43 1 Dominican Sections— Maury 15 



portant guide in, correlation. For example he mentions finding 

 this genus in the rocks of the Monte Cristi range,* and again on 

 the peninsula of Samana.f 



At Santa Barbara he remarks J "that the omnipresent Orbi- 

 toides fortunately appears in some places and thus saves us from 

 the uncertainty that might hang around the age of so exceptional 

 a group of rocks." 



Now our party, in the area explored by us, made a special 

 hunt for Gabb's "Orbitoides" but found nothing that looked to 

 us like that genus and on asking Dr. Cushman, he writes posi- 

 tively there are no Orbitoides in our collection ; that in this 

 country as elsewhere the genus is limited to the Cretaceous and 

 Lcpidocyclina, known as Orbitoides also in most American 

 papers, seems to be limited to Lower Oligocene and Upper Eocene. 

 Neither genus is in our collection. 



We hope some day to collect from the Monte Cristi range 

 and the Samana rocks in order to find Gabb's "Orbitoides" 

 which was doubtless a genus resembling the true Orbitoides, per- 

 haps Lepidocyciina. The object would be to determine whether 

 these formations are not an older series than the blue clays. 

 This seems extremely probable. 



Crustacea of Bluff 3. — We found quite a number of frag- 

 mentary remains of various Crustacea, especially crabs' and 

 Hermit crabs' claws. These were submitted to Miss Rathbun 

 who very kindly identified them for me as follows: — Crangoni- 

 d&, f Eryonidce, Pagurus, {■=^Eupagurus') , Calappa flammea 

 ( Herbs t), Cycloes bairdii, ? Orithyia, Persephona, Portunus near 

 spi?iicarpus Stimpson, Portunus sp., Callinectes 2 species, Pano- 

 peus, Xanthidce or possibly Goneplacidce 3 species, Mesorhcea new 

 species. 



The Caliianassa, Miss Rathbun notes, is very like and may 

 be identical with a species collected by Dr. Vaughau in the Oligo- 



*Trans. Amer. Phil. Soc, vol. 15, p. 167, 1873. 

 tldem., p. 174. 

 jldem., p. 177. 



