ON THE GENUS PENNELLA, Stp.& Ltfc. ,p.408 . 



In regard to the peciiliar restriction of the genus 

 Pennella in distinction Trom closely related gen- 

 era one fir.ds great uniformity amongst authors, 

 and in the Hi story of the Crustacea .oy Milne- 

 Edwards as well as in worlcs "by other authors forms 

 are referred to thi s genus which we have not toeen 

 aole to locate except in one douotful instance, 

 viz. .Pennella sultana,Nordmann. 



But it has loeen very difficult to distinguish 

 the species from one another within the genus, and 

 In this respect we have oertainly heen moderate 

 for a long time. To the hitherto descriloed 

 species we are now ooliged to add two,whereo£ the 

 one possesses so much the greater interest toecause 

 it is the p.rasite of a warm-blooded animal,while 

 the other furnishes us a toleraoly complate life- 

 history , which throws light on the early develop- 

 ment of this hitherto unknown form. A single 

 indlvidual of this last species also gives us s orne 

 idea of the male hitherto sought in vain. 



With reference to the grouping of the species 

 we may call attention to the faet that Milne-Ed- 

 wards has grouped the species of this genus well, 



