. IlKASSIC CVCADS KKOM \\V()MlN(i. 181 



are even approximately coiiiph'tc'. The rest arc f'rajiincnts of all f>izes, l)ut 

 many of them very small, llic least \v('i<!;hiii^ no more than 5 or (3 ^I'litinnes. 

 Many of the latter, however, show the iiilernal strudurc \(My clearlx', and 

 when the time arrives for inakin<i a stndy of them fr<im micidscdpic 

 preparations these will yield excellent resnlts. 



In view of these last-mentioned considerations, and also in the hope 

 of finding; as many pieces complementary to t he orio;inally described tyjjes 

 as possible, I thought it worth while to make a somewhat careful study 

 of all this material, and I therefore devoted to it a consideialdc part of my 

 time from September '2'A to December 31, I'.tOl. The original types were 

 laid out in a consjiicuous position and ai'raiigcd b\- s])('cics foi' coyiparison, 

 and the later collections were then similarly exposed and first arranged by 

 numbers. Before any satisfactory results could l)e reacla^l it was found 

 necessarv, as in the case of the original collection, to clean the specimens 

 with hydrochloi'ic acid and icniovethe incrustation of lime that obscured 

 the structure of the majoi'ity of them. 'Hiis was don(> simultaneously 

 with their study. .\t first it seemed tliat only a very few could be identi- 

 fied wnth described species on account of theii' fragmentary character, 

 but prolonged and mimite in.spection and comparison with the ty])es 

 gradually revealed chai-acters that could not otherwise be detected, and 

 finally eiuibled me to ventui'e a (provisional reference in the case of a large 

 number to the species described in the first paper. The (juestion whether 

 the new material contains any additional species beyond the twenty species 

 previously described can not l)e definitely settled, but I incline to think 

 that some of the fi'agments l)elong to species different from those of the 

 first collection. This, however, is not certain from the scanty material, 

 and I have therefore referred such with doubt lo tlie species that they 

 most closely resemble. It does not seem that any of the complete trunks 

 or large characteristic fragments l^elong to new species, although some of 

 them possess characters not seen in the original types. This is notably 

 the case with those that I am ol)liged to I'efer to species foimded on only 

 one or two specimens, but in such cases this was to be expected. 



I shall take up the species in the same ordei- in which 1 hey were treated 

 in the first paper and make such additional notes on each as the study of 

 the later material calls for. In view of the probal )ilit y t hal t he specimens 

 will be one day taken up and sul)jected to microscopic study fi'oni the 



