THE CIRRIPEDIA. 



261 



males with hermaphrodites. Thus, Scalpellum vulgare is 

 hermaphrodite, possessing well-developed male and female 

 organs. Nevertheless, on the inner side of the occludent 

 margin of its scutum there is a fold, over which and imbed- 

 ded in the spinose chitinous border of the scutum, a minute, 

 oval, sac-like creature is commonly found, firmly attached by 



Fig. 69.— 1. AMppe lampas ; female. 2. The same in pectional view: B. Horny 

 disk of attachment : in 1. the males are visible as dark *peck? on either side of 

 the upper part o! the sac : c, ovary; h. first p^ir of cirri : k. I, n. three seg- 

 ments of the thorax without cirri : the other three segments, benrin? the three 

 pairs of terminal cirri, are very short. 3. Male A/cipp^ : a. antenuary append- 

 aees ; b. vesicula seminalis ; d, eye: d. testis: k. orifice of the sac: m. pe- 

 nis. 4. Burrow of Akippe in a portion of a Fuytix shell. 5. Cryp(or>Malu8 

 minutus (female) with tbe outer inteL'ument removfd: e. labrura : /". palpi: g, 

 outer maxillae: h. rudimentary maxillipede: c. wall of sac continued above 

 Into the rim of the ap^-rture a.h; I. m. abdominal cirri : k. apnenda^es of un- 

 known nature. 6. Male Crypt ophialus. 7. ProUoUpfis birincfa : m. month : g, h, 

 peduncle and antenna ; i. k. vesicula seminalis and penis. (After Darwin.) 



cement which covers the characteristic antennules of a Cir- 

 ripede. Within the sac is a thorax, with four pairs of rudi- 

 mentary appendages terminated by a short abdomen. There 

 is neither mouth, alimentary canal, nor prnathites, the cavity 

 of the body being principally occupied by a great seminal 



