514 



segment, while the anterior margin is straight or concave and distally 

 denticulate; the 4th segment is longer than the 5th and 6th and the ante- 

 rior margin of all three segments is finely denticulate. The 2nd segment of 

 pereopods VII has a roundish lobe on the posterior margin that projects 

 proximally above the place of articulation; the segment per se is longer 

 than the rest of the leg, ovate or oval, and slightly longer than wide. 



Epimeral plates I and II are posteriorly pointed, especially in large 

 specimens, but roundish in young specimens. Epimeral plates III have 

 a pointed and often extended posterior angle. The second (geminate) 

 urosomite is approximately twice longer than wide. The telson is the 

 same length or longer and has a strongly extended pointed tip. The 

 basipodite of uropods I has parallel sides and reaches the base of the tel- 

 son. The basipodite of uropods II is half as long and distally broadened. 

 The basipodite of uropods III is distally broadened, relatively short, its 

 length not more than twice its width. The endopodites of all uropods are 

 broader and longer than the exopodites; in the last two pairs they are the 

 same length as the basipodite; the tips of the rami do not reach the tip 

 of the telson. 



Notes: The long head, distal projection of the posterior margin of the 

 2nd segment of pereopods II, and the pointed distal lobe of the poste- 

 rior margin of the 2nd segment of pereopods VI readily distinguish this 

 species from other species of the genus. 



Distribution: The species is more widely distributed in the warm 

 waters of all oceans than S. steenstrupi and S. mindanaonis, penetrat- 

 ing up to 45° N and S; it is common in the Mediterranean Sea. It is 

 encountered down to a depth of 1,000 m but more often in the 0-300 m 

 layer. Females with eggs or embryos have been reported in all seasons; 

 apparently the species does not have a definite season for reproduction. 



2. Streetsia steenstrupi (Bovallius, 1887) (Fig. 223) 



Bovallius, 1887a: 37 (Oxycephalus); 1890: 89; Fage, 1960: 42; Pillai, 

 1966: 19\. —longiceps Stebbing, 1888: 1591 (Oxycephalus). 



Length of sexually mature crustaceans 9-12.5 mm. 



The body has a thin integument and weak, relatively short limbs. 

 The head is longer than the pereon and 1/3 or more the total body length; 

 416 the height of the head is barely more than that of the pereon somites; 

 the rostrum is relatively short, about 1/4-1/3 the total length of the head, 

 anteriorly pointed, sometimes slightly bent downward; rarely light lateral 

 keels are noticeable. Antennae II of males have a distally thickened 1st 

 segment. 



The pereon in females is always longer than the pleon, in males 

 shorter. The 2nd segment of pereopods I is the same length as the dis- 

 tal part of the limb; the 5th segment is much longer than its width and 

 the posterior distal angle stretched and pointed; when the subchela is 



