POTAJOD L59 



I'. LAM M: KM. Valcnc. IM. 81, fig. 



l':i\\n r liirht chocolate color, whorls shouldered, plicate. .-l<ij. in- 

 to ;i peripheral double angle, with a double line nf .-mall tabercltt, 



Length, 1 '."..") in. 



( 'mitt of ( 'UIIKIIKI, I '',,1 :iifla. 



Subgenus TYMPAN oroNoe, Klein., 17">-';. 



\\ PTO LTUB, Linn. IM. 81, ti-. 84 



Solid, spinosely t uberculated in the middle of the whorls, with 

 spiral rows of granules ahovc and below the suture, body whorl 

 with two rows of granules below tin- peripheral angle, 1)886 closely 

 >jirally ridu-t'd ; cjiidennis thick, chocolate brown, aperture yellow- 

 ish white. Length, 2'o in. 



Gambia, Cape Palmas, W. Ajr'n-n. 



1\ nnirioitu.^ Hrn.ir., and /'. <'!n(/n/iit)i, (Jinel., are synonyms. 



P. IIADII.A, Linn. PL 31, figs. 35, 36. 



Spirally ridged, and headed by the crossing of longitudinal rib- 

 lets, whorls concavely channeled below a sutural row of beads, base 

 spirally ridged; epidermis dark chocolate color. Length, 1/75 in. 



W. Afrlrn. 



Different as this appears from the preceding species, the speci- 

 mens before me almost prove a transition from one into the 

 other. /'. ti rrhr//a, Gmel., P. granulatus, Brug., P. Jtin'i<itil!.*, and 

 1\ iiciiffatus, Gmel., P. Oivenii, Fer. (fig. 36), are synonyms. 



P. HoMoumrM, Bayle. PL 31, fig. 37. 



Narrower, more cylindrical than the preceding species, sculpture 

 Hinilar in pattern, but more minute; variegated chocolate and 

 white. Length, T75 in. 



W. (.'<Ki*t tf Africa. 



This is 1*. nutoigranonu, Sowb., preoccupied by Deshayes for a 

 I species. 



P. i i.t \ IATII.IS, Potiez et Michaud. PL 31, figs. 38-40; PI. :}>. 

 figs. 4u. 51, 52. 



Whorls flattened, with deeply incised suture, each with three flat- 

 topped spiral ribs, tuberciilated in longitudinal rows, tubercles 

 >lete on the back of the body whorl except a sutural row, ba-e 

 -pirally ridded ; aperture in the adult expanded, angularly pro- 

 duced above, oblique, outer lip produced below; yellowish white or 

 glauCOUB, narrowly banded with chocolate, sometimes white-handed 

 at the suture. Length, 2 in. 



