Ill 207 



The sound of Koh Chang, 3—5 fathoms, soft clay (^/s). N. of Koh Kong, 8 

 fathoms, mud (Va). 



Long. 14—48 mm. — (Long. 48 mm., alt. 37 mm., crass. 14 mm.) — (Long. 44 mm., 

 alt. 31 mm., crass. 15 mm.). 



Distribution:— Tranquebar (Spengler and Seidelin, Zool. Mus. Copen- 

 hagen), Manilla (Zool. Mus. Copenhagen). Edg. Smith writes to me: "I think 'Central 

 America,' the locality given by Hanley {T. giibernaculum) is a mistake. We have 

 it from Bombay." I believe here reference is made to the specimens from Bombay 

 determined by Melvill and Abercrombie' as Macoma truncata, Jonas. As M.trun- 

 cata, Jonas, is easily mistaken for the species we are here considering, some of 

 the localities given for truncata should undoubtedly be transferred to T. papyracea, 

 Spengl. 



As the original specimens of Spengler's papyracea are in the Zoological 

 Museum of the University of Copenhagen it has been possible for me to verify the 

 fact that the specimens from the Gulf of Siam belong to the same species. I sent 

 some of the specimens from the Gulf of Siam to Mr. Edg. Smith, and he kindly 

 informed me that they "agree with giibernaculum of Hanley;" consequently, it is 

 proved that Hanley's species should be regarded as a synonym of Spengler's 

 papyracea, which name has the priority. Mörch " states that T. truncata, Jonas, is 

 identical with T. papyracea, Spengl., but this is certainly wrong; truncata, according 

 to Jonas's diagnosis, presents several peculiarities which are undoubtedly charac- 

 teristic of that species. 



Tellina (Macoma) fallax, Berlin. 



Macoma fallax, V. Bertin, Revision d. Tellinidés (Nouv. Arcliives du Museum d'Histoire Naturelle, 2 Ser., 

 I, Paris), 1878, p. 343, No. 29, pi. 8, fig. 4. 



Sound of Koh Chang, 3—5 fathoms, soft clay (^'Vs). Between Koh Kahdat 

 and Koh Kut, 6 fathoms, clay mixed with sand (^^/a). 



Long. 5—29 mm. (long. 29 mm., alt. 17 mm., crass. 12 mm.). 



Distribution unknown. 



Although the shells from the Gulf of Siam do not reach the size of that 

 figured by Bertin, and although Bertin's brief diagnosis is not of much use as a 

 guide, I think I can safely refer my individuals to the present species, which has 

 undoubtedly often been confused with T. Candida, Lam. 



Tellina (Macoma) lilium, Hani. 



(PI. IV, Figs. 1-2) 



Tellina Lilium, Hanley, Proc. Zool. Soc. London, 1844, p. 147. 



— lilium, — Hanley in Sowerby, Thesaur. Conchy]., 1, p. 303, No. 158, pi. 58, fig. 85. 



— — — Reeve, Conchol. icon., XVII, Tellina, Sp. 174. 



' Mem. and Proc. of the Manchester Liter, and Phil. Soc, 4 Ser., vol. VII, p. 50. 

 2 Malakozoolog. Blatter, XVU, 1870, p. 116. 



