NO. 3570 PANDARIDAE — CRESSET 7 



Specimens studied. — All collections from Prionace glauca (Lin- 

 naeus). Twenty-six collections made in the western North Atlantic 

 Ocean between latitudes 30°N to 49°N and longitudes 60°W to 72°W. 

 Six collections in the Indian Ocean (0°58'N, 55°E; 0°14'S, 55°04'E; 

 6°37'S, 55°00'E; 34°32'S, 74°48'E; 33°11'S, 54°58'E; 02°06'S, 75°10'E. 

 Three collection in Pacific Ocean (3°18'N, 101°54'W; 1°00'S, 

 101°40'W; 9°56'N, 135°16'W). 



Female. — Body form as in figure 1. Length 8.2 mm and width 

 (measured at widest point) 4.4 mm based on average of 10 specimens. 



First thoracic segment fused with head. Dorsal thoracic plates 

 present on segments 2-4. Plates on segment 2 separate, extending 

 laterally beyond tip of plate of segment 3. Plates of segment 3 

 fused at base, divided by a broad median distal sinus in middle of 

 distal margin. Plates of segment 4 extending over the genital seg- 

 ment, fused, and with distal median sinus. Genital segment 1.8 mm 

 long and 2.7 mm wide. Abdomen 1-segmented and joined broadly to 

 genital segment ventrally. Abdomen covered by dorsal plate 

 (L8 by 1.5 mm), longer than wide, extending beyond tips of rami. 

 Caudal rami (fig. 2) long, slender, widest at base, tapering distally 

 (990/i by 228ju), bearing 4 short spines. Rami extend only to about 

 middle of abdominal plate. 



Oral area (fig. 3). Adhesion pads present at bases of first antennae, 

 second antennae, and maxillipeds. Pads also present at posterior 

 corners of cephalon. First antenna (fig. 4) 2-segmented. First 

 segment bearing 26 setae, 4 setae small and plumose, remainder stout 

 and armed as in figure. Second segment bearing 12 naked setae. 

 Second antenna (fig. 5) 3-segmented. Terminal segment bearing 

 large terminal spine and 2 setae. Mouth tube (figs. 6, 7) of usual 

 caligoid type. Labrum with pari of subterminal processes within tube 

 and fringed at its tip. Labium somewhat expanded at tip and with 

 fringe as in figure 7. Mandible (fig. 8) composed of basal podomere 

 bearing long slender shaft with serrate tip. Mandibular process ex- 

 tending within tube as in figure 6. First maxilla (fig. 6) 2-segmented. 

 Basal segment bearing 3 short setae. Terminal segment with small 

 seta and large terminal spine. Second maxilla (fig. 9) with 3 segments. 

 Basal segment unarmed. Second segment with 2 distal spines, longer 

 one fringed, shorter plumose. Terminal segment bearing large claw 

 with rows of spinules and apical patch of spinules. Maxilliped (fig. 

 10) 2-segmented. Basal segment stout, bearing an adhesion pad. 

 Terminal segment in shape of a claw, with 1 seta. Tip of claw bilobed, 

 with an adhesion area that, when closed, is in contact with adhesion 

 pad of basal segment. Legs 1-4 biramose with spine and setal formula 

 as follows: 



