282 186 
Gastrochena lagenula, LAMARCK, SOWERBY in REEVE, Conchol. icon., vol. 20, Gastrochena, Sp. 18, pl. 3, 
fig. 16 (not fig. 18 — G. ovata, Sow.).! 
pupina, DresHayes, Proc. Zool. Soe. London, XXII, 1854, p. 326, No. 39. 
— — Sowersy, Thesaur. Conchyl., V, 1887, p. 130, No. 25, pl. 470, fig. 16. 
~- = in Reeve, Conchol. icon., vol. 20, Gastrochcena, Sp. 17. 
Gastrochaena deshayesi, SrurAny, Lamellibranchiaten d. Rothen Meeres, 1899, p. 19, pl. 5, figs. 1—7.- 
NW. of Koh si Chang, 10 fathoms, mud (4). Between Koh Mesan and Cape 
Liant, 5—9 fathoms (6). Between Koh Mesan and Koh Chuen, 25—38 fathoms (4). 
S. of Koh Chuen, 380 fathoms, shells (1). W. of Koh Chang, 20 fathoms, mud (1). 
E. of Koh Mak, 20 fathoms, mud (3). W. of Koh Kut, 15 fathoms, mud (3). Coast 
of Koh Kut (1). 
Long. 12 mm. 
Distribution:— Coromandel Coast, Ceylon, Red Sea, Suez. — Hong Kong, 
Moreton Bay. 
Gastrochaena aequabilis, Sluiter,* from Krakatau is closely allied to the present. 
species. As SPENGLER’s original specimens of G. cymbium have been at my disposal 
I am certain of the correctness of the determination. 
Fam. Pholadidae. 
Pholas (Monothyra) orientalis, Gm. 
Pholas orientalis, GMELIN, Systema Naturae, ed. XIII, 1790, p. 3216, No. 7. 
_ a Lamarck, Hist. nat. d. anim. s. vert., V, 1818, p. 444, No. 2. — éd. 2, VI, p. 44, 
No. 2. 
Dactylina — Gray, Ann. & Mag. of Nat. Hist., 2 ser., VIII, 1851, p. 382. 
Pholas Orientalis, = — Sowersy, Thesaur. Conchyl., II, p. 486, No. 4, pl. 102, figs. 3-4. 
Monothyra orientalis, GMELIN, Tryon, Proc. Acad. Nat. Sc. Philadelphia, 1862, p. 205. — Catalogue of rec. 
Moll. Pholadacea, p. 3. c 
Pholas _ _— Reeve, Conchol. icon., XVIII, Pholas, Sp. 5. 
Phragmopholas orientalis, GMELIN, MoRLET, Journ. de Conchyl., vol. 37, 1889, p. 173, No. 91. 
Pholas (Dactylina) — — CLessin in MARTINI u. CHEMNITZ, Conchyl. Cabin., XI Bd., 4 Abth., 
p. 12, No.6, pl. 2, figs. 3—4. 
—  Indiae Orientalis, CHEMNiYz, Conchyl. Cabin., VII, 1785, p. 356, pl. 101, fig. 860. 
' On PI. 3 in “Conchologia iconica’” the numbers of No. 16 (G. ovata from Panama) and No. 18 
(G. lagenula from Ceylon), have been interchanged by a misprint; this has misled Srurany (who did 
not discover the error), so that he (loc. cit.) has established his species G. Deshayesi upon typical 
specimens of G. cymbium, Sp. (lagenula, Lam.). It is not surprising that CLEssin should copy this 
error in his Monograph, without comparing the diagnoses with the figures, when we recall the uncritical 
character of his Monographs of Bivalves in: Martini u. CHEMNiTz, Conchyl. Cabinet. Hepiey (Australian 
Museum, Sydney. Memoirs III, 1896 —1900, p. 508) characterizes CLEssin’s Monograph of “The Teredinide” 
as follows: “Even worse is an alleged Monograph by Cvessin in the Conchylien Cabinet, of which the 
text and illustrations disgrace that serial. The latter memoir is absolutely the worst zoological mono- 
graph I have read.” 
* C.P. Sturrer, Ueber d. Bildung d. Kalkréhren yon Gastrochaena. Natuurk. Tijdschrift vy. Nederl. 
Indie, 50 Bd., 1890, pp. 45—60, pl. 1. 
