collected in the Gulf of Suez. ` 127 
Until the animals of Monoptygma, Myonia, and Agatha 
shall have been examined, it is difficult to say whether they 
should be placed in Pyramidellidze or Actæonidæ. 
Genus AGATHA, A. Ad. 
A. vitrea, A. Ad. 
A. testa subulata, alba, vitrea, semipellucida ; anfract. 6, planulatis, 
suleis transversis distantibus exaratis ; apertura elongato-ovata, 
antice producta et effusa; labio in medio oblique subplicato. 
Hab, Gulf of Suez. 
This is a species of a group of shells of which A. virgo, A. 
Ad., is the type. They are beautiful white, polished, vitreous 
shells like elongated Actwones or, rather, Myonic, but without 
the sculpture peculiar to those forms. 
Genus MonMULA, A. Ad. 
M. Macandree, A. Ad. 
M. testa subulato-turrita, crassa, solida, rissoidea, alba; anfract. nor- 
malibus 11, planis, hic et illic valde varicosis, longitudinaliter 
costatis, transversim totis liratis, fasciis duabus rufis ornatis; 
apertura subquadrata ; labio spiraliter tortuoso ; labro extus valde 
varicoso, margine ar 
Hab. Gulf of Suez. 
This shell agrees dira: with the Mormula egregia, A. 
Ad., from the Philippines (Proc. Linn. Soc. Zool. vol. vii. h 
but specifically it differs i in Fea whorls being ornamented with 
but two red-brown bands instead of three, and being provided 
an and there with strong conspicuous yee M. rissoina, 
A. Ad. (Proc. Linn. Soc. Zool. vol. vii.), from Japan, Lancea, 
Sp., Pse., from the Sandwich Islands, ui FT Proto 
Cornelliana, Newcombe (Am. : ourn. Conch. 2 v. pl. 17. f. 3), 
are examples of the same ‘Andrew’s 
specimens the little embryonic indeed. ell i is Fire shown— 
proving the genus to belong to m It most nearly 
resembles Turbonilla; but the imer li "d te lew and 
simple as in that group. Pyramidella Sow. 
Thes. Mon. Pyram. a 172. f. 16,17), and d Pyranidell am- 
bigua, Gould (Otia iod: p. 60), also belong to this genus. 
Genus TURBONILLA, Risso. 
l. T. bifasciata, A. Ad. Ann. & Mag. Nat. Hist. 1861. 
Hab. Gulf of Suez (M*Andr.), China (A. Ad.). 
