NO. 1983. PHILIPPINE MOLLUSKS OF GENUS DIMYA—BARTSCH. 307 

 On LIMA (CALLOLIMA) DALLI Bartsch. 



Station 5135, off Jolo Light (lat. 6° 11' 50" N.; long. 121° 08' 20" 

 E.), in 161, fathoms on fine coral sand bottom; bottom temperature 

 57° A. Cat. No. 254980, U.S.N.M. 



Station 5198, off Baliscasag Island (lat. 9° 31' 50" N.; long. 123° 

 39' 45" E.), in 220 fathoms, on green mud bottom; bottom tempera- 

 ture 53°.9; density of water at bottom 1.02500. Cat. No. 256975, 

 U.S.N.M. 



Station 5371, off outer Tayabas Light (lat. 13° 49' 40" N.; long. 

 121° 40' 15" E.). Sounding not made; depth taken "from chart which 

 says 83 fathoms. (This is probably incorrect,»for all the other Giant 

 Limas were taken at much greater depth.) Bottom, green mud. 

 Cat. No. 254978, U.S.N.M. 



Station 5503, off Macubalan Point Light, Mindanao (lat. 8° 36' 26" 

 N.; long. 124° 36' 08" E.), in 226 fathoms, on green mud bottom; 

 bottom temperature 53° .3. Cat. No. 254976, U.S.N.M. 



Station 5516, off Point Tagolo Light, Mindanao (lat. 8° 46' 00" N.; 

 long. 123° 32' 30" E.), in 175 fathoms, on globigerina bottom; bottom 

 temperature 54°.3. Cat. No. 254974, U.S.N.M. 



Station 5519, off Point Tagolo Light, I^Iindanao (lat. 8° 47' 00" N.; 

 long. 123° 31' 15" E.), in 182 fathoms, on globigerina and sand bot- 

 tom; bottom temperature 54°.3. Cat. No. 254979, U.S.N.M. 



On cinders and empty bottom. 



Station 5243, off Uvian Island (lat. 6° 50' 55" N.; long. 126° 14' 

 35" E.), in 281 fathoms, on gray mud bottom; bottom temperature 

 63°.6; density at bottom, 1.02468. Cat. No. 229321, U.S.N.M. 



Station 5282 yielded some loose valves, off Malavatuan Island (lat. 

 13° 53' 00" N.;' long. 120° 26' 45" E.), in 248 fathoms, on dark gray 

 sand; bottom temperature 47°.4; densit}^ at bottom, 1.02517. Cat. 

 No. 230109, U.S.N.M. 



EXPLANATION OF PLATES. 



Plate 27. 



Dimya lima Bartsch on Lima {Callolima) smiihi Bartsch. The specimen with the 

 arrow is the type. 



Plate 28. 



All figures enlarged three diameters. 



Fig. 1. Dimya filipina, external view of lower valve. 



2. Dimya filipina, external view of upper valve. 



3. Dimya filipina, internal view of upper valve. 



4. Dimya filipina, internal view of lower valve. 



5. Dimya lima, internal view of upper valve. 



6. Dimya lima, internal view of lower valve. 



