1136 THE VOYAGE OF H.M.S. CHALLENGER. 



outer margin, besides some small spines at the apex, has a group at some distance below 

 it ; the third joint little longer than the first, its distal half beset with very numerous 

 spines ; the finger short, having at its blunt apex an ungual spine much longer than 

 the base, accompanied by several shorter spines on the inner part of the apex of the 

 finger. 



Pleopods. — Coupling spines small, slightly bent, with two retroverted hooks on one 

 margin and three on the other, the apical in each case included, the cleft spines five in the 

 series on one of the pairs, four on another ; the joints of the rami eleven in the inner 

 ramus, twelve in the outer. 



Third Uropods. — The peduncles broad and long with a small stout spine at the inner 

 apex, three along the middle of the distal border and several slender spines at the outer 

 apex; the rami short, the inner a narrow oval, with a small spine at the apex, the outer 

 broad near the base, narrowing distally, with an upturned spine at the apex, and two 

 retroverted spines close above it, the nearest having a very broad base. 



Telson almost an equilateral triangle, with two feathered setse at the apex, and one 

 near each margin higher up. 



Locality. — The specimen from which the figures were drawn had been mounted in 

 glycerine during the voyage, and was labelled as having been taken at the surface in the 

 Pacific, December 28, 1875. This date corresponds with Station 302, lat. 42° 43' S., 

 long. 82° 11' W. 



A second specimen, which also appears to belong to this species, was also mounted 

 during the voyage, this one in Canada balsam, and labelled as having been procured 

 also at the surface, " Philippines, off Tablas." 



Remark — Mr. Chilton : says of his Podocerus frequens — " This species appears 

 closely to resemble P. validus, Dana, from Rio Janeiro, but that species has the inferior 

 antennas ' very stout.' ' : He adds that " the process on the propodos of second gnathopoda 

 of male varies in size in different specimens, and is often longer and more distinct than 

 shown " in his figure. A specimen of the large second gnathopod of Podocerus validus 

 from New Zealand was kindly sent me for comparison by Mr. G. M. Thomson. 



Podocerus hoeki, n. sp. (PI. CXX.). 



Rostrum small, lateral lobes of the head not large or very prominent, rather acute 

 above ; the postero-lateral angles of the first three pleon -segments rounded, especially 

 those of the first segment, those of the third the least so. The animal everywhere 

 covered with little dots that are bright when seen with transmitted light. 



Eyes not perceived. 



1 Trans. New Zealand Inst., vol. xv. p. 85, 1883. 



