288 192 
and Koh Kut, 6 fathoms, clay mixed with sand (1). W. of Koh Kut, 15 fathoms, 
mud (2). Off Koh Kut, 5 fathoms (fragments). 
Long. 26 mm. (several of the fragments have belonged to larger specimens). 
Distribution: — Singapore (Danish Exp. to Siam, 2 specimens), Nicobars, 
Ceylon, Mekran Coast, Aden, Red Sea, Suez, Suez Canal. — Philippines, Japan (A. 
flexuosa), Borneo, Flores. 
The species here under consideration varies considerably, especially with 
regard to the form and the development of the rostrum; and many species of the 
gen. Anatina will certainly in the course of time be withdrawn owing to their 
having been based upon entirely individual characters. The greater part of the 
specimens from the Gulf of Siam resemble most nearly ReEEve’s figure of A. eximia. 
Fam. Clavagellidae. 
Brechites dichotomus, Chenu. 
Aspergillum dichotomum, CHeEnu, Illustrations conchyliologiques (1843—45), Aspergillum, p. 3, pl. 2, fig. 6. 
Brechites dichotomus, _— H. & A. Apams, Genera of rec. Moll., Il, 1858, p. 339. 
Aspergillum dichotomum,  — Reeve, Conchol. icon., XII, 1860, Aspergillum, Sp. 9. 
Penicillus dichotoma, = Tryon, Proc. Acad. Nat. Sc. Philadelphia, 1861, p. 59, No. 2. 
Aspergillum dichotomum, = — Ciessin in Marrini u. CHEMNITZ, Conchyl. Cabin., XI Bd., 4 Abth. A, 
p. 30, No. 9, pl. 12, fig. 2. 
Koh Lan, 30 fathoms, mud (1). Koh Chuen, 30 fathoms (3). N. of Koh Kahdat, 
4—5 fathoms, coarse sand (1). Koh Kahdat, 1 fathom, sand (1), S. of Koh Mak, 
5—6 fathoms (2). 
All the specimens collected were fragmentary. 
Distribution:-—— Singapore (Cumina), Gulf of Manaar (THurston). 
Tryon (loc. cit.), undoubtedly correctly, considers B. disjunctus, Desh., to be 
synonymous with B. dichotomus, but several other of those species which have 
been established ought probably also to be abolished; thus Gray’ has united 
under the name of Penicillus aquaria, Burr.:— Aspergillum dichotomum, Chenu, 
semifimbriatum, Chenu, sparsum, Sow., javanum, Gray (non Lam.). 
Order Septibranchiata. 
Fam. Cuspidariidae. 
Neaera Singaporensis, Hinds. 
Necera Singaporensis, Hinps, Proc. Zool. Soc. London, XI, 18438, p. 77. 
W. of Koh Chuen, soft clay and mud (‘/2). W. of Koh Chang, 30 fathoms (*/2), 
Koh Kahdat (‘/2). N. of Koh Kut, 10 fathoms, mud (*/2). Between Koh Kahdat 
1 Proc. Zool, Soc. London, 1858, p. 312. 
