MARINE ISOPODS FROM THE PHILIPPINE ISLANDS. 



17 



produced in an acute process, the inner postlateral angle widely rounded. The 

 outer branch is narrow, and rather acutely produced posteriorly. The branches of 

 the uropoda and the margins of the terminal segment of the abdomen are fringed 

 with hairs. 



The first three pairs of legs are prehensile, the last four pairs ambulatory. 



Only one specimen was obtained, at station 5397, between Samar and Masbate, 

 Bugtun Island, at a depth of 134 fathoms. Type, catalogue number 41011, United 

 States National Museum 



This species is similar to Mga ecarinata Richardson, « from the Atlantic coast of 

 North America. 



Mga, magnoculis Richardson. 



JEga magnoculis Richardson, Proc. U. S. Nat. Mus., vol. 37, 1909, p. 80-81. 



Locality: Stations 5536, Pitt Passage, Gomomo Island, at a depth of 1,262 fathoms, 

 and 5671, Macassar Strait, Chenoki Point, at a depth of 960 fathoms; two specimens. 



The specimen from station 5671 has the first two epimera more acutely produced 

 at the outer postlateral angles than any of the specimens heretofore obtained. 



Genus ROCINELA Leach. 

 Rocinela orientalis Schicedte and Meinert. 



Rocinela orientalis Schicedte and Meinert, Nat. Tidsskrift (3), xn, 1879-80, p. 395-396, pi. xni, fig. 

 1-2. Stebbing, Ceylon Pearl Oyster Fisheries Report, 1905, pt. iv, art. xxm, p. 24-25. 



Locality: One specimen from station 5158, Tinakta Island (N.), N. 89° W., 1.90 

 mi. (5° 12' 00" N., 119° 54' 30" E.), at a depth of 12 fathoms, in coarse sand and 

 shells, and another from station 5596. 



Semper's specimens were from the Philippine Islands. Schioedte and Meinert's 

 were from Lapenig (1 specimen) Pandanin (1 specimen), and 

 Calcutta (1 specimen). Stebbing's were from off Negombo, off 

 Uluwitti, off Chilaw Paar, and southeast of Modragan Paar. 



Genus SYSCENUS Harger. 



Syscenus infelix Harger. 



Syscenus infelix Harger, Report U. S. Comm. of Fish and Fisheries for 

 1878, pt. 6, 1880, p. 387-390; Bull. Mus. Comp. Zool., Harvard College, 

 vol. xi, 1883, no. 4, p. 100-102, pi. 3, fig. 5-5a; pi. 4, fig. 3-3h. Richard- 

 son, Proc. U. S. Nat. Mus., vol. 37, 1909, p. 85. - 



Locality: Stations 5621 and 5623, between Gillolo and Makyan 

 Island, at a depth of 272-298 fathoms; two specimens. 



This species has been previously recorded from Japan. The 

 terminal abdominal segment is not quite as acute as in the 

 specimens from the Atlantic coast of North America. 



Syscenus intermedins, sp. no v. 



This species in some respects is similar to Syscenus infelix 

 Harger, and in other respects is similar to Sijscenus latus Rich- 

 ardson. It is similar to S. infelix in the shape of the head, the 

 general shape of the body, and the segments of the abdomen, 

 but differs in having longer first and second antennae and in 

 having the terminal segment of the body rounded at the apex, 

 approaching 8. latus in these characters. The first antennae, 

 with a flagellum of ten articles, extend to the extremity of the peduncle of 

 the second antennae. The second antennae, with a flagellum of twenty-five articles, 

 extend to the posterior margin of the fourth thoracic segment. 



Only one specimen was collected, at station 5301. Type, catalogue number 41009, 

 United States National Museum. 



Fig. 16.— Syscenus 

 inter •medius. X 2-g 



a Proc. Biol. Soc. Washington, vol. xn, 1898, p. 39-40. 



