IQ22.J 



S. Kemp : Notes on Crustacea Decapoda. 



257 



A. miersi (de Man). 



Rostrum apically pointed in lateral 

 view, with 4 or 5 small teeth on upper 

 border near tip and sometimes with ior 2 

 denticles on lower border. 



Antennnl spine o f carapace present. 



Dactylus of last three peraeopods 

 scoop-shaped ; apex slender and sharply 

 pointed ; accessory spine sharp and 

 conspicuous ; reflected portion of upper 

 margin with fine microscopic spinules 

 (text-fig. 85). 



Distance between the two pairs of 

 florsa! spinules of telson (when present) 

 about equal to distance between poste- 

 rior pair and apex. 



Larger, ovigcrous females 25 mm. or 

 more in length. 



In other respects the species 

 distal end of the basal segment 



A demani, sp. nov. 



Rostrum squarely truncate at apex in 

 lateral view, the upper end of the trun- 

 cate margin armed with 2 or 3 small 

 teeth (text-fig. 86). 



Antennal spine of carapace absent. 



Dactylus of last three peraeopods 

 scoop-shaped ; apex broader and less 

 sharply pointed ; accessory spine very 

 blunt and inconspicuous ; reflected por- 

 tion of upper margin entirely covered 

 with rather coarse spinules (text-fig. 88). 



Distance between the two pairs of 

 dorsal spinules of telson more than 

 twice the distance between posterior 

 pair and apex (text-fig. 87/1). 



Smaller, ovigerous females 10 mm. in 

 length. 



closely resembles A . miersi. The 

 of the antennular peduncle (text- 



Text-KIG. 8f). — Anchistus demnni, sp. nov. 

 Anterior part of carapace, rostrum, etc. 



fig. 87a) is produced externally beyond the articulation of the 

 second segment and the outer margin does not end in a spine. 

 The fused portion of the outer flagellum is short and is composed 

 of only 3 segments, as against 5 or 6 in A . miersi. The antennal 

 scale (text-fig. 876) is strongly narrowed distally and the ante- 

 penultimate segment of the third maxilliped (text-fig. 87c) is little 

 broader than the distal segments. 



In the first peraeopods (text-fig. 87^) the carpus is shorter 

 than the merus and about one-sixth longer than the chela, the 

 fingers are longer than the palm. The second peraeopods are 

 unequal. In the larger of the two (text-fig. 8ye) the merus is 2*5 

 times as long as broad; the carpus is little more than half the 

 length of the merus and is as broad as long. The palm of the 

 larger limb is 2*5 times the length of the merus and is twice or 

 rather more than twice as long as the fingers. The dactylus (text- 

 fig. 87/) bears a large triangular tooth in its proximal third and a 

 knob close to the articulation ; the fixed finger has a series of 4 



