THE FOSSIL STALK-EYED CRUSTACEA 71 



Eocky Point, 4 miles east of Yaquina City; Oligocene series; one 

 specimen. 



Probably near Yaquina ; Oligocene series ; one specimen embedded 

 in nodule. 



POKTUNITES INSCULPTA, new species 



Plate 17, figs. 1 and 2 



Description. — The dentate margins are considerably obscured in 

 the one specimen, holotype, in which they are at all visible (pi. 17. 

 fig. 2). The lateral teeth are five in number, the one at the lateral 

 angle having an indication, by a cross-section shown on the right 

 side of the impression, of a stronger tooth or spine than the others: 

 the penult tooth is acute and hooked forward, having a convex pos- 

 terior and a concave anterior margin; the first two teeth, that is 

 the one at the orbital angle and the next one appear to be narrower 

 than the others. The tips of the frontal teeth of the middle pair 

 are about 1 mm. apart. A median furrow extends from the margin 

 to the mesogastric region. The areolations of the carapace are very 

 prominent; the furrows about the cardiac and mesogastric regions 

 are notably deep ; that separating those two regions from each other 

 is less deep as is also the groove either side of the stalk of the meso- 

 gastric spatula. The blade of the spatula is raised above the stalk 

 and is a little longer. Cardiac region cordate, narrow behind, its 

 anterior transverse elevation being partially divided by a small an- 

 terior median depression. At the branchial angle between gastric 

 and cardiac regions there is a large, somewhat pointed tubercle or 

 boss. From it and separated by a shallow groove, begins the epi- 

 branchial ridge which arches forward and continues to the lateral 

 spine; metabranchial region high, forming a sort of ridge which 

 parallels the curve of the cardiac region and is separated anteriorly 

 by a slight furrow from the beginning of the epibranchial ridge; 

 the metabranchial ridge is accented inwardly by the deep trench 

 bordering the cardiac region, but outwardly it slopes gradually 

 downward and outward toward the postero-lateral margin. Both 

 epibranchial and metabranchial ridges form a boss at their inner 

 extremities. Hepatic region depressed. The elevated portions of 

 the carapace are granulate, coarsely so on the highest parts, the 

 depressions are smooth. 



The outer face of the chela (right major) is exposed (pi. 17, fig. 1) ; 

 lower margin sinuous. The palm is scarcely longer than its greatest, 

 or distal, height; it is much swollen especially in vertical direction, 

 and is covered with short transverse lines of punctae, but these do not 

 perhaps represent the outer surface; the upper margin is almost 

 straight, the supero-distal angle is produced and appears to be con- 

 siderably above the dactjdus. The fingers are about as long as 



