16 PROCEEDINGS OF THE NATIONAL, MUSEUM. vol.61. 



Dorsum of segments convex ; smooth, showing neither tubercles nor 

 polygonal areas, and also with no transverse sulcus. All keels nar- 

 row, even the anterior ones being longer than broad, while in the 

 posterior ones the anterior portion in front of the pore-body is repre- 

 sented only by a simple ridge or swelling on the side of the tergite. 

 Anterior corners of keels rounded, the posterior curve in general only 

 weakly produced even on posterior tergites. 



Sternites without tubercles or processes in male. 



Pleural keels present on first nine segments. 



Gonopods as shown in plate 6, figures 1 and 2. 



Length, to about 25 mm. ; width, to 4 mm. 



Localities. — Porto Rico: El Yunque. (L. Stejneger; C. W. Rich- 

 mond 1900), (Type locality); La Munda (November, 1899, G. P. 

 Goll) ; Lares (A. Busck, 25, January, 1899). 



Type.— Cat. No. 861, U.S.N.M. 



Family CYCLODESMIDAE. 

 Genus CYCLODESMUS Humbert and Saussure. 



CYCLODESMUS HAITIANUS Chambcrlin. 



Plate 6, fig. 3. 



Cyclodesmus haiiianns Chamberiin, Bull. Mus. Comp. Zool., 1918, vol. 62, 

 p. 215. 

 Locality. — Haiti: Diquini and Petionville. 



CYCLODESMUS BRUESI Chamberlin. 



Plate G, fig. 6. 



Cyclodesmus bruesi Chamherlin, P.iill. Mus. Comp. Zool., 1918. vol. 62, p. 

 215. 

 Locality. — Jamaica : Liguanea Plain. 



CYCLODESMUS PINETORUM. new species. 



Plate 6, figs. 4, 5. 



With a broad pale band along middorsal region, the sides below it 

 being dusky but with a vertical light mark inclosed on each keel. 

 Usually the dusky color of the sides extends across dorsum in a nar- 

 row band along the caudal border of each segment. The usual 

 middorsal dark line showing through in posterior region. 



The third keel not expanded below as much as in C. poixellanus, 

 being but little broader below than dorsal region of the tergite, 

 nearly as in O. haitianus. It is most readily distinguished from the 

 latter species by the form of the fourth keel, which at the lower end 

 is more broadly rounded and lacks the notch on caudal side as 

 shown in figure 4, with which compare plate 6, figure 4. In the 



