14 U.S. NATIONAL MUSEUM BULLETIN 29 5 



Miscellaneous collections now in the Smithsonian Institution (see 

 Figure 2) : 



GIL 615 34°17'S 18°27'E 6 m False Bay, South Africa (from J. H. 



Day) 

 RM1004 George Sound, New Zealand 



Ifalik Atoll: USNM 98545-98554, Ace. No. 200652. Washings of algae, alga- 

 encrusted rocks, and dead coral fragments from various littoral, reef, and 



lagoon collecting localities at Ifalik Atoll, West Caroline Islands (by D. P. 



Abbott) . 

 Tortugas: USNM 88843, 88863-88866, Ace. No. 111167. Debris of broken-up 



Pontes clumps, west side of Loggerhead Key, depth 12-15 feet, Tortugas 



Florida (by W. L. Schmitt; see Tressler, 1949) 

 Bimini: Collections in the vicinity of the Bimini Islands, Great Bahama Bank 



(by L. S. Kornicker; see Kornicker, 1961) 

 Andros: USNM Ace. No. 265635; collections in the vicinity of Andros Island, 



Great Bahama Bank (by M. L. Jones) 

 USNM Ace. No. 271766, 66-A-9-XV, 28°15'N, 87°02'W, 1000 m depth (by 



Willis Pequegnat) 

 West Coast of Florida and Florida Bay: Shelf collections (see Benson and Coleman, 



1964) 

 1003: Intertidal collection at Prince Edward Island (South Indian Ocean) (by 



N. R. Fuller) 



Systematic Descriptions 



Family BAIRDIIDAE Sars, 1888 



Subfamily BAIRDIINAE Sars, 1888 



Family Bairdiidae Sars, 1888, p. 288.— Miiller, 1894, p. 265.— Morkhoven, 



1962, p. 113.— Hartmann, 1963, p. 123.— Kollmann, 1960, p. 160 (part). 

 Subfamily Bairdiinae (within family Cyprididae), Sars, 1923, p. 62. 

 Family Nesideidae Miiller, 1912, p. 240. 



Type-genus. — Bairdia McCoy, 1844, p. 164. 



Diagnosis. — Carapace ovate to subhexagonal in lateral view, left 

 valve larger than right and overlapping it dorsally and ventrally, 

 usually of distinctly different shapes; right valve hinge a simple bar 

 with dorsal groove, left valve hinge an incised groove with dorsal shelf 

 and ventroterminal triangular sloping platforms; adductor muscle- 

 scar pattern characteristically composed of 8-10 scars arranged in 

 three anterior plus one posteroventral rows of 2-3 scars each. 



Antennules 7-segmented, 3 terminal podomeres with tactUe setae 

 much longer than those of preceding podomeres. Antenna with 6 

 podomeres (endopodite with 4), sixth podomere completely fused 

 with stout posteroventral claw, carrying larger distal claw, antero- 

 distal seta, and 1 or 2 tiny simple setae. Mandible with masticatory 

 part of 4 stout trilobed denticles, 2 or 3 similar but less complex 

 denticles, and tiny setae; exopodite with 3 graduated feathered setae. 



