DU. P. V. CARIMCNTKR ON THE SHELLS OF PANAMA. 13 



219, Chemvifzia arulpiix, M. 5? I. 



2J'>. ChpniiiH:iri (truiiiiiinfa is a true Cheinnitzia, and not a Chnj- 

 gnllifta, as su|i|><)<r(l in the \\r. Assoc, llcport, p. 331. The name 

 nii-^lends, as it is a ])ccMili.ulv hiMad species. The vertex consijits of 

 three I'ahuhiioiil whorls, oi' which the apex is visihle, pnijiHlini; a 

 little beyoml the spire. The ribs, instead of " termniixting abrnptly 

 on the periphery of the last whorl," become gradually evanescent 

 tounii the base *. ' 



221. Cliemnilzin affinia. Comp. M. .'i23, which was identified 

 from Mr. Cumins's specimen. The diagnosis needs the foUowini^ 

 corrections from the type. The "ribs terminate " not very " abruptly 

 at the periphery." Anteriorly very finely striated [i.ot " smooth "]. 

 "^ast whorl" not " ani;nlar at the periphery." Base prolonged. 



■i prol)ably the adult form of my Cheinnitzifi vnclnta, M. 531, the 

 characteristic fine, waved, spiral strife having escaped the Professor's 

 notice. The only diiierence is that the ribs evanesce more suddenly 

 in the Panama than in the Mazatlan shell, which may be due simply 

 to age. 



222. Chenmifzia cinthrattila, Yiiixt.= ChrysnUi(la clafhrafxiJa, M. 

 .513, which was identified from the Cumingian specimen. The spe- 

 cimens preser\ed as types contain, along with this species, one of 

 ChnjsaUida comminiis, one (almost certaiidy) of Chrijuiillida cffnsa, 

 M. .tIO, and one o( Dimkerin sahangnlafa, M. .537. Some parts of 

 the descri|)ti()n a])pear taken from the latter species: e. (/. the "fivi> 

 or six " spiral lines, of which there are only four in the ChnjsaHidd ; 

 and the angle on the "upper part" of the whorls, which in the 

 latter are well rounded. 



223. Chemnitzia communis, M. .507. This is the type of the 

 genus Chrysallifla : v. A!, pp. 4I(), 420. Prof. Adams's tray con- 

 tains also one si)ecimen of C/iri/sa//iihi effiti^a, M. .510; one of Vhnjs. 

 telescopium, jNI. .50S ; one of Diaikeria subaityulata, M. 537; and 

 one which may be a variety of the latter, or a distinct species. 



224. Chemnitzui y^ncilior. The " well-impressed spiral line" is 

 only seen in some of the whorls. 



225 Chemnitzin ninjor belongs to the section Bunkeria. I counted 

 eighteen (not twenty-tour) ribs. 



226. Chemnitzia maryinatn is a good species of ChrysaUida ; but 

 I could not find the " spiral, compressed ridge." 



227 Chemnitzia panamerisis, M. 518. I counted twenty -four 

 (not twenty-seven) ribs. The tray also contains one specimen of 



* As several errors are here pointed out in the diagnoses of small shells, it is 

 right to state that I'rof. Adams had luit tlie advantage of a microscope during a 

 considerahle portion of tlie work ; nor was the instrument a good one when oli- 

 tained. Moreover tlie incessant demands on his attention as Professor of Astro- 

 uomy a'ld .Matiiematies, as well as of Natural History, and his duties as State 

 Geologist of Vermont, did not leave him nuich time for original research. What 

 he accomplished during his short life is marvellous. Hail that life heen sjiared to 

 revise his works, the uccci^u^ iui uns irieudly criticiism wuuld uot ha\tt iU'uea. 



187 



