MACROCERAMUS, HAITI. 121 



b. Outlines of spire more or less convex; a 

 series of brown spots at the periphery and 

 above the suture, with some scattered dots 

 and streaks ; upper whorls with fine, thread- 

 like striae, lower ones smoothish; 14x4.3 to 

 17 x 4.5 mm., whorls 10-12. Santo Domingo. 



M. ludovici, no. 11. 



6 1 . Similarly colored, but more tapering and 

 acute; thread-striate throughout; 11 x 3.7 

 mm., with 9y 2 whorls. 



M. ludovici var., no. Ha. 



fe 2 . Outlines of spire somewhat convex; white 

 with spots in oblique rows, 3 or 4 in a row ; 

 strongly ribbed; 15 x 4.7 mm., with 12 

 whorls. S. Domingo. 



M. cyrtopleurus, no. 10. 



6 3 . Tapering from last whorl, the lateral out- 

 lines slightly convex ; white with a few brown 

 spots in pairs, or gray-brown with the spots 

 united into streaks, and cream-bordered on 

 one side. A distinct but low keel ; sculptured 

 with rather strong but low riblets, malleate 

 between them ; 10-11 x 4 mm., with 10 whorls. 

 Port-au-Prince. M. klatteanus, no. 12. 



6 4 . Tapering, gray-white, sculptured with coarse 

 striae; a distinct basal keel; length 14 mm. 



M. unicarinatus, no. 13. 



6 5 . Rather straightly tapering, buff -whitish 

 spotted and tinted with ashy-brown; sculp- 

 tured with distinct, irregular ribs; a basal 

 keel; 14 x 5 mm., with 12-13 whorls. 

 Gonaives. M. costatus, no. 14. 



fc 6 . Conic- turrite, obliquely striatulate; white 

 with longitudinal, interrupted, corneous 

 streaks; suture crenulate; an obtuse keel; 

 13 x 5 mm., with 9 whorls. Jeremie. 



M. angulatus, no. 15. 



