MARINE ISOPODS FROM THE PHILIPPINE ISLANDS. 39 



There are five pairs of incubatory plates, which do not entirely enclose the marsupial 

 pouch. The first pair have the distal half produced in a rounded process, but the lobe 

 is not defined. 



All the legs are prehensile. The male is unknown. 



Only two specimens, an adult female and an immature female, were collected 

 at station 5543, north Mindanao and vicinity, Tagolo Light, at a depth of 162 

 fathoms. Type specimen, catalogue number 41007, United States National Museum. 



PARIONE, gen. nov. 



Body of adult female ovate, rather asymmetrical. Head large, deeply immersed in 

 the first segment of the thorax. 



All seven segments of the thorax distinct. Lateral bosses present on the first four. 

 Pleural plates present on all seven segments; on the first four segments thejf extend 

 only half the length of the lateral margin and are lateral to the lateral bosses; on the 

 last three segments they occupy almost all of the lateral margin. 



The six segments of the abdomen are distinct, the last being very small. Pleural 

 lamellae are present on all but the last segment and are not large. There are five 

 pairs of double-branched pleopoda and a pair of simple single-branched uropoda. 

 The pleopoda and uropoda extend a considerable distance beyond the abdomen. 



The male has all seven segments of the thorax distinct. There are but five abdom- 

 inal segments, the last of which is very small. No pleopoda are present, but on the 

 ventral side of the first four abdominal segments the surface is thickened and elevated 

 on either side of the median line. There are no uropoda. 



The type of the genus is Pseudione paucisecta Richardson, a The second species of 

 the genus is the next described in this paper. 



This genus is very close to Pseudione Kossmann, but differs principally from that 

 genus in that the male has but five distinct segments to the abdomen instead of six. 



Parione lamellata, sp. nov. 



Body of adult female ovate, more or less asymmetrical. Color, in alcohol, pale yellow. 



Head large, deeply immersed in the first thoracic segment, and with a narrow 

 frontal border, which becomes wider at the sides. Eyes absent. The first pair of 

 antennae are composed of three articles; the second antennae of five. 



a bed 



Fig. 37. — Parione lamellata a, Female, X 3£; 6, first lamella of marsupium, X 9f; c, male, X 9|; 

 d, seventh leg of female, X 20|. 



All seven segments of the abdomen are distinct. There are lateral bosses on the 

 first four segments. Lateral to these are the pleural plates, which extend only half 

 the length of the lateral margin. The pleural plates of the last three segments are 

 large and occupy almost the entire lateral margin. 



a Proc. U. S. Nat. Mus., vol. xxvn, 1904, p. 85-86. 



