1922.] 



S. Kemp : Notes on Crustacea Decapoda. 



2ir 



2 to 5 teeth, 1 usually 2 or 3 ; these teeth are large and the foremost 

 is ahvays placed behind the most anterior of those on the upper 

 border. 



Supra-orbital, antennal and hepatic spines are present ; the 

 hepatic is placed rather close behind the antennal, but on a lower 

 level. The lower limit of the orbit is defined by a blunt angulation 

 of the frontal margin. 



The eyes are stout. The cornea is hemispherical and wider 

 than the stalk ; in life it is traversed by two concentric bands of 

 dark pigment and these may frequently be seen in preserved mate- 

 rial. The ocular spot is distinct and confluent with the cornea. 



The lateral process of the antennule is short, not reaching the 

 middle of the basal segment. The spine at the distal end of the 

 outer border of this seg- 

 ment is stout, but does 

 not reach to the middle 

 of the second segment ; 

 the margin between 

 the spine and the arti- 

 culation is strongly 

 sinuous (text-fig. 58a). 

 The two distal segments 

 are slender. The outer 

 antennular flagellum is 

 cleft for only a very 

 short distance, the fus- 

 ed basal portion com- 

 prising 10 to 13 seg- 

 ments. In both sexes 

 the total length of the 

 outer ramus is con- 

 siderably less than that 

 of the peduncle. The 

 antennal scale (text-fig. 

 58ft) is narrow at the 

 apex and is from 3*9 to 



4"3-times as long as broad in adults ; in young specimens it is more 

 slender, sometimes as much as 5 times as long as broad. The cuter 

 margin is concave and ends in a spine which projects far beyond 

 the end of the lamella. 



The third maxilliped bears a small arthrobranch and reaches 

 about to the end of the basal antennular segment. The ante- 

 penultimate segment is somewhat curved and bears from 1 to 3 

 slender spines on the outer margin ; the exopod reaches a little 

 beyond its distal end. The ultimate segment is three-quarters the 

 length of the penultimate. 



The first peraeopods (text-fig. 59a) reach beyond the antennal 



Text-fig. 58. — Peyiclimenes grandis (Stimpson). 



a. Part of antennular peduncle. 



b. Antennal scale. 



1 Of eighty-four specimens thirty-four have 2 ventral teeth, thirty-seven have 3, 

 eleven have 4 and two have 5. 



