32 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 89 



appearing on the last few segments. Poriferous segments differing 

 in color from the others. 



Anal valves subrectangular, flattened, with prominent margins. 



Joint 3 of the legs much longer than any of the other joints (fig. 

 16, c) ; sterna near the middle of the body wider than the length of 

 the third leg joint. 



BEATADESMUS UTOWANI, n. sp. 



A number of fragments of dead specimens and a single live but 

 immature female (i8 segments) were found January i8, 1932, under 

 rocks on Beata Island, off the south coast of Haiti. The name given 

 this animal associates the island where it was found with the yacht 

 Utowana, on which the members of the expedition lived during three 

 months of exploration in the West Indies. 



Description. — Length of females probably about 25 mm, width 

 3.5 mm ; males shorter and more slender. Body with the sides parallel 

 from near the head to about segment 16 ; dorsum not strongly arched. 



The immature female was entirely white in life, but the dead speci- 

 mens obviously retained much of the color of the living animals, and 

 although none of these had the head or first three segments, all of 

 the poriferous segments are present and usually have a narrow brown 

 area along the transverse sulcus on each side of the middle, the re- 

 mainder of the surface white ; nonporiferous segments with a median 

 light area which is broader at the posterior margin than in front, the 

 remainder of the segment brown or with a narrow portion of the 

 longitudinal margin of the keels white. 



Anterior half of all segments brown below, the dorsum with a white 

 median area, widest at the anterior margin, extending backward and 

 on some of the last segments joining with the white portion of the 

 posterior subsegment. Last segment, valves, preanal scale, and legs 

 entirely dark colored. 



The sterna have 30 to 40 tiny, short hairs scattered over the sur- 

 face but with slightly greater density in front than on the back half. 



Other characters have been given in the generic description. 



Tt/)^.— U.S.N.M. no. 1098. 



BELONODESMUS THAXTERI Chamberlin 



Plate I, fig. 5 



BelonodcsniHs thaxteri Chamberlin, Bull. Mus. Comp. Zool., vol. 62, pp. 246-247, 

 1918. 



This species is very abundant in the forests near Port-of-Spain, 

 Trinidad, and probably is common throughout the island. Its range 



