Part II - State of New Jersey

about six (estimated) ; very slightly convex; sutures slightly impressed.Top portion of type not preserved. I'rominent lateral ribs on eachwhorl, much more eonspieuous on all except penultimate. Because ofthe incomplete preservation of the type, it is impossible to estimate thenumber of ribs. However, they are slightly closer together and apparentlymore numerous than in A. pontana Stephenson. Tbe bodywhorl is covered with conspicuous spiral ribs separated by interspacesof irregular width. No riblets were observed in the interspaces. Thecrossing of the spirals and growth ridges produces a semi-eaneellatedappearance, althougli this is less conspicuous than in A. pontana. Aperturenot visible. The outer lip is extended to form a lip-like structurewhich, unfortunately, is not perfectly preserved. It apparently hadmuch the shape of the outer lip of A. pontana. The shell is closely relatedto A. pontana Stephenson from Banquereau, Nova Seotia, buthas slightly coarser axial ribs, less caneellate appearance on the bodywhorl and outer lip and a less prominent suture. Length 39.0 mm.;greatest width (exclusive of outer lip) 16.0 mm." (Richards)Range in New Jerseg-RARITAN : 1Type.-Sayreville, N. J.; NJSRI 10448.Anchura mritanensis Richards 1943Plate 43, Figure 15~Lnchura raritunonsis Richards, 1943, p. 27, pl. 5, fig. 15.Description.-"Shell of medium size, spire elongate conical ; eightwhorls, moderately convex; suture deeply impressed; protoeonch notpreserved. Prominent ribs on each whorl, more conspicuous on thepenultimate and antepenultimate. Because of the lack of a perfectspecimen, it is impossible to determine the number of ribs. On thepenultimate whorl they are approximately 2 mm. apart. A fair traceof spiral lines can be seen on the body whorl. The outer lip was apparentlygreatly expander1 to form a wing-like structure, characteristieof the genus. Most of this outer lip has been broken away; however,notches where the lip was attached to the shell can plainly be seenon the left side of the shell. Length 41.0 mm. ; maximum diameter (exclusiveof outer lip) 16.0 mm." (Richards)Remarks.-"It differs from A. bakeri in its much coarser axial ribsand apparently larger outer lip (as indicated by the notches)."Stephenson (1954) regards this as identical wit11 his A. pontana.Rangc in New Jersey-RARITAN : laType.-Sayreville, N. J. ; NJSRI 10434. Sayreville, N. J. ; ANSP15676 (paratype).NEW JERSEY GEOLOGICAL SURVEY