1894. PROCEEDINGS OF TTTE NATIONAL MUSEUM. 67 



When the chelipeds are folded close to the carapace, one carpal tooth 

 is just in front of the anterolateral angle, the other just behind it. 

 Propodus deep, especially toward the hngers, where the upper margin 

 is produced much above the dactyl. Fiugers short, irregularly and 

 feebly toothed along tl.ieir prehensile edges which are in contact, the 

 tips crossing. Ambulatory legs unarmed, somewhat flattened; meral 

 joiuts rectangular; propodal joints tapering towards thedactyli which 

 are stout, and hairy beneath, with curved horny tips. 



Measurements. — Length of cara])ace, 15 mm.; Avidth at anterolateral 

 angles, 14.3; posterior Avidth, 8; width at orbits, 5.5; length of rostrum, 

 4.8; length of cheliped, 14; lower margin of propodus, 7 ; greatest depth 

 of propodus, 3.7; length of first and second ambulatory legs, 15; third, 

 13.13; fourth, 12.5. 



Loeality. — Port Lloyd, Bonin Islands; froju the anal end of the in- 

 testinal canal oi EehinotlirLv calamaria; one adult female (13889), 



This species with its smooth broad carapace and short legs is adapted 

 for commensalism, and resembles superficially certain of the Pinno- 

 theridai of similar habit. 



EPIALTUS ]?ITUBERCULATUy, Milne-Edwards. 



Einaltus hituhercidatus, Milne-Edwauds, Hist. Nat. Cnust., i, p. 345, pi. xv, fig. 



11, 1834. — A. Milne- Edwakds, op. cit., p. 139, pi. xxvii, Jigs. 1, 2, and 3, 



1878, and synonymy. 

 Epialtus dilatattis, A. Milne-Edwakds, o2>. vit., p. 140, \\\. xxvii, lig. 4. 



Eepreseuted in the collection by 10 specimens from 9 localities. A 

 larger series would probably show that E. sulci rostr is and E. lon<jirostris 

 Stimpson and E. mini in us Lockington are variations of the same species. 



Sabanilla, United States of Colombia; U. S. Fish Commission; 1 

 male (18131) of the form shown by A. Milne- Edwards, op. cit., pi. xxvii 

 fig. 3. 



Pernambuco ( ?), Brazil; liichard Ktithbuu, llartt Explorations, 

 1875-''77; 1 nuile, 1 female, also of the hrasHiensis fonn, and the male 

 with the heavy chelipeds fignred by Dana. 



Bird Key, Florida; U. S. Fish Commission schooner G ranijrus, Aimlj 

 8, 1889; one female with eggs (15204) of the (lilatatus form, the anterior 

 lateral lobes being more rounded than in A. Milne-Edwards's figure, 

 and the rostrum narrower at base and less tapering. 



Dry Tortugas, Florida; Dr. Edward Palmer; one immature female 

 (18132) of the dilatatns form, with lobes like the last. 



Florida (?); one small male, (144G5) with lobes intermediate between 

 typical hituhcrculatus and dilatatus. 



West coast of Florida; Henderson and Simpson ; one immature female 

 (18133), with elongate, emarginate rostrum and rather prominent lateral 

 lobes, the anterior rounded, with its anterior margin sloping backward 

 and outward, the posterior lobe with a prominent tubercle on its ante- 

 rior marffin. 



