THE FOSSIL STALK-EYED CRUSTACEA 119 



nodules. The specimens are all in poor condition and the outer 

 layer absent. Holotype in Stanford University. 



Relation. — C. handonensis differs from those above described in 

 the short palm and very long, immovable finger and in the hollow at 

 the distal end of palm. 



CALLIANASSA PORTERENSIS. new species 



Plate 28, figs. 1-5 



Description. — Manus of major cheliped (pi. 28, figs. 1, 3, 4) with 

 outer surface very convex from upper to lower edge, unevenly con- 

 vex in a longitudinal direction, being thickest near the proximal end. 

 Lower edge straight, upper edge slightly convex, being depressed 

 distally owing to a dorsal flattening of the outer surface toward the 

 dactylus. Proj^odal finger curving gradually upward until near the 

 top where it is curved strongly yet still obliquely upward; this fin- 

 ger narrows regularly to near the tip. On the distal end of the 

 manus between the fingers and separated from the fixed finger by a 

 small U-shaped sinus there is a shallow lobe which is itself bilobed. 



X50 



Fig. 5. — Callianassa porterensis. Lower margin of left major propodds, holotypEj 



X 60 



the lower lobule bearing three or four marginal denticles, while there 

 may be two or three more denticles near the margin. Upper edge 

 entire, lower edge denticulate except near the proximal end, the 

 obtuse denticles arranged in pairs on shallow subtruncate lobes; the 

 denticulation is continued on the propodal finger. 



Surface nearly smooth; on paratypes a and &, which have the 

 outer layer of shell preserved, there are very low, oblong tubercles 

 in the lower, middle portion; and the presence of similar tubercles 

 on an inner layer is indicated by oblong light-colored spots of similar 

 shape. On the outer surface of the palm there is a row of punctae 

 close to the lower margin ; toward the finger on which the punctae are 

 continued, they become larger, further from the edge and more dis- 

 tant from one another. A submarginal row of a few large punctae 

 along the prehensile margin of the propodal finger (pi. 28, fig. 5). 

 A longitudinal row of two punctae just below middle of palm and 

 near its distal end. A solitary, subdistal puncta above the latter and 

 halfway between it and the upper margin. There are apparently 

 punctae below the upper margin but they are difficult to make out 

 on the outer surface; on the inner surface they are v small and 



