CRUSTACEA MALACOSTRACA. II. 13 



again as the lower margin of the ischium. Tlie chela almost four times as long as broad, with the 

 posterior margin slightly concave; the movable finger half as long again as the front margin of the hand. 



Thoracic segments (figs. 2 a and 2b) a little more slender than in A.vicinus; second segment 

 as long as the third. Five posterior segments with their anterior lateral processes in the main shaped 

 as in A.vicinus^ excepting that their distal part is more slender and generally more produced; a lateral, 

 sharp, triangular protuberance in front of the insertion of the legs on the four posterior segment.s. — 

 Second pair of legs (fig. 2d) a link- more slender than in A. viciiiits; fifth joint slightly longer than 

 the .sixth and as long as the fourth; second joint with a strong spine on the distal lower angle; 

 fourth joint with a long spine both on the upper and the lower distal angle; fifth joint with a term- 

 inal upper spine and two strong and distant spines on the lower margin; si.xth joint twice as long as 

 broad; with two spines above and six below; seventh joint with a minute tooth below at the middle. 

 Seventh pair of legs (fig. 2e) with second joint nearly five times as long as broad; the following joints 

 are rather slender; sixth joint twice as long as the seventh which is nearlj- as long as the claw. 



Abdomen (fig. 2b) differs somewhat from that in .i. viciiiiis. The lateral processes of the five 

 anterior segments are long, distally more slender and directed more obliquely backwards than in that 

 species. Sixth segment a little less than the combined length of secoiul lo fifth segment, scarcely 

 less than three times as long as broad at the middle and with six pairs of lateral setse originating 

 from minute tubercles. — (Uropods lost). 



Length of the largest specimen, a female with small nuirsupial lamellae, 10 nnn. 



Remarks. This species is intermediate between the two preceding more robust forms, 

 .l.spiiiosus and A.vicinus, and the two following very slender species. It is more similar to the latter 

 forms bv the slender chelae, but differs strongh- from these and is rather allied to the two first-named 

 species by the long and strong lateral processes on the abdomen, the serrate proximal half of the 

 inner margin of first antennular joint, etc. 



Occurrence. The "Ingolf has taken this species at two deep-sea stations: 

 Davis Strait: St. 24: Lat. 63°o6'N., Long. 56°oo' W., 1199 fm., temp. 2.4°; 2V2 spec. 



Denuuuk Strait: St. 11: Lat. 64° 34' N., Long. 31° 12' W.. 1300 fm., temp. 1.6°; 2 badly preserved spec. 



4. Apseudes gracilis Xorm. & Stcbb. 



(PI. I, figs.3a-3d.) 



1886. ^Ipscndis gracilis Norman & Stebbing, Transact. Zool. Soc. London, Vol. XIL Pt. IV, p. 95, PI. XX. 



Sub adult Female. As it disagrees with the description and figures of the English authors 

 in some particulars, the more essential features may be mentioned. 



The eve-lobes (fig. 3 a) have the outer distal angle produced in a thin, moderately short process 

 directed nearly forwards. The lateral processes somewhat small, but otherwise shaped and directed 

 about as the eye-lobes. The surface of the carapace has no transverse furrow. 



Antenuulic (fig. 3a) .somewhat short; the first joint somewhat short, about two and a half 

 times as long as the second, without serration on the iimer margin; the outer flagellum 13-jointed. a 

 little shorter than the sum of the two proxiuuU i)eduucular joints and four times as long as the .short, 



