516 



has a small pointed projection in the distal part of the posterior mar- 

 gin; the distal part of the legs is equal in length to the basal segment; 

 the 4th-6th segments are armed along the anterior margin with spines; 

 the claw is short. Pereopods VII have an elongated 2nd segment which 

 417 is broadest in the proximal part and smoothly tapers distally, its length 

 1 .5-2 times its maximum width and somewhat more than the total length 

 of the remaining segments. The epimeral plates are produced and pointed 

 posteriorly (especially in epimeron III). 



Urosomite I is approximately equal in length and width, and has 

 bulged sides; the second (geminate) urosomite is at least twice longer 

 than wide. The basipodite of uropods I is narrow, reaching the base of the 

 telson. The basipodite of uropods II is half the length of the basipodite 

 of pair I and distally broadened; the tip of the endopodite reaches the 

 base of the rami of uropods III. The basipodite of uropods III is slightly 

 broadened distally and slightly longer than wide; the rami do not reach 

 the tip of the telson. In all uropods endopodites are slightly broader and 

 larger than the exopodites; the margins of the rami and distal parts of 

 the inner margins of the basipodites are denticulate. The telson has an 

 elongated pointed tip. 



The gills are well developed, in males with numerous folds on the 

 surface, in females smooth except for the last pair, which are structured 

 as in males. The oostegites are narrow, not touching, and not offering 

 reliable protection to the developing brood. Undoubtedly they are assisted 

 in this role by the first four pairs of gills. 



Distribution: Tropics and subtropics; usually does not cross the limits 

 of the Subtropical Convergences. It is a relatively eurythermic species, 

 found at 10.7° C along the southern coast of Africa. Reproduction is not 

 confined to a specific season and females with eggs are found throughout 

 the year (Fage, 1960). 



3. Streetsia porcella (Claus, 1879) (Fig. 224) 



Claus, 1879b: 48 (Oxycephalus); 1877: 71 (Oxycephalus); Boval- 

 lius, 1887a: 36 (Oxycephalus); Stebbing, 1888: 1587 (Oxycephalus); 

 Bovallius, 1890: 81; Stephensen, 1925a: 192; Barnard, 1930: 435; Pir- 

 lot, 1938: 370; Shoemaker, 1945: 255; Fage, 1960: 63; Pillai, 1966: 

 188. — intermedia Spandl, 1927: ISS.—nyctiphanes Fage, 1934: 1631. 



Length of sexually mature females 8.5-18 mm, of males 8-17 mm. 



The body is compact, with a thick integument. The head is less than 

 1/3, in larger females less than 1/4 the total body length, and sometimes 

 with a dorsal depression. The maximum height of the head lies in the 

 proximal part, which is occupied by the eyes. Antennae II of males have 

 a distally thickened 1st segment. 



The height of the pereon is less than that of the head, its length equal 

 to or slightly exceeding the length of the head; the last pereon somites 



