8 



MARINE ISOPODS FROM THE PHILIPPINE ISLANDS. 



Genus EURYDICE Leach. 

 Eurydice orientalis Hansen. 



Eurydice orientalis Hansen, Vidensk. Selsk. Skr. (6), naturvidenskabelig og mathematisk Afd., v, 

 3, 1890, p. 369-370, pi. VI, fig. 2-2h. 



Locality: A large number of specimens, all females, were collected at Nasugbu, 

 Luzon, and one female was taken at Busin Harbor, Burias Island, by electric light. 

 One specimen, no locality, electric light; one from anchorage, Nato, Luzon; nine from 

 Cabugao Bay; fifty from Mahinog, anchorage, Camiguin Island. Hansen's two speci- 

 mens, both males, were from Java. 



Family BARYBROTID^. 

 Genus BARYBROTES Schicedte and Meinert. 

 Barybrotes agilis Schicedte and Meinert. 



Barybrotes agilis Schicedte and Meinert, Nat. Tidsskr. (3), 1879-1880, p. 283-284, pi. in, fig. 11-13. 

 Barybrotes indus Schicedte and Meinert, Nat. Tidsskr. (3), 1879-1880, p. 281-283, pi. in, fig. 1-10, 

 pi. iv, fig. 1. 



Barybrotes agilis Hansen, Vidensk. Selsk. Skr. (6), v, pt. 3, 1890, p. 403-405, pi. ix, figs. 3-3s. 



Locality: Varadero Bay, Mindoro; one specimen. Schicedte and Meinert had one 

 specimen from the Bay of Bengal, another from the sea of Java, and another from 

 Gaspar Straits. 



Family ALCIROMM.a 



Genus ALCIRONA Hansen. ^ 



Alcirona tuberculata, sp. nov. 



Body oblong-ovate, 7.5 mm. long and 3 mm. wide. Color yellow. 

 Head wider than long, 1 mm. : 1.75 mm., with the anterior margin rounded. Eyes 

 moderately large, composite, and situated at the postlateral angles. First pair of 

 antennae with the peduncle composed of two short articles, the first of which is about 

 twice as long as the second; flagellum, composed of fourteen articles, extends to the 

 middle of the first thoracic segment. Second pair of antennae with a peduncle of five 



articles, the first two of which are short and 

 subequal; the third is about equal to the 

 first two taken together; the last two are 

 also subequal, and each about as long as the 

 first three taken together; flagellum, com- 

 posed of twenty articles, extends to the pos- 

 terior margin of the third thoracic segment. 



The first segment of the thorax is a little 

 longer than any of the following five seg- 

 ments, which are subequal, and the seventh 

 is a little shorter. Epimera are present on 

 all the segments except the first. The first 

 two are narrow, with rounded extremities, and do not extend beyond the posterior 

 margin of the segments. The two following have the posterior extremities acutely 

 produced and extending just a little beyond the postlateral angles. The last two 

 are also acutely produced, and they extend some distance beyond the postlateral 

 angles of the segments. 



The first segment of the abdomen is entirely concealed ; the three following segments 

 are subequal; the fifth is a little longer than any of the preceding; the sixth or terminal 



a b 

 Fig. 7.— Alcirona tuberculata. a, Abdomen 

 X 9f ; b, first leg of male, X 20J-. 



alt does not seem necessary for the reasons given to change the family name to Corallanidse, as Steb- 

 bing has suggested, nor to change Cirolanidse to Eurydicidae nor Arcturidse to Astacillidae. 



