} !; 



them.-elves t man-rove POOtS, Weedfi, etc., ly me;i! 

 jrlutinous filament- proceeding from under their closed operculum 

 (PI. L9,fij 



SulL r enu> TYMFAKOTOKOB, Klein., 17~>:;. 



Shell with angular, >pino>c whorls ; columclla twisted, canal 

 short: outer lip broadly sinuated anteriorly, and less distinctly BO 

 \nimal with frin-vd siphon. P. FUSCATUB, Linn. 



Suhirenus PyuA/rs, Montfort, 1810. 



Wliorls angular; aperture with a short anterior canal, prolonged 

 P..-I, -rio rly : outer lip thickened, expanded. Animal with fringed 

 siphon. P. EBENTNU8, Hru.ir. 



Suhp-inis PYKA/ISINTS, lleil])rin, 1886. 



id>iiiiiiL!- the general characters of Tympanotonufl and Tere- 

 Jiralia, ditlerin^ from the former in the non-canaliculate character 

 of the aperture, and from the latter in the possession of a deep sinus 

 in the lahrum, which is effuse, thickened, and carried completely 

 <vcr to the lahium. so as to enclose a round siphonal apertui 

 >eeii in Teivhralia. 



P. CAXPANULATU8, Ileilprin (PI. 19, fig. 10). Tertiary, Florida. 



SulLfenus TI;KI:I;I;AI.IA. Swainson, 1840. 



Shell with exterior varices and corresponding interior teeth, 

 surface spirally channeled ; aperture channeled behind, with short 

 iinterior canal : li]> curved, dilated in front and prolonged so as to 

 partially close the canal; columella with strong plications corre- 

 ^jH.nilin.ir to the teeth on the interior of the outer wall i PI. 1!), fig. 



P. PALUBTRIB, Hru_L r ., occurs in --real numhers in the salt mar>lu- 

 of the Ka-tern Archipelago, and is assiduously collected hy the 

 natives, who roast them and suck the contents of the shell through 

 :in aperture made liy l)reakiiiL r off the tip of the spire. 



The internal teeth do not approach the aperture, and are only 

 d l>y makini: a longitudinal section of the >hell. They 

 found in any of the related groups. 



The L r,., m . liiiM-nx. II. Adams, l>i:;. i- fouinleil on M, I,I,,'KI JXK/U- 



<Jii/u,( iriuM, a I in run - mMini: in general form / 



hfili-i lfniiiti'1/ilf!, \'al. Adam- >ay> that it has a muhi-piral 



operculum, and therefore placrs it under the al>ove name in the 



with Dr. Hrot that the specirs has >o com- 



