18 



MARINE ISOPODS FROM THE PHILIPPINE ISLANDS. 



Family CYMOTHOID^. 

 Genus ANIL OCR, A Leach. 



Anilocra dimidiata Bleeker. 



Anilocra dimidiata Bleeker, Crust. Ind. Archip., n, 1857, p. 31, fig. 10-10a. Schioedte and Meinert, 

 Nat. Tidsskr. (3), xm, 1881-1883, p. 111-113, pi. vm, fig. 5-6. Stebbing, Willey's Zool. Results, 

 1902, pt. v, p. 639-640; Ceylon Pearl Oyster Fisheries Report, 1905, pt. iv, p. 26. 



Locality: Busin Harbor, Burias Island; Maribojoc Bay, Bohol Island; Pasacao, 

 Ragay Gulf. Schioedte and Meinert's specimens were from the Indian Sea, near 

 Batavia; Stebbing's were from Karuana, British New Guinea, and Palk Bay. 



A label accompanying the specimens reads: "Color, dull slaty blue. Attached to 

 nuchal region of Scolopsis. H. M. S." 



The specimens, three females and three males, have ten articles to the second 

 antennae, as described by Doctor Stebbing. The first antennae are geniculate and 

 the dactyli of the first four pairs of legs are swollen in the middle in a nodule. In 

 the males the uropoda extend a little beyond the abdomen, the outer branch being 

 a little longer than the inner branch. The terminal segment of the abdomen also 

 appears a little wider than figured by Schioedte and Meinert. 



A number of young specimens were collected at the same locality as that of the 

 adults, and also at San Miguel Harbor, Ticao Island, by electric light, and Tomindao 

 Island anchorage. 



Anilocra cavicauda, sp. nov. 



Body ovate-elongate, about three and a half times longer than wide, 10 mm. : 36 mm. 

 Color, uniformly dark yellow. Surface smooth. 



Head wider than long, 3 mm.: 5 mm., sub triangular, with the front produced in a 

 rounded truncate process. Eyes large, oval, composite, and placed in the postlateral 

 angles of the head. First pair of antennae composed of eight articles, 

 the first three of which form the peduncle. The first antennae are 

 geniculate at the articulation of the third and fourth articles, and 

 the third article is dilated with the distal angles projecting beyond 

 the insertion of the fourth article. The first antennae extend to 

 the posterior margin of the head. The second antennae are com- 

 posed of ten articles and extend to the posterior margin of the first 

 thoracic segment. 



The first thoracic segment is 2.5 mm. long; the second is 1.5 mm. 

 long; the third is 2 mm. in length; the fourth is 3 mm. long; the 

 fifth 4 mm.; the sixth 5.5 mm.; and the seventh 3.5 mm. Epimera 

 are present on all the segments with the exception of the first; they 

 extend to the posterior margin in the second and third segments; in 

 the fourth and fifth segments they extend almost to the middle of 

 the lateral margin; in the sixth segment they extend just to the 

 middle of the lateral margin; in the seventh segment they extend 

 a little beyond the middle of the lateral margin. 



The first five segments of the abdomen are subequal, each being 

 1 mm. long. They converge slightly from the first to the fifth and 

 have the lateral margins upcurved. The fifth segment has the pos- 

 terior margin produced on either side near the lateral margin in 

 a long acute process about 1 mm. in length. The sixth or terminal segment is 

 almost twice as long as wide, 5 mm. : 9 mm. The sides converge slightly to within 

 3 mm. of the extremity, where the width is 4 mm.; from that point they converge 

 rapidly to a pointed extremity. The sides, to within 3 mm. of the extremity, curve 



Fig. 17.— Anilo- 

 cra cavicauda. 

 X U. 



