ATLANTIC AND CARIBBEAN PYCNOGONIDA—HEDGPETH 247 
2. Clubbed spines present on basal segment of scape and lateral processes. 
rugulosa (p. 247) 
Clubbed spines absent from basal joints of scape and lateral processes. 
appendiculata (Dohrn, 1881) 
AMMOTHELLA RUGULOSA (Verrill) 
FIGURE 39, a 
Ammothea (Ammothella) rugulosa VERRILL, 1900, p. 581, figs. 2, 3, pl. 70, fig. 90. 
Ammothea appendiculata Coun, 1904b, pp. 323-324, pl. 21, figs. 15-18; pl. 22, 
figs. 19, 20. 
Ammothella rugulosa Marcvus, 1940b, pp. 92-93, fig 12, a-g. 
RECORDS OF COLLECTIONS 
Biscayne Bay, Fla., Jan. 27, 1947, from fouling on vessel bottom, F. M. Bayer 
coll., 1 male (ov.), 2 females (Univ. Miami). 
Fort Jefferson, Tortugas, Fla., Aug. 4, 1924, washed from seaweed, moat near 
intake pipe, W. L. Schmitt coll., 1 male, 1 female. 
Kast side of Loggerhead Key, Tortugas, Fla., July 28, 1924, W. L. Schmitt 
coll., 1 specimen. 
Tortugas, Fla., July 24, 1930, from seaweed, W. L. Schmitt coll., 1 male. 
This small pycnogonid is difficult to examine because of the debris 
usually found on the surface of the body and on the legs among the 
numerous spines. The club-shaped spines are about half as long as 
the unspecialized type on the chelifores and about half as long as the 
diameter of the scape. Clubbed spines are present over the insertion 
of the palps in some of the specimens, lacking in others. When there 
is no clubbed spine over the palpi, there may be a small projecting 
tubercle instead. 
Disiribution.—Bermuda, southeastern Florida, Tortugas, Bahia de 
Santos and Itanhaen, Brazil. A littoral species. 
AMMOTHELLA MARCUSI, new species 
Figure 39, b-g 
Holotype (male).—U.S.N.M. No. 81099, northeast end of Logger- 
head Key, Tortugas, Fla., August 6, 1926, about 15 feet, from old 
rocks and algae, C. R. Shoemaker coll. 
Description.—Trunk oval in outline, lateral processes slightly spread 
distally, with prominent lateral spurs on anterior and posterior cor- 
ners. Eye tubercle tall, erect, with a small tubercle on its apex. 
Kyes large, near top of tubercle. 
Proboscis about as long as trunk, pyriform. 
Abdomen slender, arched, as long as last three trunk segments, 
slightly swollen distally, and with three ranks of spines. 
Palpus slender, the terminal joints considerably longer than wide. 
Chelifore slender, basal joint of scape nearly as long as second, 
chelae rudimentary. Armed with long slender hollow spines and 
a few minutely barbed spines (fig. 39, /). 
