SHRIMPS OF THE GENUS BETAEUS — HART 459 



males, 1 male. — Hecate Strait, Queen Charlotte Islands, 4 miles northeast Rose 

 Point, 10 fathoms, June 24, 1956, T. H. Butler, 1 female. 



Notes. — There are a number of variations to be seen in this species. 

 The inner ridge of the merus of the chelipeds may be almost smooth, 

 or there may be a few tubercles, or there may be a row of uniform 

 beadlike knobs. The dentition of the chelae varies considerably 

 from flat intermeshed teeth, with no gape, to others with a foramen 

 and/or a large square tooth on the fixed finger, but with the tips of 

 the fingers always crossed (figs. 70, 71). Most have similar subequal 

 chelae. To judge from specimens kept in the laboratory, regenerated 

 chelae may be without teeth and a nmnber of moults may be required 

 to regain normal size. 



Ovigerous females have been taken February-June in California 

 and May-August in British Columbia. The ovaries and freslily 

 laid eggs are a pale olive-green, becoming lighter and more trans- 

 parent with development. 



Literature Cited 



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