33 129 



Islands in the Gulf of Siani (L. Morlkt, loc. cit.). 



The Danish Expedition to Siam collected no specimens of this species. 



Distribution: — Mergui Archip., Ceylon (?). — Cochin China, Poulo-Condor, 

 Philippines, Amboina. All the other localities recorded in the literature should 

 no doubt be referred to "P. pectunculus L. (Edg. Smith.)" 



Edg. Smith (loc. cit.) is of opinion that Linné (under the name of Area pectun- 

 culus), Lamarck, and others have confused two well-distinguished Pectunculus species; 

 one species in which the interstices between the ribs are rather broad and well- 

 marked as shown, for example, in Savigny's figure (Descript. de l'Egypte, Coquilles, 

 pi. X, fig. 2), and another species (the one we are here considering) in which the 

 broad ribs stand close to each other, separated only by a groove, without any well- 

 marked interstices. Also, in the first-named species, the interior of the valves has 

 a strong reddish-brown colour on the hinge-plate below the teeth, a feature which 

 is said not to occur so pronouncedly in the other species; but I am in doubt how 

 far the latter is a constant character. 



Limopsis cancellata, Reeve. 



Pectunculus ccincelhitus, Reeve, Proc. Zool. Soc. London, XI, 1843, p. 188. 



— — Conchol. Icon., I, Pectunculus, Sp. 39. 



Limopsis cancellata, Rekve, Edg. A. Smith, Report on the LamcUibranchiata of the Challenger Expedit., p. 25G. 



— Woodwardi, A.Adams, Proc. Zool. Soc. London, 1SG2, p. 231 (fide Edg. Smith!. 



— — — DuNKEH, Index molluscor. mar. Japon., p. 237, pi. XVI, figs. 5 — G. 



— Philippii. A. Adams, Proc. Zool. Soc. London, 18G2, p. 230 (lide Edg. Smith). 



Area multistriata, Fouskâi., Descript. animal, quæ in itin. orient, oljserv., 1775, p. 123 (fide A. H. Cooke). 

 Pectunculus niultistriatus, ForskIl, Reeve, Conchol. icon., I, Pectunculus, Sp. 42. 

 Limopsis multistriata, Forskål, Savigny, Descript. de l'Egypte. Coquilles, pl.X, fig. 3. 



— — — juv., A. H. Cooke, Ann. and Mag. Nat. Hist, 5 Ser., vol. 18, 1886, p. 95. 



W. of Koh Kut, 30 fathoms, sand and mud (''/3). 



Long. 2—6 mm., alt. 2 — 6 mm. 



Distribution:— Singapore, Gulf of Manaar, Arabian Sea (lat. 18° 25' N., 

 long. 71° 45' E.; in 191 fathoms). Red Sea, Suez. — Japan, Torres Strait, Mast Head 

 Reef (Queensland), Port Jackson. 



Limopsis Tenisoni, Ten. Woods (= L. cancellata, Ten. Woods non Reeve) from 

 Tasmania and South Australia has been erroneously determined and referred to 

 L. multistriata. Forsk. ' by Tate and May. 



Fam. Mytilidae. 



Mytilus (Chloromya) viridis, L. 



Mgtilus viridis, Linné, Syst. Nat., ed. X, 1758, p. 706, No. 220. — Mus. Lud. Ulr. 17G4, p. 542, No. 138. — 

 Syst. Nat., ed. XII, 1767, p. 1158, No. 259. 

 — — — Hamlet, Catalogue of reo. biv. shells, p. 247. 



■ For further details cf. Proc. Roy. Soc. Tasnian., 1876 (1877), p. 156; 1877 (18791, p. 56. — Proc. 

 Linn. Soc. New Soutli Wales, 1901, p. 437. — Scient, results of the trawling expedition of H. M. C. S. 

 "Thetis" off tlie coast of New South Wales. Mollusca by C. Hedley, I, 1902. p. 297. 



I). K 1). Viilensk. SelsU. Skr., 7. R.Tekke, naturviilcnsU. o;; miithem. Afd. V. 3. 17 



