462 BULLETIN 152, UNITED STATES NATIONAL MUSEUM 



Genus CHLORODIELLA Rathbun 



Chlorodius Milne Edwards, Hist. Nat. Crust., vol. 1, 1834, p. 399; type, C. 

 niger (Forsk&l). Not Clorodius Leach in Desmarest, 1823. 



Fucicola GiSTEL, Naturg. Thierreichs, 1848, p. viii (part) ; not Fucicola Menke, 

 1844, nudibranch. 



Chlorodiella Rathbun, Proc. Biol. Soc. Washington, vol. 11, 1897, p. 157; sub- 

 stituted for Chlorodius Milne Edwards. 



Carapace depressed, hexagonal; regions partially or not at all 

 demarcated; surface smooth and almost unbroken except sometimes 

 anteriorly and on branchio-hepatic region near antero-lateral border, 

 where there may be some broad transverse wrinkles. Fronto-orbital 

 border varying from about two-thirds to more than three-fourths 

 the width of carapace. Front broad, almost straight, emarginate in 

 middle, its outer angles separated from the supra-orbital margin by 

 a groove. Antero-lateral borders cut into four lobes or teeth, ex- 

 clusive of orbital angle. Orbit with two suture lines above and one 

 below outer angle; eyes on short thick stalks. Basal antennal 

 article large, extending upwards and outw^ards into the orbital gap. 

 Merus of external maxillipeds with anterior margin almost trans- 

 verse. Chelipeds unequal, more than twice as long as carapace; 

 fingers stout, deeply hollowed at tip. Legs spinulous. The third to 

 fifth somites of the male abdomen are fused. 



Inhabits the Indo-Pacific region, the Atlantic coast of middle 

 America; also west Africa. 



Contains only one American species.^^ 



CHLORODIELLA LONGIMANA (Milne Edwards) 



Plate 186 



Chlorodius longimanus Milne Edwards, Hist. Nat. Crust., vol. 1, 1834, p. 401 



(type-locality, Porto Rico; type in Paris Mus.). 

 Chlorodiella longimanus Rathbun, Ann. Inst. Jamaica, vol. 1, 1897, p. 14. 

 Chlorodiella longimana Rathbun, Bull. U. S. Fish Comm. for 1900, vol. 20, part 2 



(1901), p. 36. 



Diagnosis. — Transverse folds on carapace. Front double-edged. 

 Chelipeds extremely long and heavy. A sinus on front edge of merus 

 of outer maxilliped. 



Description. — Surface punctate and microscopically granulate. 

 Gastric region faintly indicated. A smooth transverse ridge and a 

 deep furrow on epigastric, protogastric, hepatic and anterior branchial 

 regions. The first three lateral teeth blunt, the last two longer and 

 acute or subacute; a tubercle above the fourth tooth. Front with a 

 double edge, the upper one truncate, feebly notched at middle, the 



« The identity of " Chlorodius caribaeus" Desbonne (Desbonne and Schramm, Crust. Guadeloupe, 1867, 

 p. 31) has not been determined. 



Chlorodius imbricaius Spence Bate (Proc. Zool. Soc. London, 1864, p. 664; in Lord's Naturalist in Van- 

 couver Island and British Columbia, vol. 2, 1866, p. 270), "Esquimau Harbor, 8 fathoms," does not belong 

 to the fauna of British Columbia and was introduced along with others into Bate's report through an 

 error in locality. See S. I. Smith, Kept. Geol. Sur. Canada, 1878-1879 (1880), p. 209 B, footnote. 



