TQ22.] 



S. Kemp : Notes on Crustacea Decapoda. 



205 



The rostrum (text-fig. 54) is slender and reaches to or' a little 

 beyond the apex of the antennal scale. It is straight in its proxi- 

 mal half but trends upwards distally. On the slightly concave 

 upper border it bears from 7 to 9 teeth, nearly always 8 or 9; ' 



Text-fig. 54.. — Periclimenes andamanensis, sp. nov. 

 Anterior part of carapace, rostrum, etc. 



the hindmost of these is situated on the carapace and is separated 

 by a rather wide interval from the second, which is placed above 

 the hinder limit of the orbit. The rest of the teeth are more or 

 less evenly spaced, extend- 

 ing to the tip. On the 

 lower border there are 2 or 

 3 teeth, most commonly 2, 2 

 placed a little in advance 

 of the middle of the rost- 

 rum. 



The supra-orbital, anten- 

 nal and hepatic spines re- 

 semble those of the prece- 

 ding species. The eyes also 

 are similar but usually 

 «how only one faint band of 

 dark pigment on the cornea. 



The basal segment of the 

 antennular peduncle has a 

 short lateral process; the 

 distal spine of the outer 

 margin is very short (text- 

 fig- 55 a ), it extends little 

 beyond the articulation bet- 

 ween the first and second segments and the margin between the 

 spine and the articulation is almost straight. The two distal seg- 



Text-FIG. 55- — Periclimenes andamnnensis, 

 sp. nov. 



a. Part of antennular peduncle. 



b. Antennal scale. 



1 Of fifty specimens four have 7 dorsal teeth, twenty-nine have 8 and seven- 

 teen have 9. 



- Of fifty specimens thirty-seven have 2 ventral teeth and thirteen have 3. 



