14 STALK-KYED CRUSTACEA. 



breadth, 113.5 mm.; lengtli of rostrum, 22 mm.; length of rostral horns, 

 11 mm.; breadth between eyebrows, 38 ram.; length of cheliped, 156 mm. 

 (merus, 44.5 mm. ; carpus, 25 mm. ; propodus, 07 mm. ; dactylus, 25 mm.) ; 

 length of second leg (first auibulator\'), 195 mm. (merus, G2 mm., carpus, 

 32 mm. ; propodus, 40 mm., dactylus, 44 mm.) ; width of sternum, 72 mm.j 

 length of teLson, 8.7 mm.; width of telson, 16.5 mm. 

 Station 3355. 182 fathoms. 1 male. 



Family PARTHENOPID^. 



LAMBRUS Leach. 

 rails. Linn. Soc. London, XI. 308, 310, 1S13. 



Lambrus hassleri Fax. 



PMe III., Fig. 1, 1\ 



Bull. Mus. Comp. Zool., XXIV. 152, 1893. 



The carapace is from one and a third to one and two fifths times as broad 

 as long. A deep longitudinal depression separates the branchial from the 

 gastric and cardiac regions and another separates the hepatic and branchial 

 regions. The whole surface is tuberculous, granulated, and pitted. There 

 are three large tubercles on the gastric region, one median and two smaller 

 ones in a transverse line in front of the median. Three tubercles are found 

 on the cardiac region in the median line, the middle one the largest. On 

 the posterior margin there are three tubercles with smaller ones between 

 them ; the three larger ones are placed, one in the middle line of the cara- 

 pace, one on each side. The largest of the numerous tubercles which lie on 

 the gastric area is placed on the most prominent central point ; four or five 

 smaller ones are disposed in a somewhat irregular diagonal row on the side 

 of the deep depression which divides the branchial from the cardiac area. 

 The rostrum is directed forward and downward at an obtuse angle with the 

 axis of the body; it is con.stricted in front of the antennular pockets, leav- 

 ing a dentiform tubercle on each side ; there is also, in most examples, a 

 rudimentary tubercle on each side of the rostrum near the tip ; the upper 

 side of the rostrum is excavated between the eyes. The upper border of 

 the orbits exhibits two tubercles. The antero-latcral border of the cara- 

 pace is armed anteriorly with roimded tubercles which pass into prominent 



