28 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 125 
known only from St. John, West Indies. The presence of well-developed 
eyes in this specimen distinguishes it from A. crassa, in which eyes are 
absent. The present specimen differs from the descriptions of A. 
crenulata in several details, although many (if not all) of the variances 
may be due to age. The buoy specimen is only 3.5 mm in length, 
whereas Barnard’s (1925a) description of A. crenulata gives a length 
of 18 mm. The buoy specimen also differs from the description of 
this species in lacking crenulations in the telson, in showing only 
slight crenulations on the margin of the uropodal exopod, in having 
a more broadly rounded telson, and in having the posterolateral 
angles of the seventh pereonal segment only slightly produced 
backward. 
Order TANAIDACEA 
As previously indicated, the Tanaidacea (Chelifera) are represented 
poorly in the buoy collection. Only three species in as many genera 
were encountered, two in the family Tanaidae G. O. Sars (as emended 
by Lang, 1949) and one in the family Paratanaidae Lang, 1949. They 
were found on only 14 buoys. Although this is a relatively small order 
(only 250 species; Waterman and Chace, 1960) compared to the 
Isopoda (4000 species), tanaidaceans are taken commonly in benthic 
samples, especially in warm waters. Except for one station in San 
Francisco Bay, Calif., the buoys from which tanaidaceans were 
collected were situated in warm coastal waters of the Bahamas, 
Florida, Texas, and southern California. 
Suborder DIKONOPHORA 
Family PARATANAIDAE 
Leptochelia dubia (Kr¢yer) G. O. Sars 
FicurE 4 
Locauit1ns.—Bahamas: Walker Cay (Stations 59, 60, 62, 63). 
Florida: Key West region (Stations 43, 46-48). Texas: Sabine Pass 
(Station 58). 
Remarks.—Conflicting views regarding the synonymy of Lepto- 
chelia dubia and related species make it difficult to define its geo- 
graphic distribution. 
Richardson (1905b) gives only three localities for L. dubia: Brazil, 
Bermudas, and ‘Porto Rico.” Her earlier list (1901), however, also 
includes several other localities: Noank, Conn.; Woods Hole and 
Provincetown, Mass.; Guernsey, British Channel; Ireland; Atlantic 
coast from Brittany to Senegal and Teneriffe; and the Mediterranean. 
The discrepancy is due to Richardson’s transferring several names 
SS 5§$ 
