468 Miscellaneous. 



according to the state of flexure of the arms, and which is nothing 

 but the prolongation of the general cavity. It is to this cavity that 

 Dr. Carpenter has given the name of the cceliac canal. The calca- 

 reous joints are besides enveloped by a delicate membrane, beneath 

 which are seen stellate conjunctive corpuscles. The tentacular canal 

 terminates ccecally in the arms and in the pinnules, a little beyond 

 the middle of the antepenultimate calcareous joint. Muscular fibres 

 unite the groups of tentacles to the point where they spread into 

 three branches ; a muscular ribbon also runs all along the median 

 line of the arms beneath the epithelium of the ambulacral furrow. 

 Each tentacle, moreover, has its proper muscles, situated between 

 the external epithelium and the first envelope proceeding from the 

 tentacular canal. We cannot, therefore, accept the opinion of Pro- 

 fessor Wyville Thomson, who regards the tissues of the Comatulce 

 as sarcodic. 



I could find no trace of a nervous system. 



I have cut off the arms of several of these animals, and witnessed 

 their regeneration, which takes place very rapidly. — Comptes Rendus, 

 March 17, 1873, p. 718. 



On Mammalia from the Neighhourhood of Concordia, in New Granada. 

 By Dr. J. E. Geat, F.E.S. <fec. 



Mr. Edward Gerrard, Jun., has just received a series of Mam- 

 malia from Concordia or Antioquia, which is very interesting as 

 showing that several species have a more northern distribution on 

 the western side of the subtropical part of South America north of 

 the equator. 



1. Atelesater. A fine large specimen. 



2. Cehus hiipoleucus. A large specimen, with the upper part of 

 the forearms white. 



3. Nyctipithecxis Commersonii. Like the other monkeys of a large 

 size. 



4. Nasua dorsalis, Gray, P. Z. S. 1866, t. xvii. There are four 

 specimens of this species, of diff'erent ages, but very nearly alike. 

 The younger one is the darkest, and most resembles the single one 

 figured, on which was established the species, which the present 

 specimens confirm. 



5. Galera harhata. The specimen is peculiar for having a white 

 lunar mark on the front of the back ; but this mark is not quite sym- 

 metrical, and most probably accidental. 



6. Grisonia vittata. The specimen is of very large size, larger 

 than those we usually have from Demerara. 



7. DiclelpJiys cancrivora. 



8. Er'ethizon rufescens, Gray, P. Z. S. 1865, p. 321, t. xi. Only 

 one specimen of this species before known ; and this confirms the 

 habitat (Columbia) assigned to it, and also the distinctness of the 

 species, and enables us to examine its skull. 



0. Dasyprocta nigra. Gray, Ann. <fe Mag. Nat. Hist. 1842 ; Zool. 



