MARINE ISOPODS FROM THE PHILIPPINE ISLANDS. 



9 



segment is triangular, with apex rounded and furnished with six small spines and 

 numerous hairs. Its dorsal surface has two parallel rows of four small tubercles, one 

 row on either side of the median line. The outer branch of the uropoda is produced to 

 an acute extremity and does not reach beyond the extremity of the abdomen; the inner 

 branch is about twice as wide, more rounded at the extremity, and extends just a little 

 beyond the extremity of the abdomen. Both branches are fringed with hairs and 

 furnished with spines. 



The first three pairs of legs are prehensile and have the merus armed with five (in the 

 male, four in the female) stout and blunt spines, close together with lateral edges 

 meeting. The propodus has a process at the inner distal angle and has the inferior 

 margin rather irregular in outline. The last four pairs of legs are ambulatory and are 

 furnished with a few spines. 



Only two specimens, a male and a female, were collected at station 5141, Jolo Light, 

 S. 17° E., 5.50 mi. (6° 09' 00" N., 120° 58' 00" E.). Depth, 29 fathoms, in coral and 

 sand. Type specimens, catalogue number 40910, United States National Museum. 



This species can be distinguished from all the known species of the genus by the 

 parallel rows of tubercles on the abdomen and the difference in the prehensile legs. 



Genus LANOCIRA Hansen. 



Lanocira gardineri Stebbing. 



Lanocira gardineri Stebbing, Fauna and Geography of the Maldive and Laccadive Archipelagoes, n, 

 pt. 3, 1904, p. 706-707, pi. Li a; Ceylon Pearl Oyster Fisheries Report, 1905, pt. iv, p. 19. 



Locality: Station 5108, Corrigidor Strait, N. 39° E., 22.50 mi. (14° 05' 25" N., 120° 19' 

 45"E.). (Two males and five females.) Depth: 13 fathoms. Stebbing's specimens were 

 from Mahlosmadulu atoll and Galle reef; also Cheval Paar and "Gulf of Manaar." 



The specimens collected by the Albatross differ from the type as described by Steb- 

 bing in having the apex of the terminal abdominal segment more rounded and less 

 truncate and in not having the dorsal surface of this segment furnished with setas in 

 the male; the abdomen of the female is furnished with setas. Otherwise they seem 

 to agree perfectly, and have the head of the male with the frontal margin produced 

 and upturned and with the two small tubercles on the posterior portion of the head 

 between the eyes. 



Family ARGATHONID^. 

 Genus ARGATHONA Stebbing. 

 Argathona setosa, sp. nov. 



Body oblong-ovate, 4.5 mm. wide and 20 mm. long. Color yellow, with a few 

 scattered small black dots about the middle of the anterior half and on the entire 

 posterior half of the body. 



Head about twice as wide as long, 1 mm.: 2 mm., with the anterior margin a little 

 produced in the middle and slightly upturned. The eyes are large, composite, oval 

 in shape and situated in the postlateral angles. They are separated by a distance in 

 front equal to the length of one eye. The first pair of antennas have the peduncle 

 composed of two articles, the first of which is about 1.5 times longer than the second; 

 the flagellum, composed of thirteen articles, extends to the end of the fourth peduncu- 

 lar article of the second pair of antennas or to the posterior margin of the head. The 

 second antennas have the first two articles short and subequal; the third is about 1.5 

 times longer than either of the first two; the fourth and fifth are subequal, and each is 

 about three times longer than the third; the flagellum, composed of twenty articles, 

 extends to the posterior margin of the third thoracic segment. 



The segments of the thorax are subequal. Epimera are present on all the segments 

 with the exception of the first. The first two are narrow, with posterior extremities 

 rounded and not extending beyond the posterior margins of the segments. The third 



