140 CEYLON PEARL OYSTER REPORT. 



TEMNOPLEURID/E. 



Teinnopleurus toreumaticus (Leske). 



A number of small Temnopleurids, which probably belong to this species, were 

 obtained (1) south of Galle, in deep water, and (2) at Station LXIII., west of Periya 

 Paar, 36 fathoms, 9 specimens, of l - 5 centims. to 2 centime, diameter. 



Temnopleurus, sp. ? 



Some small cream-coloured Temnopleurids were obtained from Station XV., on 

 Periya Paar, 9 fathoms; 10 miles off Galle, in deep water; on the Cheval Paar (off 

 Aripu), 7 fathoms; and at Station I., west of Negombo, 12 fathoms to 20 fathoms. 



Salmacis bicolor, Agass. 



This species was obtained (1) off Galle, Station XXXIX., depth 16 fathoms to 

 30 fathoms; (2) south-west of Periya Paar, Station LV., depth 11 fathoms to 

 24 fathoms ; (3) at various localities on Cheval Paar and other pearl banks off Aripu, 

 depth 6 fathoms to 7 fathoms; and (4) at Station XVIII. , in Palk Bay, 7 fathoms. 



The specimens range from 1 centim. to 6 '5 centims in diameter. 



Salmacis dussumieri, Agass. 



This species was obtained (1) at Station II., north-west of Negombo, 8 fathoms, 

 12 specimens, from 2 centims. to 4 centims. in diameter; (2) at Station XLVIII., 

 between East and West Cheval Paars, depth 7 fathoms, many specimens, ranging 

 from 0'5 centim. to 2"5 centims. in diameter ; (3) at Station LXIII., west of Periya 

 Paar, 36 fathoms ; and at several other places on the pearl banks. 



Salmacis sulcata, Agass. 



Specimens were obtained (1) at Station I., off Negombo, 12 fathoms to 20 fathoms, 

 3 specimens, 1*5 centims. to 2 - 5 centims. in diameter; (2) at Station XLVIII., on 

 the Cheval Paar ; and at other localities amongst the pearl banks off Aripu, depths 

 6 fathoms to 8 fathoms, many specimens, ranging from 1 centim. to 4 centims. in 

 diameter. 



TRIPLECHINIDyE. 



Toxopneustes pileolus (Lamk.). 



Three specimens were dredged in the Gulf of Manaar, from Station LV, south-west 

 of Periya Paar, 11 fathoms to 24 fathoms; on North-west Cheval Paar, 8 fathoms; 

 and again on Cheval Paar, 7 fathoms. They range in diameter from 7 - 5 centims. to 

 10 centims. 



Most of the pedicellaiue of this species are very remarkable and striking, both in 

 size and colour, when seen alive. They show the three valves connected by a large 

 discoid membranous extension, which is of a beautiful deep-red colour edged by a 



