10 EICHARDSON — FOUR NEW SPECIES OF ROCIXELA. rJau.21, 



R. ciibensis, sp. nov. 

 R. japonica, sp. nov. 

 R. tubei'culosa, sp. nov. 



II. 



Analytic key of all the known species of Rocinela, with the addi- 

 tion of four new species. . 



a. Eyes contiguous. 



b. Head produced into process in front . . . R. oculata Harger. 

 b' . Head not produced into process in front. 



c. Flagellum of second pair of antennae as long as peduncle. . 



R. spo7igiocola Thomson. 



d . Flagellum of second pair of antennae more than twice as 



long as peduncle R. vigilans Haswell. 



a . Eyes not contiguous. 



b. Flagellum of second pair of antennae with 14-16 joints. 

 c. Eyes close together. 



d. Head with frontal area excavated, bicarinated, front 



roundly produced with raised margin 



R. da7wioiiiensis Leach. 

 d' . Head without median excavation, not bicarinated . . . 



R. insularis Schioedte and Meinert. 

 (f . Eyes widely separated. 



d. Propodus of prehensile legs with two to four spines. 

 e. First thoracic segment with antero-lateral angles pro- 

 duced horn-like at sides of head 



R. cornuta, sp. nov. 

 /. First thoracic segment normal. 

 /. Frontal margin of head produced. 



g. Head tuberculated R. cubensis, sp. nov. 



^ . Head not tuberculated. 



h. Head with frontal excavation. 



/. Front bicarinated. . . . R. dunierilii Leach. 

 /'. Front not bicarinated . R. japonica, sp. nov. 



//. Head without frontal excavation 



R. modes fa Hansen. 

 f. Frontal margin of head not produced. 



g. Terminal segment of body linguate ; both branches 

 of the uropods crenulate on their exterior 

 margins. 



