MARINE ISOPODS FEOM THE PHILIPPINE ISLANDS. 



33 



ASELLOIDEA or ASELLOTA. 

 Family JANIRID^. 

 Genus JANIRA Leach. 



Janira caudata, sp. nov. 



Body oblong-ovate, about 2.5 times longer than wide. Color dark yellow. Surface 

 of body smooth. 



Head wider than long, with the anterolateral angles produced ; the anterior margin 

 between the lateral angles also triangularly produced, in a 

 wide process, not reaching beyond the lateral angles. Eyes 

 large, composite, round, and situated close to the lateral and 

 posterior margins, a small space intervening. The first pair 

 of antennae have the basal article large, dilated, and produced 

 at the inner distal extremity in a small, rounded process. 

 The second article is about half as wide and half as long as 

 the first; the third and fourth are subequal and both together 

 about as long as the second; the fifth is a little longer than 

 either of the two preceding; the sixth or terminal article is 

 minute. The first four articles of the second antennae are 

 short, the third being provided with a scale. The second 

 antennae are broken at the end of the fourth article. 



The seven segments of the thorax have the lateral margins 

 straight, with no indication of epimera. 



The terminal segment of the body, the abdomen, has the 

 postlateral angle acute on either side and the posterior margin 

 produced in a long median process rounded at the extremity. 

 The uropoda are lost in the only specimen. 



Legs all alike in structure, simple, ambulatory. 



One specimen, a male, was collected at station 5218, Anima fig. so.— Janira caudata. 

 Sola Island (E.) N. 10° W., 2 mi. (13° 11' 15" N., 123° 02' X41. 

 45" E.), at a depth of 20 fathoms, in coarse sand. Type, catalogue number 40920, 

 United States National Museum. 



BOPYROIDEA or EPICARIDEA. 

 Family BOPYRIDiE. 

 Genus PROBOPYRUS Giard and Bonnier. 



Probopyrus ascendens (Semper). 



Bopyrus ascendens Semper, Die Naturl. Existenzbedingungen der Thiere, i, 1880, p. 181, rig. 38. 



Probopyrus ascendens Giard and Bonnier, Bull. Scient., xix, 1888, p. 3, pi. n-ni. Max Weber, 

 Zool. Ergebnisse einer Reisein Niederlandisch Ost Indien, n, 1892, p. 555. Bonnier, Trav. Sta- 

 tion Zool. Wimereux, 1900, p. 345-346. 



Locality: Amboina market; Amboina stream; two specimens. Giard and Bonnier's 

 specimens were from the island of Amboina. Semper's specimens were found in the 

 Philippines. 



MEROCEPON, gen. nov. 



This genus is very close to Cancricepon Giard and Bonnier, but differs in having 

 three median dorsal bosses, one on the fifth, one on the sixth, and one on the seventh 

 thoracic segment. In Cancricepon there are four dorsal bosses. In Grapsicepon Giard 

 and Bonnier and in Portunicepon Giard and Bonnier there are two. In Trapezecepon 



