MARINE TSOPODS FROM THE PHILIPPINE ISLANDS. 



15 



The first three pairs of legs are prehensile, and have the propodus unarmed, the 

 merus armed with one spine, the carpus with seven. The last four pairs are ambu- 

 latory and furnished with a few spines. 



Five specimens were collected, at station 5501-3, North Mindanao and vicinity, 

 Opol (Mindanao) at a depth of 214-226 fathoms, and station 5517, North Mindanao 

 and vicinity, Point Tagolo Light (Mindanao) at a depth of 169 fathoms. They were 

 found in siliceous sponges. Type specimen, catalogue number 40934, United States 

 National Museum. 



2Ega approximata, sp. nov. 



Very close to Mga synophthalma Richardson, a but differs in having the first antennae 

 with a flagellum composed of fifteen articles, extending to the posterior margin of the 

 first thoracic segment; in having the second antennae with a flagellum composed of 

 nineteen articles extending to the posterior margin of the third thoracic segment; in 

 having the outer postlateral angles of all the epimera acute; in having the terminal 

 abdominal segment more rounded and less triangular, with the margins crenulate and a 

 very small V-shaped excavation in the center, which in A. synophthalma is produced in 

 a small point; and in having a longer line of contact of the eyes, making the space in 

 front of the eyes and behind the eyes more shallow. 



Only one specimen was found, at station 5348, Palawan Passage, Point Tabonan, 

 at a depth of 375 fathoms. Type, catalogue number 40940, United States National 

 Museum. 



2Ega spongiophila Semper. 



Mga spongiophila Semper, Arch. Naturg., xxxm, 1867, p. 84; Ann. Mag. Nat. Hist. (4), n, 1868. 

 p. 29. Miers, Journ. Linn. Soc, xm, 1880, p. 509, pi. xxiv, fig. 3-5. Schioedte and Meinert, Nat, 

 Tidsskr. (3), xn, 1879-80, p. 378-380, pi. IX, fig. 11-16. 



Locality: Station 5371, near Marinduque, Tayabas Light, at a depth of 83 fathoms; 

 one specimen. 



This species has been previously recorded from the Philippines by the authors men- 

 tioned above. It lives in the sponge, Euplectella aspergillum . 



2Ega antennata, sp. nov. 



Body oblong-ovate, 43 mm. long and 16 mm. wide. Surface punctate. Color light- 

 brown. 



Head more than twice as wide as long, 3 mm.: 8 mm., with the front produced in a 

 long acute median point extending 1.5 mm. beyond the anterior margin. Eyes large, 

 oval, composite, twice as long as wide, 2 mm.: 4 mm., and separated by a distance 

 of 2 mm. at their anterior extremities. The first pair of antennae have the basal 

 article of the peduncle twice as wide as long, 1 mm.: 2 mm., extending 0.5 mm. beyond 

 the median point and having the inner anterior angle produced in an acute process 

 directed inward; the second article is also short, but narrower than the first, and has 

 the outer anterior part produced in a rounded process; the third article is slender and 

 elongate; the flagellum, composed of fourteen articles, extends to the posterior margin of 

 the head or to the end of the peduncle of the second antennae. The second antenna? 

 have the first three articles of the peduncle short, the first and third subequal, the 

 second about half as long as either of the other two; the fourth is twice as long as the 

 third; the fifth is 1.5 times the length of the fourth; the flagellum, composed of four- 

 teen articles, extends two-thirds the length of the first thoracic segment. 



The first four segments of the thorax are long and nearly subequal, the first being 

 4.5 mm., the second and fourth 4 mm. , and the third 3.5 mm. The last three segments 

 gradually decrease in length, the fifth being 3 mm., the sixth 2.5 mm., and the seventh 

 2 mm. Epimera are present on all the segments except the first, those of the second 

 and third segments not reaching beyond the postlateral angles of the segments and 



a Proc. U. S. Nat. Mus., vol. 37, 1909, p. 81. 



55841°— 10 3 



