76 TRANSACTIONS, NATURAL HISTORY SOCIETY OF GLASGOW. 



from the British seas, and apart, therefore, from its peculiar 

 eye structure, it forms a most interesting addition to our 

 Clyde Crustacean fauna. It has been recorded by Professor 

 G. 0. Sars from the coast of Norway in depths of 200-300 

 fathoms. 



There are only five species in the genus Pseudomma. 

 P. roseum, G. 0. Sars; P. affine, G. 0. Sars; and P. truncatum, 

 Smith, are all northern species; while P. Sarsii, Suhm, and 

 P. australe, G. 0. Sars, are antarctic forms. 



P. roseum closely resembles P. Sarsii, which has been dredged 

 by H.M.S. "Challenger" in the Antarctic Ocean (Lat. 65° 

 42' S. ; Long. 79° 49' E.) at the depth of 1,675 fathoms.* 



Dr. J. R. Henderson, in his paper on " The Higher Crustacea 

 of the Firth of Clyde," read before the Society in 1885, records 

 fourteen species only of Schizopoda.f Since that time the 

 number has been slowly augmented, and the twenty-six species 

 now on the list form a very large proportion of the whole 

 number of species recorded from the British seas. 



Of the Schizopoda recorded by Sars from the coast of Norway 

 about eighteen to twenty species have not yet been found in 

 our seas. They are mostly all deep-water species, but I have 

 no doubt but with further systematic investigation we may yet 

 be able to add many more of these interesting forms to the list 

 of our Crustacean fauna. 



* H.M.S. "ChaUmger" Reports, 1873-1876. Zoology, Vol. XIII., 

 " Report on the Schizopoda," p. 191. 

 t Trans. Nat. Hist. Sac. Olasg., Vol. I. (N. S.), p. 325. 



