Part II - State of New Jersey

GASTROPODATurritella marshalltownensis Weller 1907Plate 49, Figure 13; Plate 51, Figures 8, 10Ttirritella marshalltownensis Weller, 1907, p. 705, pl. 79, fig. 14.l'?irritella n~arshalltou~nensis Groot, Organist and Richards, 1954, p. 50.Desc:ription.-The dimensions of a specimen incomplete at each extremityand slightly compressed are: height, 60 mm.; maximum clia~neter,about 20 mm.; angle of divergence of the sides, about lZO, numberof volutions shown, 7. If the specimen were complete to the apical extremityit mould be 75 mm. or more in length, with 15 or more volutions.Suture moderately impressed, situated in the bottom of a broadly angular,revolving groove; the surface of the volutions moderately convex,their greatest diameter at or a little below the mid-height. Surfacemarked by about 12 tine, revolving costae, between which, in the lo\vcrhalf of the volutioii at least, there are usually alternate smilller ones.Shell substance thin. (\\'eller)Rungo En Now Jerscy-~~I\RSIIALTJ~'OWN : 28Range outside R'equ Jersey-Delaware.1:ype.-S\~edesboro, N. J.; NJS317'715.Turritella bakeri R~icliards 1943I'l~tc 44, Figure :ITtrrritclla bakeri Richards, 1943, p. 29, pl. 6, fig. 3.Doscription.-"Shell of medil~m size; spire high; whorls closelyappressed, suture faintly impressed. Each whorl is ornamented withconspicuoos spiral rills, bearing regularly spaced blunt nodes. Theinterspeces vary in width and beer fine threadlike secondary lincsusuallyfour to six. These secondary lines are of varying intensity,there usually being one or two in each interspace much more conspicuousthan the others. Aperture brolten in most specimens, but whcrcpreserved appears to be broadly subovate."Length (Type NJSM 10575) (incomplete) 35.0 mm.Length (paratype ANSI' 15680) (incomplete) 36.0 mm.Re111arks.-"Resembles T. alacneili Stephenson dredged from Banquereau,Nova Scotia, hut has the individual whorls less conspicuous,less prominent sutures, and a smaller number of secondary interspatiallines. It is equally close to T. thon~asina Stephenson, also from Banquercau.It is also related to T. shuleri Stephenson from the Woodbineformation of Texas. According to Dr. Stephenson, these nodose speciesof Turritella are not known later than the basal Upper Cretaceous.This is one of the commonest species in the siderite layer at theNEW JERSEY GEOLOGICAL SURVEY