544 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. XXIII. 



spines on the transverse median line similar in size, shape, and direc- 

 tion to those of the dorsal line. 



The pleon consists of a sing-le elongated segment Avith sub-parallel 

 sides ending in a ])lunt apex. On each side of the pleon are two 

 widely separated angular projections. 



Ilah'dat. — Key West, Florida, among algae below low 

 tide. 



%>t>.— Cat. No. 15786, U.S.N.M. 



45. CLEANTIS Dana, 

 no. CLEANTIS PLANICAUDA Benedict. 



Cleantisplamcauda Benedict, in Richardson, Proc. U. 8. Nat. Mus., 

 XXI, 1899, p. 851, footnote. 



IlaVdat. — Pensacola, Florida. 



46. EDOTEA Guerin-Meneville. 



ANALYTICAL KEY TO THE SPECIES OF EDOTEA. 



«. Anterior angles of head produced into knob-like projections. Lat- 

 eral angles of thoracic segments produced into knob-like jsro- 

 jections. Four tubercles situated on the dorsal surface of the 



head 111. Edotea acuta Richardson. 



a'. Anterior angles of head not produced into knob-like projections. 

 Lateral angles of thoracic segments not produced into knob-like 

 projections. Two tubercles situated on dorsal surface of head. 

 Lateral margins of thorax nearly even. Anterior angles of head not salient. 

 Lateral margins of terminal segment scarcely indented. 



112. Edotea triJoha (Say). 



Lateral margins of thorax angnlated and salient. 



Anterior angles of head salient. Lateral margins 



. of terminal segment indented, abdomen more 



elongated 113. Edutea montosa {Stim-pson). 



Fig. 22.— CLE- 

 ANTIS PLANI- 

 CAUDA. 



III. EDOTEA ACUTA Richardson. 



Edotea acuta Richardson, Am. Nat., XXXIV, 1900, 

 p. 228. 



Head with its antero-lateral angles produced 

 in knob-like projections. Four tubercles situ- 

 ated on surface of head, two on the anterior 

 part, and two on the posterior part. First 

 pair of antenn;e not reaching beyond the lateral 

 projections. Second pair twice as long as 

 lateral projections, and carrying a rudimentary 

 flagellum. 



Thoracic segments subequal. Sidcfc of all the 

 segments produced into knob-like projections. 



Terminal abdominal segment with a transverse depression or groove 

 on either side of which the lateral margin is indented. Apex of seg- 

 ment produced as in Edotea montosa. 



Fig. 23. — Edotea acuta. 



