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ANAMATHIA OCCJDENTALIS. 



9 



one in the middle of the cardiac region; one (tubercle) on the intestinal 

 region ; one on each hepatic region ; five on each branchial region. Of the 

 branchial spines the one near the middle projects upward and for\Yard, and 

 is the longest spine on the carapace, being one hall as long as the rostral 

 horns; behind and inside of this there is a short, rather blunt spine in a 

 transverse line with its fellow and the cardiac spine ; the three remainin 



L 



branchial spines are arranged in a triangle on the anterior part of the 

 branchial area; those nearest the median line on the branchial areas are 

 short and blunt — tubercles rather than spines. In addition to these promi- 

 nent spines and tubercles of the carapace, there are four or five small 

 tubercles on the outer border of the pterygostomian region. The rostrum is 



■ 



. 





produced into two divergent awl-shaped horns, which are more than one 



I 



fourth the length of the remaining portion of the carapace. The pra;- 

 ocular sphics are well developed and acute, the postocular pi^ocesses obtuse. 

 The basal segment of the antenna projects at the antero-external angle in 

 the form of a short, blunt spine or tubercle. The antero-external angle of 

 the buccal area projects, but does not form a dentiform process. The chcli- 

 peds are twice as long as the carapace, minus the rostral horns, and are but 

 little more robust than the ambulatory limbs; the chela is a little longer 

 than the merus, the basal part cylindrical, the distal part gradually widening 

 a little to the base of the fingers; the fingers are slightly curved, less than 

 one half as long as the basal portion, smooth, prehensile edges regularly 

 dentate, closing throughout their length. The first ambulatory appendages 

 exceed the chelipeds by the length of the terminal joint; the other pairs 

 are successively shorter, the last pair being shorter than the chelipeds. 

 The merus of all the legs has a small tubercular projection, at the distal end 

 above, most prominent on the anterior pair. The carpus of the chelipeds 

 has two low ridges on the outer face ; otherwise the legs are unarmed, but 

 they are closely invested with minute papilhx), Hke the carapace. The 

 abdomen is seven-jointed. 



Length of carapace, without the rostral horns, 45 mm. ; breadth of cara- 

 pace, 38 mm.; length of rostral horns, 12 mm. ; length of longest branchial 



spine, 7 mm. . 



Station 3404. 385 fathoms. 1 male. 



In the unique type specimen, the left hind leg has been broken off and 

 restored. The chelipeds and the first pair of ambulatory appendages are 

 unsymmetrical, the left being longer than the right. 



2 



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