Part II - State of New Jersey

188 CRETACEOUS FOSSILSand the first tooth. The third tooth is placed at the widest part of thecarapace. It is directed obliquely forward and is more acutely triangularthan the first tooth. Tlic posterior m;~rgin of the third toothis distinctly concave and is provided ~~itli a carinate edge which becomescontinuous with the lateral edge of the carapace posteriorly.Cardiac field barrel-shaped, limited laterally by faint branchiocardiacgrooves which connect distally with a pair of deep thumbnail musclescars. Hepatic area slightly concave. >Ioutl~ficld nearly half as longas the carapace, its lateral cdgcs parallel and out\~ardly arcuate. \Vlienviewed from the ventral surface, the subhepatic f~~rrow and the promincntsubhcpatic carina estcrior to it are parallel to cach other and tothe lateral margin of the carapace. Surface of carapace minntely andevenly granulate.lleasurcmcnts of holotype: length 13> greatest \~idtli 9.6, frontoorbitalwidth 6 mm.Remarks.-Resenlbles A. clongota Milne Edwards (1862, p. 493;Brocchi, 1877, p. 4, pl. 29, figs. 4, 5) from the Cenomanian of France,hut is broader than that species, has the front truncate instead ofrounded and has the muscle-scars placed farther for~~ard.Distributioiu in New Jersey.-IIerchantville formation: GrahamBrick Company pits, Maple Shade.Oz~tside distr&t~tio?~.-Delannarc: Spoil bank north of C and DCanal, about 1/4 mile east of Summit liridge (type locality) ; Merchantvilleformation.ITo1otype.-ANSP19737 (Summit Bridge, Delaware).Raninella sp.Steinkerns of three carapaces (YI'PM 17904) from the \Voodburyformation at Lorillard, New Jersey, arc referable to Rnninella. Thelateral teeth and the details of the front are not knon~n, but the concaveposterolateral margins and the position of the muscle scars: wliiclireach nearly to the middle of the carapace, clearly distinguish thesespecimens from the preceding species, R. tridens. Although none ofthe specimens is well enough preserved to permit of aclcquatc sl~ecificdescription, a brief eharacterizatio~~ of the species may be desirable.The carapace is ohovate, widest at the distal third ant1 about one anda qnarter times longer than wide. The profile of the dorsal surface isnearly straight. The front is narrower than the posterior margin, andthe p~"~erolateral margins are concave. The distal ext,remities of themuscle sears almost reach to the midlength of the carapace. All threespecimens are enlhcdded in n~;~tl.ir by their ventral snrfaces. The largestexample is 22.1 mm. long and 145 mlo. at the greatcst \vidt,h.NEW JERSEY GEOLOGICAL SURVEY