192 96 
N. of Koh Kam, 5 fathoms, gravel (1). Off Koh Kam, 10 fathoms, gravel (1). 
Koh Kahdat, 1 fathom, sand (1). 
Long. 11—13°5 mm. 
Distribution: — Philippines, Torres Strait, New Guinea (BRAzrER), New 
Caledonia, Viti Isls. 
The specimens are covered with a thin epidermis which is ornamented with con- 
centric elevations separated by fairly regular intermediate spaces (about 0.5—1 mm.); 
these elevations show most distinctly towards the ventral side, as the greater part 
of them is worn off upon the umbones, where they have left only concentric 
lines, which are, however, distinctly visible. Upon two of the specimens several 
red rays may be seen; and one of these two agrees almost completely with 
H. Apams’ Tellina Isseli from the Red Sea (Proc. Zool. Soc. London, 1870, p. 790, pi. 48, 
fig. 10). A. H. Cooke and Srurany consider 7. Savignyi, Ad. (from the Red Sea), to 
be identigal with T. pinguis, Hanl.; this I can scarcely believe, but as I have only, 
descriptions and figures to judge from, I cannot make any conclusive statement 
regarding this point; but it appears to me that 7. balaustina L. (and T. Isseli, H. Ad.) 
are much more closely related to T. pinguis. It is almost impossible to distinguish 
between specimens of balaustina (from Algiers) and of pinguis from the Gulf of 
Siam. 
Tellina (Arcopagia) Isseli, H. Ad. 
Tellina (Arcopagia) Isseli, H. Avams, Proc. Zool. Soc. London, 1870, p. 790, pl. 48, fig. 10, 
Arcopagia Isseli, H. AvaAMs, V. Bertin, Révision d. Tellinidés, p. 324, No. 26. 
Tellina — — Epa. Smiru, Proc. Zool. Soe. London, 1891, p. 395, No. 15. 
—  (Arcopagia) Isseli, H. ADAMS, MELVILL and SranpeEN, Proc. Zool. Soc. London, 1906, p. 821. 
Koh Kahdat, 1 fathom, sand (1). 
Long. 9 mm. 
Distribution: — Bombay (MEtyviLt, Brit. Mus.), Mekran coast, Gulf of Oman, 
Persian Gulf (Metvirt & STANDEN), Aden, Red Sea, Gulf of Suez. 
When Ene. Smirx in 1891 published “On a Collection of Marine Shelis from 
Aden”! he said regarding this species: “I am not aware that it has been found any- 
where except in the Gulf of Suez.” But, as may be seen from the above list of 
distribution, it has since been recorded as occurring considerably farther towards 
the east. 
Tellina (Arcopagia?) nux, Hanl. 
Tellina nux, HANuEy, Proc. Zool. Soc. London, XII, 1844, p. 62. 
—_ — - Sowerby, Thesaurus Conchyl., I, p. 251, No. 54, pl. 56, fig. 33. 
~— — Reeve, Conchol. icon., XVI, Tellina, Sp. 76. 
— Nuxy, — ROmer in Martini u. CHemnirz, Conchyl. Cabin., X Bd., 4 Abth., p. 88, No. 53. 
Arcopagia nux, HaNnuiry, V. Bertin, Révision d. Tellinidés, p. 321, No. 10. 
Tellina _ Dunker, Index molluscor. mar. Japon., 1882, p. 191. 
Arcopagia Nux, - HipaiGo, Obras malacoldégicas, I, tom. Il, 1903, p. 151, No. 266. 
' Proc. Zool. Soc. London, 1891, pp. 390—436. 
