174 FROF. E. VON MARTENS ON THE SHELLS 



Elphinstone and Sullivan Islands. Moluccas. 



The peculiar periostracum, not before noticed in this species 

 as far as I know, proves it to be also an inhabitant of brackish 

 water. 



66. Ltjcina (Anodontia) Philippinartjm, Hartley, Catal. Bee. 

 Bivalv. p. 348 ; Reeve, Conch. Icon. vi. pi. iv. fig. 18. 



Shell rather square, abruptly truncated before, somewhat solid, 

 compressed, encircled with regular concentric ribs at about equal 

 distances ; also covered with a distinct brown periostracum. The 

 impression of the hinder area often rather faint, but always 

 existing. Hinge-line rather solid ; ligament very thick. Largest 

 specimen 72 millim. high, 70 millim. long. 



Elphinstone Island, Sullivan Island in brackish water, in 

 company with Cyrena. Kisseraing, on mud-flats. Singapore, 

 Philippines. 



Lucina induta, Stoliczka, from Port Canning, is, according to 

 specimens received by the author, a dwarf variety of this species. 

 Cycladichama luciniformis, Valenciennes, Voy. au Pole Sud, Moll, 

 p. 116, pi. 26. fig. 3, from the Philippines, resembles also these 

 two species, but is provided w r ith distinct teeth in the hinge, 

 which are wanting in both ; and differs also somewhat in its 

 outlines. 



Tellinid^:. 



67. Tellina (Macoma) bikmanica, Philippi, Abbildungen,Tel\. 

 pi. 5. fig. 1 ; Reeve, Conch. Icon. vol. xvii. pi. xxxii. fig. 177. 



Mergui, mud-flats. Mergui. 



MactridjE. 



68. Lutraria elonoata, Gray, Reeve, I. c. viii. pi. i. fig. 2. 

 More elongated, thinner, and more convex than most other 



sepcies of this genus ; periostracum pale yellowish grey ; rather 

 small, 40 millim. long, 16£ millim. high. 

 Minthautoung, near Mergui. 



Burrows on the banks of tidal estuary of Tenasserim river. 



I'lIOLADIDiE. 



09. Teredo (Calobates) thokacites, Oould, JProc. Boston 

 S'jc. Nat. Hist. vi. j>. 15; Wright, Trans. Linn. Soc. xxv. i860, 

 pi. 64. figs. 6-12. 



Klphinstone island, from trunks of old mangrove. Tavoy. 



