218 



ox THE TOPOGRAPHY AND GEOLOGY 



A conipamtivelj small shell, with a rather short canal and distinguishable by its 

 more numerous and nearly straight ribs, and fine cross sculpture. , 



TURBINELLA. Lam. 

 T. valid a. Sby. ... ., 



Turbinellus validus, Sby., Quart. Joui-. Vol. VL, i). 50. ^ . ■ 



Differs from T. scolymus in its greater number of tubercles. The specimens 

 differ also among themselves somewhat, in the chai"acter of the inner lip. In some 

 cases it is hardly encrusted, while in others it is covered with an enormous plate with 

 a free edge. 



T. ovoid e a. Kiener. Icon. Coq. viv. p. 7, pi. 17, fig. 7. 



]^ot rare. It is reported from the coast of Brazil, and I am not aware that it 

 occurs now in the West Indies. 



" VASUM. Bolt. 



v. Haitensis. Sby., sp. , - : 



Turbinelhis Haitensis. Sby. Quart. Jour. Vol. VL, p. 50. - ■ 



Closely allied to T. muricata, fi-om which it differs in one constant charactei-. In 

 that species the suture is considerably below the angle of the preceding whorl; in this, 

 the suture ahvays follows the extreme outer angle. , , . 



V. tuberculatum. Gabb, ii. s. 



Shell large, ponderous, broad ; spire elevated, half as long as the mouth, whorls about eight or nine ; broadly 

 angulated, concave and sloping above, bearing a few very large tubercles on the angle ; body whorl tapering rapidly 

 below the angle and strongly ridged in advance. Surface covered with a few revolving lines. Aperture broad behind, 

 narrowed in advance and expanded at the termination of the anterior ridge. Inner lip with four or five large folds. 

 Length 4 inches, width 3 inches. ' . - ■ ' " ■ / . • ■ 



Allied to T.caestus, but differs in having but six veiy large tubercles on the angle 

 instead of many, as in that species. . 



V. U o m i n i c e n s i s. Gabb, n. s. 



Shell small, very robust ; spire about as long as the mouth in old shells, not so long in the younger stages , whorls 

 10, concave above, angulated ; body whorl convex in the middle, concave in advance and broadly unibilicated : 

 surfaces marked by about 7 larger slightly oblique longitudinal ribs, more or less tuberculatc on the angle and crossed by 

 numerous revolving ribs, the whole rendered more or less squamose by lines of growth ; there is a larger revolving 

 rib or row of tubercles in advance. Aperture elongate-oval ; inner lip covered with a heavy plate, with four trans- 

 verse folds. Length 2.5 inches, width 1.5 inch. 



The high spire and small size of this shell render it entirely unlike any other 

 with which I am acquainted in the genus. 



LAGENA. Schum.* 



L. rhoniboidea. Gabb, n. s. 



* I have elsewhere expressed my disapproval of the use of names of such authors as Klein , who were only by accident binomial; who only used a 

 single word for a specific name occasionally, and whose names are not seldom a whole phrase or even a sentence. H. and A. Adams use for this genus 

 Leucozonia of Gray since Klein had used Lagf.na elsewhere. But if we follow Gray and Adams in adopting Klein's names, we must , with the latter 

 also use those of Aldrovandus ; and since he quotes Aristotle, to be consistent we must imitate him. Malacology is sadly in need of an irarfe.c expui— 

 g'«iori((« and I am by no means sure that it ought not to contain with these polynomial authors, the anonymous writers of Museum Colonnianum, 

 Museum Boltenianum, et id omne genus. Since, however, through the endeavors of Swainson, Gray, Morcli and Hermannseu , we now have the 

 names of Humphrey , Bolten and Link (who were binomial though defective) applied to definitely recognized genera, and since conchologists are very 

 generally agreed on their use, they may be retained : but no good argument has yet been adduced to support the use of names, derived from tliose 

 authors who wore habitually polynomial. 



