Geological Payers. 219 



of prominent spiral sculpture, straighter walls of whorls in vertical 

 direction, and its having a sutural canal. 



Specimen from the Quillayute formation. 



Unidentified specimens of this species were found in Arnold and 

 Hamilton's collection in the museum of the Leland Stanford Jun- 

 ior University from Purissima Rock, Punta, Anyo Nuevo, Califor- 

 nia; also in V. W. Bradley and L. D. Frink's collection from 

 Newyear Point (Capitola), California; and Doctor Smith has just 

 recently advised me that Doctor Arnold has identified the species 

 as above, from a location in the Santa Cruz quadrangle, age Mid- 

 dle Pliocene. 



Genus Neptunea Bolten. 



Shell elongate-ovoid, inflated, sometimes sinstral, with rather 

 short and sometimes bent canal; aperture oval. 



54. Neptunea maxfieldii n. s. Plate VI, fig. 54. 



Shell large, robust-fusiform, thick; spire elevated, subacute; 

 whorls five or six, convex, the convexity being more pronounced on 

 the upper part of the whorls; suture having a notched appearance 

 caused by the shell of the previous whorl overlapping it in saw-tooth 

 fashion, distinct, appressed; aperture oval- elliptical to subovate; 

 outer lip curved in and flattened at edge near suture in mature 

 specimens; inner lip incrusted; base of aperture where it meets the 

 canal broadly rounded; canal short, slightly curved backwards and 

 a little to the left; columella rough, twisted; surface smooth, with 

 the exception of faint spiral sculpture which shows principally on 

 the lower part of the body whorl, extending on to the external part 

 of the pillar; transverse lines are also seen on the more mature speci- 

 mens, but if they were ever prominent they have been weathered 

 away; color of shell reddish. 



Dimensions of largest specimen: Axial length, 70; lat., 47; aper- 

 ture, including canal, 51x27. 



This species differs from the Tritonidw in the less prominent 

 sculpture, especially the practical absence of the transverse lines 

 and the total absence of the nodes so characteristic of the latter; also 

 in the upper part of all the whorls being convex. Its shape is also 

 more that of Neptunea than of Cancillaria. 



The specimens representing this species were obtained at the 

 present mouth of Maxfield creek near Quillayute. 



542. Neptunea sp. 



A fragment of shell from the Quillayute (Pliocene) formation 

 proves to belong to Neptunea: but is too much broken to admit of 

 specific determination. 



