NO. 3570 PANDARIDAE — CRESSET 21 



Pandarus boscii Leach, 1816, p. 406; 1819, p. 535. — Gu6rin-Meneville, 1829- 

 1843, p. 41. — Burmeister, 1833, p. 331.— Desmarest, 1825, p. 339. — Kr0yer, 

 1837, p. 202.— Baird, 1850, p. 289. 



Caligus bicolor. — Lamarck, 1818, p. 137. 



Pandarus fissifrons. — Milne-Edwards, 1840, p. 470. 



Pandarus lividus. — Frey and Leuckart, 1847, p. 166. 



Specimens studied. — Three collections of females from Sgualus 

 acanthias Linnaeus caught at the following locations: in the North Sea, 

 eastern North Atlantic (53°04' N, 04°02' E), and off the coast of the 

 Netherlands. 



Female.^ — Body form as in figure 100. Total length (based on an 

 average of 2 specimens) 9.1 mm. Greatest width (measured at the 

 widest part of the cephalon) 3.8 mm. Cephalon only about one- third 

 body length, measuring 3.6 by 3.8 mm. Dorsal thoracic plates present 

 on segments 2-4. Plates of segment 2 short and not extending beyond 

 the posterior edge of plates of segment 3. Plate of segment 4 fully 

 exposed. Abdomen 1-segmented (see fig. 101) and covered by broad 

 dorsal plate. Caudal ramus (fig. 101) broad and much shorter than 

 in other species of genus. Caudal rami not obvious in dorsal view. 

 Each ramus armed with. 5 short spines. 



Oral area as in other members of genus. Since this species has been 

 well reported and amply figured in the literature, only salient features 

 included here. Second antenna (fig. 102) with short claw at tip 

 separated from last segment. In other species of genus these 2 

 elements are often fused. Maxilliped (fig. 103) with spatulate process 

 at tip of claw. 



Legs 1-4 biramose with spine and setal formula as follows: 



seg. 1 

 seg. 2 



Legs not notably different from other species of genus with exception 

 of reduction in number of spines on last segment of exopod of leg 2 

 (8 instead of 10) and elongated nature of exopod of leg 4. Legs 1-4 

 as in figures 104-107. Leg 5 (fig. 108) with outer single spine and 

 inner lobe with 3 spines. 



Color cream yellow to dark brown in pigmented areas. Cephalon 

 usually heavily pigmented with eye spots not separated and often 

 joined by median clear stripe extending distally. 



Male. — No material available for study. Apparently male of this 

 species is rare, as no collection examined contained one. It is interest- 

 ing to note that males of P. carcharini and P. niger (probably closely 

 related to P. bicolor) are unknown. 



T. and A. Scott (1913) illustrate male of P. bicolor and their figures 

 show it to be much the same as other males of the genus. 



