42G 



PROF. F. J. BELL ON THE TEMNOPLEURID^. [June 1, 



considerable variation in the height of the specimens ; the actino- 

 stome does not diminish so much in size during growth as it does in 

 T. toreumaticus or T. hardwickii. 



II. MiCROCYPHUS. 



The specimens of this genus alter in appearance very greatly 

 during growth, as may be gathered from the fact that Prof. A. 

 Agassiz formed a new genus AntJiechimis (?'oseus 9.p.) for some rather 

 young examples of 31. maculatus ; and matters are, unfortunately, a 

 little complicated by the fact that the young of M. zigzag {?i?> deter- 

 mined by Prof. Alex. Agassiz) have externally a most remarkable 

 resemblance to the young of M. maculatus {Anthechinus 7-oseus). 



The information which can be given regarding these two species 

 is somewhat meagre ; the most interesting point is, perhaps, the 

 slight extent to which the actinostome of M. zigzag diminishes in 

 proportional size during growth. 



1. MiCROCYPHUS MACULATUS. 



2. M. ZIGZAG. 



III. Salmacis. 



Of all the genera of the Temnopleuridse, this is perha{)S the 

 most difficult; the determination of its species has more tlian once 

 engaged my attention, and has been more than once ])ut aside in 

 despair. Now, however, I have the advantage of having at hand 

 the preliminary set of specimens collected by the officers of II. M.S. 

 • Challenger' and named by no less an authority than Prof. Alex. 

 Agassiz. Some of these are exceediugly interesting as being very 

 young specimens. Now, too, I have at hand the three interesting 

 [6] ^ 



