REVISION OF RECENT BAIRDIIDAE 75 



Affinities. — Very similar to the more caudate and punctate B. (B.) 

 cratericola also living at Nosy Be. 



Remarks. — One pathological specimen USNM 121339 has the 

 distal claw of the second thoracic leg duplicated in a fashion identical 

 with the antennal claws (Figure 37^). Presumably this is the result of 

 an injury; yet it confirms the close homologic relationship between the 

 antennae and thoracic legs suggested by the often identical configura- 

 tion of barbs or other details of distal termination and consistent 

 relative proportions of podomere dimensions. 



Bairdoppilata (Bairdoppilata) cratericola, new species 



Figure 39 



Etymology. — Latin crater, basin + -cote, dweller; for the Lac du 

 Cratere, Nosy Be, Madagascar; a picturesque wave-breached volcanic 

 crater. 



Type specimens. — Adult male holotype USNM 121342; para- 

 types USNM 121323. 



Type locality. — Nosy Be, Madagascar, sample 359 (washings of 

 dead coral fragments encrusted vnih living algae, sponges, corals, 

 and tunicates, from just below low tide level in the Lac du Cratere). 



Diagnosis. — Carapace fairly compressed, anterior and especially 

 posterior end produced in caudate fashion, exterior distinctly 

 punctate. 



Copulatory organ ^^'ith distal lobe approximately triangular in 

 outline, bearing no setae or other projections. 



Material. — Nosy Be; 7 living specimens, 203 subfossil specimens. 



Dimensions. — Adult male USNM 121342, left valve, length 

 0.88 mm, height 0.56 mm; right valve, length 0.89 mm, height 0.50 mm. 



Habitat. — Collected living only at the type locality. 



Subfossil distribution. — Abundantly distributed in carbonate 

 sands and sandy muds, especially near coral reefs. 



Affinities. — ^Very similar in carapace and appendage morphology 

 to B. (B.) alcyonicola, new species, another common species at 

 Nosy Be. 



Bairdoppilata {Bairdoppilata?) villosa (Brady), 1880 



Figures 40, 41a-c 



Bairdia villosa Brady, 1880, p. 50, pi. 3: fig. 3a-b; pi. 5: fig. 2a-f; pi. 8: 4a-f. 



Material. — Three valves and one whole carapace, all mature, in 

 Challenger slide 140, British Museum (Natural History) cat. no. 

 80.38, labeled as station 149, Balfour Bay, Kerguelen Island. The 

 whole carapace has been designated lectotype by H. S. Puri, Neil C. 

 Hulings, and Richard H. Benson (MS.). 



