236 140 
Circe (Crista) divaricata, CHEMNITZ, FiscHER, Catalogue d. Moll. de I’Indo-Chine, p. 231. 
Crista divaricata, CHEMNITZ, HipaLGo, Obras malacologicas, I, tom. II, 1903, p. 233, No. 337. 
— — — DauTzENBERG & FiscHER, Journ. de Conchyl., vol. 53, 1905, p. 458. 
Koh Mak, sandy coast (*/2). 
Long. 36 mm. 
Islands in the Gulf of Siam (Mortert). 
Distribution:— Singapore, Salang, Mergui Archip., Andamans, Madras, 
Gulf of Manaar, Bombay, Karachi, Persian Gulf, Gulf of Oman, Red Sea (?), Zanzibar, 
Mozambique, Natal, Seychelles (DaurzENBERG). — Poulo Condor, Annam, Philip- 
pines, Hong Kong, Shanghai, Japan (DunKkerR), Japan (Inland Sea, SrEarns). 
In spite of the statements of REEvE, SowerBy and IsseEx, it is doubtful 
whether C. divaricata, Ch., occurs in the Red Sea. Later authors do not record it 
with certainty from Aden or from the Red Sea. When PAGENSTECHER! says regarding 
this species: “Von sechs Exemplaren gehéren vier der Varietat gibba Lam., eins. 
der pectinata Lin. an,” he has evidently had other species before him. 
Tapes (Paratapes) papilionaceus, Lam. 
Venus papilionacea, Lamarck, Hist. nat. d. anim. s. vert., V, 1818, p. 594, No. 36. — éd. 2, VI, p. 352, No. 36. 
Tapes — —- Sowersy, Thesaurus Conchyl., II, p.679, No. 2, pl. 145, figs. 1—2. 
—  rotundata, Reeve, Conchol. icon., XIV, Tapes, Sp. 7. 
Venus papilionacea, LAMARCK, PPFEIFFER in Marrini u. CHEMNITZ, Conchyl. Cabin., XI Bd., 1 Abth., p. 167 
No. 33, pl. 15, fig. 6. 
Tapes (Textrix) papilionacea, LAMARCK, ROMER, Monogr. d. Moll. Venus, II, p. 21, No. 3, pl. 6, fig. 1. 
—  papilionacea, Lamarck, Crosse et Fiscuer, Journ. de Conchyl., vol. 40, 1892, p. 76. 
West coast of Cambodge in the Gulf of Siam (Pavie). 
Distribution: — Ceylon, Mauritius, Madagascar. — ‘New Holland,” West 
Australia. 
It is strange that this large, conspicuous, and well-known species, with the 
exception of the above quotation, has not been taken in the Gulf of Siam or adja- 
cent waters, either by the Danish Expedition or by others. Can it perhaps be due 
to erroneous determination of T. semirugatus, Phil., when the specimen collected 
by Pavig, is given as T. papilionaceus, Lam., by Crosse and FiscHer? 
Tapes (Paratapes) semirugatus, Phil. 
Venus semirugata, Puinipri, Zeitschrift f. Malakozoologie, IV, 1847, p. 88, No. 22. 
— -— -- Abbild. u. Beschreib., III, p. 24 (76), pl. 7, fig. 4. 
Tapes — — Sowersy, Thesaurus conchyl., Il, p. 681, No.9, pl. 145, fig. 12. 
~  (Textrix) semirugata, Puitipp!, ROMER, Monographie d. Moll. Venus, II, p. 29, pl. 9, fig. 1. 
(Paratapes) — -- Ep. Smiru, Report on the Lamellibranchiata of the Challenger 
Exped., p. 115. 
—  polita, Sowerby, Thesaurus conchyl., II, p. 682, No. 12, pl. 145, figs. 15—16. 
- — — Reeve, Conchol.icon., XIV, Sp. 49. 
' Ueber die von R. KossMANN am Rothen Meere gesamm. Moliusken, 1877, p. 40. 
