COMPLEMENTAL MALE. 209 



rudimentary, and serves as a mere flap to protect the 

 mouth. In the three specimens carefully examined, the 

 posterior cirri had each only one ramus, whilst the anterior 

 cirri generally had two : in one specimen, one of the rami 

 in the anterior cirrus was formed of five segments, and 

 the other ramus of three segments, both rami being sup- 

 ported on a uni-articulated pedicel ; but on the opposite 

 side of the same individual, the anterior cirrus was repre- 

 sented by a mere knob. The longer ramus of the anterior 

 cirrus, in the best-developed individual, barely exceeded 

 in length the mandibles measured along the line of the 

 teeth ! In one specimen between the bases of the pos- 

 terior cirri, there were two perfectly distinct caudal appen- 

 dages ; these, like the cirri, are in a quite rudimentary con- 

 dition; one was Troths of an inch in length, and consisted 

 of three segments, the upper edges of which had short 

 spines ; the other was shorter, uni-articulated, but spinose. 

 In a second specimen, these appendages were quite 

 aborted. Close under them, on the inside or towards the 

 mouth, (that is, in the normal position,) there was a 

 rudimentary but quite distinct penis, with the apex pro- 

 jecting freely, and with the sides distinguishable from the 

 ventral surface of the thorax, for the length of -^th of an 

 inch : the corium lining this little penis made the terminal 

 orifice plainly visible. The vesiculse seminales lie in the 

 usual position, and are conspicuous ; they are slightly 

 tortuous, with their ends blunt : in the specimen so well 

 preserved in spirits, they were filled with a mass of sper- 

 matozoa, perfectly distinct ; and the whole cavity of the 

 body was lined with globular and pear-shaped testes. 

 Assuredly there was no vestige of ovarian tubes. From 

 the greater size and excellent preservation of this specimen, 

 which rendered the examination of the generative system 

 so easy, I was able to examine the contents of the stomach, 

 in which I found the delicate epithelial coat, separated as 

 usual, and containing cellular matter, on which the animal 

 had preyed, but the nature of which I was unable to 



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