45 141 



Modiolaria (Gregariella) coralliophaga, (Chemn.) Gmel. 



Mißihts corallioplmgus, Chemnitz, Concbyl. Cabin., VIII, 17S.'), p. 174, pi. 84, fig. 752. 



— — — Gmelin, Syst. Nat., ed. XIII, 1790, p. 3359, No. 31. 

 Modiola semen, Lamarck, Anim. s. vert., éd. 2, VII, 183(i, p. 2(), No. 21. 



— opifex, Say (non Phii.ippi), Journ. Acad. Nat. Se-., Philadelphia, IV, 1825, p. 3()8, pi. 19, lig. 2. 



— — — Vekhill & Busch, Trans. Connecticut Acad. X, 1900, p. 516, pi. 58, fig. 3. 



— divaricata, Philiwm, Zeitschr. f. Malakozool., 1847, p. 115. 



— — — Abbild, u. Beschreib, neuer od. wen. gek. Conchyl. Modiola, p. 21 (7), pl. II 



flg. 8. 

 LilliiMlunuis (lioaricatus, Philippi, Reeve, Conchol. icon., X, Lithodomus, pl. V, Sp. 34. 

 Lilhophaga divaricata, Philippi, Mahtini u. Chemnitz, Conchyl. Cabin.. VIII Bd. 3 Abth. A, p. 2U. 

 Modiolaria - — Lischke, Japanische Meeres Conchyl., II, p. 148. 



At the north end of Koh Chang, 1 — 12 fathoms, in old coral blocks (6). 



Long. 7 — 13 mm. 



Distribution: — Japan, Nagasaki (Lischke). — East coast of America from 

 Cape Hatteras and the "Lesser Antilles" to Rio Grande do Sul. 



The specimens from the Gulf of Siam agree in all points with the specimens 

 from the West Indies. 



Fam. Pteriidae. 



Pteria spectrum, Reeve. 



Avicula spectrum, Reeve, Conchol. icon, X, 1857, Avicula, Sp. 59. 



— — — Dunker in Martini u. Chemnitz, Conchyl. Cabin., VII, 3 Abtli., 1872, p. 49, 



pl. 17, fig. 1. 



Koh Chuen, 30 fathoms (1). 



Long. 22 mm., alt. 11 mm. 



Distribution: — Philippines. 



I have compared the small specimen from Koh Chuen with Reeve's original 

 specimen in the British Museum, and although somewhat different I cannot see 

 that it can be referred to any other species than to P. spectrum, Reeve. 



Pteria serrulata, Dunk. 



Aoictda serrulata, Dunker, Zeitschr. f. Malakozoologie, V, 1848, p. 178. 



— — — Martini u. Chemnitz, Conchyl. Cabin., VII Bd. 3 Abtli., p. 18, ])1. 5, figs. 1—2. 



— lata, Reeve, Conchol. icon., X, Avicula, Sp. 5. 



Between Koh Mesan and Cape Liant, 5—9 fathoms (1). 



Long. 32 mm., alt. 24 mm. 



Distribution: — Moluccas, Torres Strait. 



Professor Ed. v. Martens, to whom I sent the specimen for comparison, writes 

 to me as follows: "wahrscheinlich lata Reeve, nur die Form des Ohrs passt nicht 

 recht." 



