584 



Parascelus Thyropus 



1 . Peduncle of antennae I in males 1 . Peduncle of antennae I in 

 markedly curved at base and males straight, 1/4 length of 

 more than 1/3 length of 1st 1st segment of flagellum. 

 segment of flagellum. 



2. Pereopods I shorter than pere- 2. Pereopods I equal to or longer 

 opods 11. than pereopods II. 



3. In pereopods I and II, 5th 3. In pereopods I and II, 5th 

 segments slightly broadened and segments narrower, without 

 their posterior distal angles form distal processes. 



small but noticeable rounded 

 processes. 

 471 4. In pereopods VI, 4th segment 4. In pereopods VI, 4th segment 

 with distal process. without distal process. 



5. Telson triangular, with rounded 5. Telson hemispherical, 

 tip. 



Type species: Parascelus edwardsi Claus, 1879. 



KEY TO SPECIES OF GENUS PARASCELUS 



1. Second segment of pereopods I shorter than 3rd-7th segments 

 together. Maximum width in proximal half of 2nd segment 

 of pereopods VI 1.5-1.7 times maximum width in distal half. 



Endopodite of uro-pods II 1.3-1.5 times longer than exopodite 



2. P. edwardsi Claus. 



— Second segment of pereopods I much longer than 3rd-7th segments 

 together. Maximum width in proximal half of 2nd segment of 

 pereopods VI only 1.2-1.3 times maximum width in distal half. 



Endopodite of uropods II 1 .7-1 .9 times longer than exopodite 



I. P. typhoides Claus. 



1. Parascelus typhoides Claus, 1879 (Fig. 254) 



Claus, 1879b: 19; 1887: 46; Spandl, 1924: 43; 1927: 262; 

 Chevreux and Page, 1925: 424; Hurley, 1925: 183. — similis Stephensen, 

 1925a: 211. 



Length of adult individuals up to 7 mm. 



The head is flattened anteriorly, its height four-five times its length 

 and approximately equal to its width, and ventrally terminates in a small 

 process that does not project forward. The pereon is broad, dorsally 

 bulged, its first two somites together equal to somite III in length. The 

 urosome and telson are tucked under the pereon. 



