74 FASCIOLARIA. 



Fasciolarias is the comparatively large size of the species. The 

 distribution of the genus is tropical and sub-tropical, in shallow 

 waters. But few living species are known, to which may be 

 added some fossil foi'ms, commencing with the cretaceous. The 

 operculum is more claw-shaped than that of Fusus^ and is rather 

 large, filling the aperture. 



I have figured the nidimental capsules of F. tidipa, Linn., in 

 Vol. II, PI. 7, figs. 77, 81. 



* Shell not nodulous or shouldered. 



y F. TULIPA, Linn. PI. 59, figs. 1-5. 



^ Color white or liluish-ash or orange, irregularly mottled with 



orange, chestnut or chocolate ; encircled with chestnut-brown 

 narrow lines, which are sometimes engraved. Aperture and 

 columella blush or orange, with revolving lines of chestnut 

 within. Length, 4 to 8 inches. 



West Indies, Southern Atlantic Const of United States, 



from N. Carolina, southwards. 



Krebs found it in two to six feet of water, on sand and small 

 stones, where Alyee are growing, and where the sea is calm. 



The color-varieties are very numerous, including, not fre- 

 quently, one of a uniform dark mahogany, with black revolving 

 lines, and the following, which has been usually accepted as a 

 distinct species, and maj^ be retained as a variety. 



*V Var. DiSTANs, Lam. Fig. 5. 



|/ The revolving colored lines are less numerous than in the tj^pe, 



the more prominent ones, to the number of about a half-dozen, 

 being retained on the body-whorl, whilst the intermediate ones 

 are absent. The shell does not usually groAv to such a large size 

 as the t3'pical form. Inhabits the same localities. In the 

 numerous specimens before me, I have abundant evidence that 

 the variety originates from the t^pe, in the unbroken series 

 of intermediate stages of coloration. I figure a rugose form 

 which Dunker intended at one time to describe as F. Scheepviakeri, 

 but finally illustrated in his " Novitates " as a variety of F. 

 tulipa (fig. .3). 



F. canaliculata, Valenciennes, described as from Acapulco, 

 Pacific Coast of Mexico, has never been figured nor positively 



