PANULIRUS. 107 



ternal margin of the merus at its point of articulation with the carpus. 

 Carpus trianguhir, unarmed. Chela with sharp upper and lower margins; 

 upper margin with five to seven spines, inner and outer faces with a few 

 scattered spinules ; fingers with denticulate prehensile margins and curved 

 crossed tips. Second pair of legs also chelate, but the chela is small. The 

 remaining pairs of legs are not chelate, the dactyli curved, slender, and 

 acute. 



The first abdominal appendages are modified for copulatory purposes ; 

 they are composed of a basal stem which bears an expanded terminal plate 

 concave on its inner face (Plate XXVII., Fig. 1''). The second abdominal 

 limb consists of a basal stem which carries a three-jointed inner and a mul- 

 tiarticulate outer branch ; at the proximal end of the second joint of the 

 inner branch is a minute blunt process (stylamblys of Bate). The three 

 following pairs of abdominal appendages are made up of a stem and two 

 terminal branches, the inner of which bears a rather long and slender styl- 

 amblys. The last pair of abdominal appendages, or swimmerets, are broad ; 

 both branches have a longitudinal median rib, and the outer branch is 

 divided near the tip by a suture that runs diagonally from the external 

 margin to the posterior margin ; along this suture are seen articulated 

 spinules, and there is also an unarticulated spine on the external border of 

 the inner plate near the distal end. 



For the branchial formula, see p. 105, under the generic diagnosis. 



Length of carapace, 22.2 mm. ; rostrum, 5.5 mm. ; abdomen, 30 mm. ; 

 cheliped, 39 mm. ; merus of cheliped, 14 mm. ; chela, 17 mm. 



Station 3418. 660 fathoms. 9 males. 



Family PALINURIDiE. 



PANULIRUS Gray. 



List Crust. Brit. Mus., p. f)9, 1847. 



Panulirus sp. 



A small specimen of Panulirus, 23 mm. long, was taken at Station 3354, 

 322 fathoms. It is too young to show its specific characters. 



The only other representatives of this family found in the collection are 

 seven specimens in the Phyllosoma stage. 



