624 BULLETIN 54, UNITED STATES NATIONAL MUSEUM. 



mm. beyond the extremity of the abdomen. The inner branch just 

 reaches the tip of the last segment of the body. 



All the legs are ambulatory. 



The whole surface of the body is covered with small tubercles. 



Color, generally a uniform gray black, sometimes lighter, varie- 

 gated with irregular dark spots, occasionally black, with the lateral 

 parts of the segments light yellow, forming a marginal border. 



HO. Genus LEPTOTRICHUS Budde-Lund. 



Body rather convex, scarcely contractile, generally setigerous. 



Second pair of antennae short, the first four articles of the peduncle 

 subequal in length; flagellum composed of two articles, of which the 

 first is much shorter than the second. 



Front of head without a margin, produced in the middle with the 

 epistome bulbous; antero-lateral processes obtuse. Vertical marginal 

 line posteriorly wanting. Eyes small. 



Lateral parts of thoracic segments not expanded. 



Terminal segment of abdomen general!} 7 triangular; epimera of the 

 third, fourth, and fifth segments moderately large. 



First and second pairs of pleopoda furnished with tracheae. 



LEPTOTRICHUS GRANULATUS Richardson. 



Leptotrichus granulatus RICHARDSON, Trans. Conn. Acad. Sciences, XI, 1902, p. 

 303, pi. XL, fig. 58. 



Locality. Found in dead coral at Castle Harbor, Bermudas. 



Body roughly and minutely granulated. Color 

 light reddish or yellowish brown, with markings of 

 dark brown in patches on each segment, forming 

 four longitudinal rows, the two median rows not 

 extending anteriorly beyond the third segment of 

 the thorax in one specimen, and in the other being 

 almost obsolete. 



The head is produced in front in a prominent 

 rounded median lobe, and at the sides in large rounded 

 lateral lobes. The eyes are small, but distinct, and 

 are placed at the base of the lateral lobes. The ex- 

 ternal antennae are very short, not reaching the 

 anterior angle of the first thoracic segment. The 

 FIG. 672.-LEPTOTRJ- fourth joint of the peduncle is not longer than the 

 CHUS GRANULATUS. third ; the flagellum is composed of two joints, the 

 first of which is about half the length of the second. 

 The thoracic segments are subequal in length, the lateral parts 

 broadly expanded. 



See Budde-Lund for characters of genus, Crust. Isop. Terrestria, 1885, pp. 192-193. 



