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 (Brazier), New 

 Caledonia, Viti Isis. 



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 witli 

 H. Adams' Tellina Isseli from the Red Sea (Proc. Zool. Soc. London, 1870, p. 790, pi. 48, 

 fig. 10). A. H. Cooke and Sturany consider T. Savignyi, Ad. (from the Red Sea), to 

 be identical with T. pinguis, Hani.; 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 T. halaustina L. (and T. Isseli, H. Ad.) 

 are much more closely related to T. pingnis. It is almost impossible to dislinguisli 

 between specimens of balaustina (from Algiers) and of pinguis from the Gulf of 

 Siam. 



Tellina (Arcopagia) Isseli, H. Ad. 



Tellina {Arcopayia) hseli, H. Adams, Proc. Zool. Soc. London, 1870, p. 790, pi. 48, fig. 10, 

 Arcopagia Isseli, H. Adams, V. Beiitin, Revision d. Tellinidé.s, p. 324, No. 26. 

 Tellina — — Edg. Smith, Proc. Zool. Soc. London, 1891, p. 395, No. 15. 



— [Arcopagia) Isseli, H.Adams, Mri.vill and Standen, Proc. Zool. Soc. London, 1906, p 821. 



Koh Kahdat, 1 fathom, sand (1). 



Long. 9 mm. 



Distribution: — Bombay (Melvill, Brit. Mus.), Mekran coast, Gulf of Oman, 

 Persian Gulf (Melvill & Standen), Aden, Red Sea, Gulf of Suez. 



When Edg. Smith in 1891 published "On a Collection of Marine Shells 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, Hani. 



Tellina mix, Hani.ey, Proc. Zool. See. London, XII, 1844, p. 62. 



— — ~ SowERBY, Thesaurus Conchyl., I, p. 251, No. 54, pi. 56, fig. 33. 



— — — Reeve, Conchol. icon., XVII, Tellina, Sp. 76. 



— Nux, — Römer in Martini u. Chemnitz, Conchj'l. Cabin., X Bd., 4 Abth., p. 88, No. 53. 

 Arcopagia mix, Hanley, V. Behtin, Revision d. Tellinides, p. 321, No. lU. 



Tellina — — Dunker, Index moUuscor. mar. Japon., 1882, p. 191. 



Arcopagia Nux, — Hidalgo, Obra.s malacologicas, I, torn. 11, 1903, p. 151, No. 266. 



> Proc. Zool. Soc. London, 1891, pp. 390-436. 



