i§3 



in the figures at my disposal, and last not least, the specimens received for comparison of 

 Mr. Dautzenberg and of Mrs. J. C. Melvill and E. R. Sykes, the specimen from Stat. 241 

 more resembling the specimens of Dautzenberg and Sykes by its stronger, shorter, more remote, 

 concave riblets between the sutural and next keel, while the specimens from Stat. 137, of which 

 one is a beautiful shell containing the soft parts, better agrees with Mr. Melvill's specimens, 

 with weaker, longer, more crowded riblets in the same space, these riblets being nearly straight 

 and only curved in their basal part, in this respect more resembling S. ercmita Verrill (Trans. 

 Conn. Acad. Vol. VI, PI. 31, fig. 15); these latter specimens have the subsutural liration but 

 very little developed, much less so than in the specimens of Dautzenberg and part of those 

 of Sykes, which are slightly variable in this respect. 



Fam. Vermetidae. 



This family is perhaps the most disagreeable amongst Gastropods to deal with; the 

 extreme variability in the majority of the species and the often vague descriptions, render it 

 impossible in many cases, to make safe identifications, except in a few instances, if the species 

 have prominent characters. Many of the names applied below are more or less doubtful and not 

 a few specimens must remain without name. In vain I hoped that the keeper of the mollusca in 

 the British Museum, where the types of Mörch are preserved as far as I know, with his usual 

 kindness should give me assistance, but he wrote me he knew nothing about that family ; and 

 though " nothing" will probably be too strong an expression, I could not get the hoped for certainty. 



Tenagodus Guettard. 



1. Tenagodus (s. str.) ponderosus Mörch. 



MÖRCH. Proc. Zool. Soc. Lond. 1860, p. 409. 



REEVE. Conch. Ie. Vol. XX, Siliquaria, fig. 3. 



Tryon. Man. of Conch. Vol. VIII, p. 188, PI. 57, fig. 11. 



Stat. 273. Pulu Jedan, East coast of Aru-islands. 13 M. Sand and shells. 5 Spec. 



The specimens agree very well with the quoted figures, though they are smaller, sur- 

 passing however considerably the other East-Indian species in size. The species has only been 

 recorded from Australia. 



2. Tenagodus (s. str.) trochlearis Mörch. 



Mörch. Proc. Zool. Soc. Lond. 1860, p. 408. 

 REEVE. Conch. Ie. Vol. XX, Siliquaria, fig. 4. 

 Tryon. Man. of Conch. Vol. VIII, p. 189, PI. 57, fig. 14. 



Stat. 66. Bank between islands of Bahuluwang and Tambolungan, South of Saleyer. 8 M. 



Dead coral, Halimeda, Lithothamnion. 1 Spec. 

 Stat. 125. Sawan, Siau-island. 27 M. Stone aild some Lithothamnion. 1 Spec. 

 Stat. 144. Damar-island. 45 M. Coral-bottom and Lithothamnion. 2 Spec. 



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