ISOPODS OF NORTH AMERICA. 



227 



ANILOCRA LATICAUDA Milne Edwards. 



Anilocra latira ut In MII.XK EDWARDS, Hist. Nat. Crust., Ill, 1840, p. 259. 



Anilocra mexieana SArssrRE, Rev. Mag. Zool., 1857, p. 505. 



Anilocra leachii (KR0YER) SCHICEDTE, Natur. Tidsskrift (3), IV, 1866, p. 205, pi. 

 xi, figs. 2a-2g. 



Anilocra laticauda SCHICEDTE and MEINERT, Naturhistorisk Tidsskrift (3), XIII, 

 1881-83, pp. 126-131, pi. ix, figs. 1-3. RICHARDSON, American Naturalist, 

 XXXIV, 1900, p. 221; Proc. U. S. Nat. Mus., XXIII, 1901, p. 528. 

 MOORE, Report U. S. Commissioner of Fish and Fisheries, XX, Pt. 2, 1902, 

 p. 172, pi. x, figs. 3-4. 



Localities. From Maryland to the Straits of Magellan; Maryland; 

 Key West; St. Anna, Mexico; Cozumel, Yucatan; Habana, Cuba; St. 

 Thomas; St. Croix; St. Bartolomew; Rio de Janeiro, Brazil; Sandy 

 Point, in Straits of Magellan; Porlamar, Margarita Island, Venezuela; 

 Arroyo and Vieques, Porto Rico. 



Parasite of JIsBm/ul&n plumieri; also of Upeneus martinicus. 



FIG. 230. ANILOCRA LATICAUDA (AFTER SCHICEDTE AND MEINERT). a, YOUNG OF THE SECOND STAGE. 

 6, ADULT FEMALE, c, YOUNG OF THE FIRST STAGE. (ALL ENLARGED.) 



Body oblong-ovate, nearly two and 'a half times longer than wide, 

 14 rnm. : 34 mm. Bod}^ widest at the fifth thoracic segment. 



Head wider at the base than long, 3 mm. : 5 mm. , somewhat triangular 

 in shape, becoming gradually narrower toward the anterior extrem- 

 ity, which is produced to a narrow, pointed apex, bending downward 

 over the antennas, separating the basal articles, and extending on the 

 ventral side to the mouth parts. From a dorsal view the anterior 

 margin is 2 mm. wide and is truncate. The eyes are large, oval, twice 

 as long as wide, composite, and situated in the post-lateral angles of 

 the head. The head is not at all set in the first thoracic segment. 

 The first pair of antennae are composed of eight articles, and extend 

 to the end of the fifth article of the second pair of antennas. The 

 basal articles are not contiguous, but are separated by a distance of 

 i mm., the width of the frontal process at this point. The second 



