no. 1926. NEW ISOPODS FROM GALAPAGOS I SUDS — RICHARDSON. 161 



and size. The propodus of the fossorial legs is furnished with four 

 spines on the inner margin. 



There are five pairs of double-branched pleopods, which are small 

 and slender and rather difficult to see. 



Only one specimen was collected by the U. S. Bureau of Fisheries 

 steamer Albatross April 4, 1888, at station 2807, off Chatham Island, 

 Galapagos Islands, at a depth of 812 fathoms in globigerina ooze, 

 coral, and mud. 



Type-specimen. — Cat. No. 43694, U.S.N.M. 



MUNNOPSIS LONGIREMIS, new species. 



Body oblong-ovate. Anterior division wider than posterior 

 division. 



Head wider than long, 3 J mm. wide, 1J mm. long (including the 

 rostrum). The front is produced between the basal articles of the 

 antennae, the anterior margin of the 

 rostrum being straight. The first pair 

 of antennae have the basal article large 

 and dilated; the second is small and 

 short; the two following are subequal 

 and both together about equal in length 

 to the second; the flagellum is very 

 long, extending to the posterior margin 

 of the fourth thoracic segment. The 

 second antennae are broken at the end 

 of the third article and the terminal 

 parts lost. The eyes are absent. The 

 mandibles have a 3-jointed palp, the 

 middle article being about three times 

 as long as either of the other two. 

 (See fig. 3.) 



The first segment of the thorax is 

 shorter in the middle of the dorsal re- 

 gion than either of the two following, 

 which are subequal. The first segment 

 is 0.3 mm. long, the second and third 

 each 0.5 mm. The fourth segment is 

 short in the middle of the dorsal region 

 (about 0.5 mm.), and is produced back- 

 ward at the sides. The fifth segment is 0.5 mm. long in the middle of 

 the dorsal region. The sixth and seventh segments are longer in the 

 middle of the dorsal region than any of the preceding, the sixth being 

 twice as long as the fifth (1 mm.) and the seventh a little longer than 

 the sixth. The lateral parts of the last three segments are produced 

 backward. All the segments are provided with epimera. 

 48702°— Proc.N.M. vol. 43—12 11 



Fig. 3.— Munnopsis longiremis. 



