130 



neo sphacelata, apice obtuso, anfractibus quinque, apertura 

 lata. 



Shell oblong, somewhat pyramidal, smooth, white with 

 chesnut patches, apex obtuse ; volutions 5, aperture broad. 

 St. Vincents, Rev. L. Guilding, in my own collection. 



53. Col. rugosa Sow. (pi. xxxviii. f. 114, 115.) Z. P. ii. 

 p. 115. 



Col. testa oblonga, medio gibbosula ; epidermide fusca, 

 spirne apice plerumque eroso ; anfractibus 7 3 longitudinaliter 

 costato-rugosis ; ultimo infra spiraliter costato, superne longi- 

 tudinaliter costato, costis omnibus superne unituberculatis ; 

 apertura sub-aperta. 



Shell oblong, rather gibbous in the middle ; with a fuscous 

 epidermis, apex of the spire generally eroded ; volutions 7> 

 longitudinally ribbed or wrinkled, the last transversely ribbed 

 in front and longitudinally ribbed posteriorly ; all the ribs 

 posteriorly tuberculated ; aperture rather wide. 



Found under stones at Panama and Xipixapi, H. Cuming. 



54. Col.variaSW. (pi. xxxix.f. 116, 117.) Z. P.ii. p. 116. 



Col. testa oblonga, decussato-costata, apice acuminato ; 

 anfractibus 8 — 9 fuscis, albido variegatis, longitudinaliter cos- 

 tatis, interstitiis costarum sulcatis ; apertura sub-ovali ; labii 

 externi extus incrassati margine superne emarginato. 



Shell oblong, cross-ribbed, apex acuminated, volutions 

 8 — 9, fuscous varied with whitish, longitudinally ribbed, inter- 

 stices of the ribs grooved; aperture nearly oval; outer lip 

 thickened externally ; its edge posteriorly emarginated. 



The ribs cease a little below the middle of the last volution. 



Found under stones at Panama, H. Cuming, 



55. Col. scalarina Sow. (pi. xxxix. f. 118.) Z. P. ii. p. 116. 



Col. testa ovata, longitudinaliter costata, spira pyramidali, 

 anfractibus 6- — 7, superne contabulatis, longitudinaliter cos- 

 tatis, interstitiis costarum decussatis, costis ad basin continuis ; 

 apertura coarctata, superne emarginata. ; peritremate intus 

 denticulato ; denticulis superioribus majoribus. 



Shell ovate, logitudinally ribbed, spire pyramidal, volutions 

 6 — 7> flattened posteriorly, longitudinally ribbed, interstices 

 of the ribs crossed ; ribs coutinued on the base ; aperture 

 contracted, posteriorly emarginated; peritreme denticulated 

 within, posterior teeth the larger. 



Found under stones at Panama and Chiriqui, H. Cuming. 



