1598 THE VOYAGE OF H.M.S. CHALLENGER. 



The following account accompanied the drawings : — 



" Amphipoden No. \a. Cf. Oxycephalns'piscator, M. Edw. 



Tenerife — St. Thomas. (Earn. Typhidse. Trib. Hyperinaj). 



Lat. 21° 38' N. Hartnack 1/4. 



Long. 44° 39' W. Fig. 1. Eopf des ?. 



Temp. d. Oberrl. 22 - 2 C. a. vordere Antennen 



4 Marz 73. ot. Otolith. 



Fig. 2. Kopf des J . 



a. vordere Antenne ; 

 x. Schaft 

 ij. Glieder der A. 

 6. hintere 4gliedr. Ant. 

 Hartnack 1/7; 

 Fig. 3. Kristallatabchen. 



Fig. 4. Der dem Gehirnganglion (ce) aulliegende 

 Otolith (ot) mit seinem Nerven." 



It may be presumed that at least fig. 2 belongs to the genus Leptocotis, but to 

 which of the specific names it should be assigned cannot be decided from the figure of 

 the head alone. That which v. Willemoes Suhm designates as the shaft or peduncle 

 of the upper antennae includes what is here considered to be the first joint of the 

 liageiluni, the letter x in the figure being at the almost monstrously up ward -produced 

 apex of that joint. 



Leptocotis mindanaonis, n. sp. (PI. CCIV., C). 



Head as long as the person and first four segments of the pleon, the neck narrow, 

 ocular region dilated, rostrum curved, acute, narrowly elongate, yet not nearly so long as 

 the remainder of the head, with a line of orange spots along each side, its margins a little 

 serrate near the eyes, smooth near the apex ; the third segment of the pleon with the 

 postero-lateral angles acutely produced, the first and second having these angles squared; 

 the coalesced fifth and sixth segments considerably longer but very little wider than the 

 telson. 



Upper Antennie. — The first joint of the flagellum considerably longer than the small 

 two-jointed peduncle, its upper margin carrying four sets of filaments ; the two terminal 

 joints minute. 



The Gnathopods nearly as in Oxycephalus longiceps, Claus, but with the wrist in 

 the second pair less dilated, longer in proportion to the breadth, and the spine-like apex 

 of the process not nearly reaching the apex of the hand. 



First and Second Perseopods with slender joints. 



Third Perieopods. — The side-plates with a short and narrow inner process, not of 

 uniform breadth. The branchial vesicles with a constriction near the narrowed apex. 

 The first joint slenderly pear-shaped, the greatest width being near the base ; the third 



