30 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 124 



Mandibular palp and 4 epipods present. 



Last 3 thoracic somites with unarmed submedian and intermediate 

 carinae; lateral process of fifth somite bilobed, anterior lobe a slender, 

 anteriorly curved spine, posterior lobe slender, short, directed later- 

 ally; lateral process of sixth somite bilobed, both portions triangular, 

 acute, anterior much slenderer and shorter than posterior; lateral 

 process of seventh somite bilobed, anterior lobe small, obtuse, posterior 

 lobe much larger, triangular; ventral keel of eighth somite rounded, 

 inclined posteriorly. 



Abdomen with 8 carinae on first 5 somites, 6 on last, submedians 

 slightly divergent on each somite; abdominal carinae spined as 

 follows: submedian, 4-6; intermediate, 2-6; lateral, 1-6; marginal, 

 1-5; sixth somite with spine on each side in front of articulation of 

 uropod. 



Telson longer than broad, with 6 sharp marginal teeth, each with 

 short dorsal carina; prelateral lobe present; denticles rounded, 4-5, 

 7-8, 1 ; ventral surface with postanal keel. 



Proximal segment of uropodal exopod with 9 graded, movable 

 spines, last short, not extending to midlength of distal segment; lobe 

 on outer margin of inner spine of basal prolongation prominent, 

 rounded, margin concave. 



Color. — Largely faded in specimen from Madagascar except for 

 dark pigment on uropods; proximal segment of exopod with distal 

 half dark, distal segment with dark patch on proximal half of inner 

 side; distal half of endopod dark. 



Size. — Only specimen examined, female, TL 102.0; other measure- 

 ments of female: carapace length 23.0; cornea width 5.8; rostral plate 

 length 3.5, width 3.8; telson length 21.4, width 18.9. 



Discussion. — In his account of the variation in Sguilla oratoria, 

 Kemp (1913, p. 68) noted that two specimens from Mauritius differed 

 from typical S. oratoria in having (a) a longer rostral plate, (b) the 

 anterior portion of the lateral process of the sixth thoracic somite 

 shorter than the posterior, and (c) the submedian carinae of the fourth 

 and the lateral carinae of the first and second abdominal somites 

 spined posteriorly. It was in this account that the name, "S. mauriti- 

 ana," a manuscript name of Wood-Mason, was introduced. The speci- 

 mens reported here differs from S. oratoria in these three features. 



In 1942 Ward described Sguilla juxtaoratoria from Mauritius. Al- 

 though he gave some differences between his species and S. oratoria, 

 his account was too brief to permit recognition of the species. Through 

 the kindness of M. Claude Michel of the Mauritius Institute, I was 

 able to examine Ward's type and confirm that it is conspecific with 

 the specimen reported here. A more complete account of the type is 

 in preparation in a review of the species of the u oratoria group." 



