ANNULOSA. 



49 



Fig. 43. Ichthyophthira. A, Female of Tracheliastes polycolpus, enlarged about eight 

 times (after Nordmann) : m. Second pair of maxillipedes, united at their extremities to form 

 an adhesive disc ; a, Prehensile antennae ; o, Ovisacs. B, Female of Diocus gobinus, enlarged 

 four times : o, Ovisacs. c, Pigmy male of the preceding, enlarged thirty-eight times. (After 

 Steenstrup and Liitken.) 



ORDER III. CIRRIPEDIA. 

 Sub-ord. 1. Thoracica. 



Fam. a. Balanidae (Acorn-shells). Balanus, Pyryinna, 



Coronula, Chthamalus. 

 Fam. 1. Verrucidae. Verruca. 

 Fam. c. Lepadidae (Barnacles). Lepas (fig. 44), Puicil- 



asftna, Pollicipes, Scalpellum. 



Sub-ord. 2. Abdominalia. Cryptophialus. 



Sub-ord. 3. Apoda. Proteolepas. 



D 



