MR. G. S. BRADY ON AN EMTOMOSTRACAN, ETC. 203 



Check List of Invertebrate Fossils of North America (^Eocene and Oligocene), 

 by T. Courad. The Smithsonian Institute. 



Synopsis of the Species of Starfish in the British Museum, by Dr. J. E. Gray, 

 F.R.S., &c. The Author, per Rev. A. M, Norman. 



Transactions of the Natural History Society of Isis in Dresden, Nos. 4-9. 



The Society. 



Annual Report and Transactions of the Plymouth Institution, and Devon 

 and Cornwall Natural History Society, Part 2, Vol. II. The Society. 



X. — Description of an Entomostracan inhabiting a C'oal-Mi-ne. 

 By G. Stewardson Brady, C.M.Z.S., &c. (Plate VI). 



The interest attaching to the little animal here described lies 

 chiefly in the peculiarity of its habitat. The members of the 

 order Copepoda, to which it belongs, are widely distributed, 

 inhabiting, in vast numbers, both fresh and salt water. They 

 occur abundantly in lakes, ponds, and ditches, where they are 

 chiefly represented by various species of the genera Cyclops, 

 Duqytomus, and Canthocamptiis ; in brackish water by Temora, 

 Tachidius, &c. ; and in the sea by a large number of families 

 and genera of free-swimming habits ; but besides these there is 

 a large group of species which are entirely parasitic, being found 

 in the branchial cavities of Ascidians and in other analogous 

 situations. But the species now under notice was found living 

 under circumstances widely diflerent from any of these. The 

 roof of a part of the workings of Cramlington Colliery is kept 

 constantly wet by the percolation of water from above, and here, 

 amongst a slimy, gelatinous vegetable growth, consisting, ap- 

 parently, of imperfectly developed Algse such as Chcctopiliora? 

 this little creature lives and multiplies. In anatomical structure 

 it does not depart very widely from the genus Cantliocamptus, 

 under which I have here placed it ; but there is great difficulty 

 in accurately ascertaining the structure of the limbs and maxil- 

 lary organs of animals so minute as this, and of which no great 



