

>:. ." : -"-..: : :>; .TV.-: ;" ?v.~ :. ?-..: .v;i - - : :.- . - ; --...- - 



in the Miocene deposits of Santo Domingo (Gabh, "Santo Domingo,'* 

 Trams. Am. Phil .~ p, 3lS\. but differs in its modi mate ponderous 



proportions, die greater relative elevation of the spire, die absence of 

 well-marked nodalations on the whorls of die spire, and die smaller 

 number of prominent revolving fines on die wboris of die spire. The 

 body-whorl also lacks die basal quadrangubftion seen in 7! g<aVnfc I 

 know of no fosal form thai in any way approaches die Florida species, 

 nor any species of die existing Golf fauna dot is as near to it as T. 



: .:'..: 



Shell ovate, duck, ventricose, with die greatest widdi at about die 

 middle; sphe elevated, about one-fourth die kngdt of die sneD, and 

 consisting of? nodulose volutions. 



Body-whorl strongly angulated on die shoulder dn aaga&ation 

 being at an angle of about 45 degrees to die outer maJJ and probably 

 prominently coronated widi fbttaceous or lany^^ tubercle-.; snr&oe, as 

 well as that of die rest of die shefl, profoundly grooved, widt about eight 

 sharply elevated revolving ridges below die shookler angubtion, drc sbrth 

 - ! . '- -- -:/ ' . " : ' , : -: .-.:- ~, : ;.-.- <. .-.-..-... - : 



.-. ^tace equal to two of die other interspaces ; sntanl fine somewhat 

 impressed, and bordered mferiorh/ by a bondto ridge; apertcre produced 

 posteriorij^ into a short canal, somewbat note tJhan one-balf die lengdi 

 of die shell. 



Columellar swmce coveted with a thick deposit of calhKs which 

 leaves partially exposed a broad nmbificus; cononettar phits three, of 

 which only die upper two are prominent, the basal one being 

 I 



Lengdi of imperfect specimen, lacking probabryaiun 

 five and a half inches; wkkfa. three and a half inches. 



CaJoosah atchic, in tJhe banks bdow Fort Thoonpson. 



obtained but a single adult apoaman of ds large ftnam, which 

 apparentix- exceeds all other species of dw genus in saw. Unfertunat, 



vXMdhwM prevents die abse^te detenniaa^ 



but sufficient remains to indicate tjbat it is a clearry-denned species 

 There are but few traces of die coronating tubercles See, but I dank 

 then? can be no doubt, seeing die acute angulation of die shoulder, and 

 die character of die spines in die young shell, dot the tubercles were 

 squamose, as in the East Asiatic i: ^4*fc and not of die typical blunt 

 -. in our soudiern IT *n,va*m. From die latter, apart from 

 die character just indicated, the Florida fossil differs in fc$ less tmbwate 

 form, the greater length of its spire, die smaller numhtt aind 



