224 



STALK-EYED CRUSTACEA. 



a strong lens 3 on the following pairs of limbs this 



little vestige 



of the outer 



branch becomes somewhat larger (see Plate LIY., Fig. 1'')^ but still remains 

 a mere rudiment of the part as developed in P. armujer. 

 Lengthy 31 mm. 



Station 2637 Hydr, 700 fathoms (tow-net). 1 male. 



The sounding at Station 2637 is 773 fathoms. The Tanner net was 

 towed at 700 fathoms for twenty minutes^ but it came up open all the w^aj 

 to the surface. 



SCOLOPHTHALMUS Fax. 





H 

 "I 



Bull. Mus. Comp. Zool., XXIV. 219, 1893. 



r 



Integument membranaceous. Carapace small, leaving the last two tho- 

 racic segments exposed; produced in front to a spiniform rostrum, and 

 armed with a pair of antennal, and a pair of branchiostegal spines ; cervical 

 sulcus distinct, with a linguiform dorsal area behind it. Abdomen slender, 

 subcylindrical, sixth segment the longest. Telson broad, apex truncate, not 

 incised. Eye-stalks transformed to sharp spines, visual elements absent. 

 Peduncle of first pair of antennae robust, long, much exceeding the peduncle 

 of the second pair of antenna), and reaching nearly as far forward as the tip^of 

 the scale of the second antenmB; the three segments subequal. Peduncle 

 of the second pair of antcnniB rather short and slender; scale much longer 

 than the peduncle, narrow, tapering at the distal end, proximal fourth of 

 outer border smooth, naked, terminating in an angle which bears a strong 

 spine-like seta; the rest of the outer border of the scale is fringed with hair- 

 like setse like the inner border. Mandibular palp stout, long, reaching be- 

 yond the middle of the peduncle of the first pair of antenn^B ; first segment 

 short, second segment very long, third segment narrowly oblong, one half as 

 long as the second segment. Second maxilla? with inner basal part ex- 

 panded, three lobed, terminal segment expanded at the distal end, trian- 

 gular; scaphognath rather small. Maxillipeds short, broad, third segment 

 very short, fourth, fifth, and sixth segments about equal in length, seventh 

 segment small and armed at the tip with one or two strong stiff setas ; the 

 inner borders of the three antecedent segments also bear a few setx^ ; the 

 sixth (penultimate) segment is broad and triangular; there is no porrect 

 internal lobe to the maxilliped, such as found in some of the allied genera; 

 neither is there any exopod, but the basal segment bears a long, well devel- 

 oped epipod. The first pair of legs (gnathopods) are of moderate length; 



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