidly in stroneth than the former, and being elevated 
on erossing these they easily produce the appearance of continued rows of tubercles, 
When at the same timo the transversal ribs become somewhat obliterate, these tuber- 
cles appear more isolated. There is nearly every possible transition to be observed 
bowoen the continued and smooth ribs and single isolated rounded tubercles. The 
