MARINE ISOPODS FROM THE PHILIPPINE ISLANDS. 



35 



The male is narrow, elongate. The head has the anterior margin rounded; eyes 

 distinct and situated in the postlateral angles. 



The seven segments of the thorax are distinct, with the lateral margins rounded and 

 not contiguous, but widely separated. 



The six segments of the abdomen are distinct, with lateral margins rounded, sepa- 

 rated at the sides, and gradually becoming narrower to the last, which is produced 

 posteriorly in a small median triangular process. There are five pairs of small, 

 rounded, sac-like pleopoda. 



Only one specimen was collected, by Dr. Paul Bartsch at Tileg Lubang Island. 

 It was taken from the branchial cavity of Phymodius ungulatus (Milne Edwards). 

 Type, catalogue number 40921, United States National Museum. 



Genus CRYPTIONE Hansen. 



Cryptione lee vis, sp. nov. 



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

 yellow. 



Head deeply immersed in the first thoracic segment, bilobed in front and with a 

 wide border on the anterior portion. Eyes absent. The first pair of antennas have 

 the first article large and di- 

 lated; the two following ar- 

 ticles minute. The second 

 antennas are composed of four 

 articles. 



All seven segments of the 

 thorax are distinct. Lateral 

 bosses are present on the 

 first four segments. Lateral 

 to these are the pleural plates, 

 which are present on all 

 seven segments, occupying 

 the entire lateral margin in 

 all but the second and third. 

 On one side of the body 

 the pleural plates of the 

 first four segments are wider 

 than on the other side. 



The six segments of the 

 abdomen are distinct, short 

 pleural lamellae being present 

 on all except the last. There are five pairs of smooth double-branched pleopoda, 

 the inner branch of each pair being leaf -shaped; the outer branch having two lobes, 

 being V-shaped. The uropoda consist of a pair of short leaf-like lamellae attached 

 to the terminal segment of the abdomen. 



The marsupial cavity is not completely inclosed by the five pairs of lamellae. 



The male is narrow, elongate. The head is large, transversely oval, without eyes. 

 All seven segments of the thorax are distinct, with the lateral margins not contigu- 

 ous, but separated. All six segments of the abdomen are distinctly separated, the 

 last one being small and provided with a pair of small, short, rounded appendages, 

 the uropoda. On the ventral side are five pairs of simple sac-like pleopoda, a pair 

 for each of the first five segments of the abdomen. 



Two males and three females of this species were collected, at station 5110, Cor- 

 regidor Light, at a depth of 135 fathoms, and station 5121, Malabrigo Light, N. 14° 

 W., 9 mi. (13° 27' 20" N., 121° 17' 45" E.), at a depth of 108 fathoms, in dark-green 

 mud. Type specimen, catalogue number 40922, United States National Museum. 



d e f 



Fig. 32.— Cryptione Isevis. a, Female, X4}; 6, first lamella of 

 marsupium, X9f; c, seventh leg of female, X27£; d, abdomen 

 of male (under side), X20£; e, posterior half of male, Xll£; 

 /, anterior half of male, Xlli- 



