MODIFICATION OF THE EYE PEDUNCLES IN CYMONOWUS. 453 



Sub-family Cyclodorippinas, including two tribes, Cymo- 

 noma3 (genera Cymopolus and Cymonomus) ; Cyclodo- 

 rippa3 (genera Corycodus, Clythocerus, Cyclodorippa, 

 and Cymonomops). 



Tribe Cymonoinfe. 



Cliaracters (taken from Edwards and Bouvier). — Cara- 

 pace quadrate, rugose ; rostrum somewliat narrow, triangular, 

 with pointed termination. Afferent orifices very much 

 reduced or rudimentary. Efferent orifices more or less 

 separate, and situated far behind the frontal margin. Exo- 

 podite of the first maxillipedes more developed than their 

 external lacinia; that of the second maxillipedes quite normal. 

 An exopodial flagellum and a reduced or rudimentary epipo- 

 dite present on the third maxillipedes. Probably always 

 three pairs of swimmerets in the female. 



Genus Cymonomus, A. M.-Edw., 1830. 



Characters (as given by Edwards and. Bouvier). — Efferent 

 orifices very far separate from one another, and situate at the 

 base of the antennae. External Licinia of the first maxilli- 

 pedes much shorter than the base of the exopodite. Second 

 maxillipedes with a rudimentary epipodite, but without any 

 branchiae. Third maxillipedes with reduced epipodite, dilated 

 and articulated at its base, with the mesopodite standing- 

 forward and carrying the carpus on its internal face. A 

 single pleurobranch : three pairs of swimmerets in the female. 

 Blind. The antenna? cannot conceal themselves completely 

 beneath the rostrum (in Cymopolus they can). 



Species 1. — C. quadratus, A. Milne-Edwards. 'Bull. Mus. 

 Comp. Zool.,' vol. viii, No. 1, p. 26 (1880). 



The characters which distinguish this species from C. 

 granulatus are stated by M. M. -Edwards and Bouvier as 

 follows : 



1. All the parts of the body are less granular and much 



