6o6 REPORT OF NEW JERSEY STATE MUSEUM. 



Pleon. Abdomen. 



Pleopod. Swimming- foot; as first to third pairs of appendages to metasome. 



Pleura. Downwardly directed lateral processes of abdominal segments, as in 

 crawfishes. 



Plica. Fold. 



Plicated. Folded or plated. 



Plumose. Feathery. 



Podobranchial plume. Appendage attached to legs of trnnk, as in crawfishes. 



Podomere. Limb segment. 



Pollex. Thumb. 



Polygonal. A figure with many angles. 



Porose. With small pores. 



Post-abdomen. Last portion of abdomen. 



Post-anal plate. Plate behind vent. 



Post-cephalic. Behind head. 



Predaceous. Living by prey. 



Prehensile. Adapted to seize. 



Prehension. Taking hold. 



Preocular. Before the eyes. 



Primordial. First in order. 



Proboscis. Trunk of usually protruding feeding-organ. 



Proctodccuiii. Hind section of alimentary canal, or so much of whole intes- 

 tine as formed at aboral end by ingrowth of ectoderm. 



Propodus. Fore-foot. 



Prosoina. In barnacles that part of body situated immediately behind point of 

 attachment of body to shell on rostral side. 



Prostomium. Region before mouth in the embryo. 



Protopodite. First and second joints of an appendage. 



Protuberant. Swelling. 



Proximal. Nearest, basal. 



Pterygostoniial. Flaring anterior edges of carapace when these turn forward 

 in front of bases of limbs, parallel with each other and with axis of 

 body. 



Pubescent. Downy. 



Pyriform. Pear-shaped. 



Radii. Streaks or lines. 



Raptorial. Rapacious. 



Rectangular. Having right angles. 



Renal. Pertaining to the reins or kidneys. 



Reniform. Kidney-shaped. 



Reticulate. Like net-work. 



Retractile. That which may be drawn in. 



Rhipidura. Hind pair of pleopods. together with telson, as in macrurans. 



Rhomboidal. An oblique-angled parallelogram. 



Rostrum. Large median spine produced forward on head. 



Scaphognathite. An appendage of second maxillje. 



Sclerite. Any separate skeletal element or definite hard part of the arthropod 

 integument. 



