266 PROCEEDINGS OF THE NATIONAL MUSEUM VOL, 97 
Family TANYSTYLIDAE Schimkewitsch, 1913 
Chelifores 1- or 2-jointed, achelate, very small. Palpi 4- to 6- 
jointed. Ovigers 10-jointed, in both sexes. Legs short, with well- 
developed propodus. A group of small compact forms, represented 
by the genus Tanystylum in the western Atlantic. In Clotenia, a genus 
represented on the African coast, the palpi are 4-jointed. This 
genus may be a taxonomic fiction. 
Genus TANYSTYLUM Miers, 1879 
Chelifores 1- or 2-jointed. Palpi 5- or 6-jointed. Ovigers 10- 
jointed. Trunk compact, circular. 
It is probably an accident of collecting that no species of Tanystylum 
are represented in the collections from the Caribbean proper. Tany- 
stylum orbiculare is a common littoral species from Woods Hole to 
Virginia, South Carolina, and Florida and has been collected by 
Marcus in the vicinity of Rio de Janeiro, Brazil. Another curious 
anomaly is the collection of Tanystylum calicirostre at Bermuda. The 
species was previously known from the Gulf of Panama, on the Pacific 
side of the isthmus. 
1. Proboscis rounded or slightly tapered at tip___--------- orbiculare (p. 266) 
Proboscis conspicuously tapered or styliform---------- calicirostre (p. 268) 
TANYSTYLUM ORBICULARE Wilson 
Ficures 8; 49, a 
?Pasithoe umbonata GouLD, 1844, pp. 92-93. 
Tanystylum orbiculare WiLson, 1878b, pp. 5-7, pl. 2, fig. 2, a-f; 1880, pp. 471-473, 
pl. 3, fig. 11—Morean, 1891, pp. 37-49 (embryology).—Sumngr, OsBurn, 
and Co xg, 1913, pp. 141-142, 677, chart 120.—F isu, 1925, p. 161.— Marcus, 
1940b, pp. 105-108, fig. 15, a~h—Hepepern, 1943b, pp. 54-55. _ 
RECORDS OF COLLECTIONS 
Fish Hawk station 8341, Oct. 22, 1915, Chesapeake Bay, lat. 37°22’12’’ N., 
long. 76°10’25’’ W., 9.5 fathoms, 1 female. 
Fish Hawk station 8506, Apr. 22, 1916, Chesapeake Bay, lat. 37°16’50’’ N.., 
long. 76°14’27’’ W., 5.5 fathoms, 1 male. 
Fish Hawk, July 15, 1916, on Lynnhaven Trolley bridge, Va., 2 males, 2 females. 
Virginia Beach, Va., from mast washed ashore, Oct. 5, 1943, W. H. Ball, coll. 
1 male, 2 females, 3 juv. 
One mile inside May River, 8S. C., Jan. 17, 1891, 1 specimen. 
Charleston Harbor, 8. C., Apr. 11, 1935, 4 specimens. 
Port Aransas, Tex., Mar. 25, 1945, from sargassum cast ashore, J. W. Hedg- 
peth coll., numerous specimens, but no ovigerous males. 
(Also numerous specimens from Marthas Vineyard, Newport, R. I., and 
Woods Hole). 
A common but easily overlooked littoral species, not found north 
of Cape Cod. Specimens from Rio de Janeiro are heavier than typical 
material from southern New England, and the segmentation of the 
