122 Addis on E. Verrill, 



distribution. Coutiere states that no species of the biunguiculatus- 

 group occurs in American waters. They are Indo-Pacific species. 

 The original figures of Dana are copied on my plate 25, figures 

 2, a d. 



The species from the Arafura Sea, identified by Bate as this 

 species, seems to be very distinct. He states that the palm of the 

 large chela is scarcely three times as long as the dactyl. It differs 

 also, in several other respects ; the large chela is longer and more 

 ovate, being swollen proximally ; its carpal edge is strongly den- 

 tate ; its carpus is angular, very short and wide ; the smaller chela 

 is shorter and stouter ; its carpus is longer ; the antennular spine 

 is short. 



Jousseaumea Coutiere. 



Bulletin Mus. Hist. Nat., Paris, vol. ii, p. 381, 1896, Ann. d. Sci. Nat. 

 Zool., vol. ix, 1899, pp. 70, 129, 141, 179, 181, 325, figs. 19-23, 134, 215, 216, 

 217. 



The carapace, which is rather depressed, has a dorsal carina; 

 rostrum triangular, flattened ; orbital spines small ; eyes concealed, 

 or nearly so, by ocular hoods which blend with the rostrum or 

 frontal lobe. Chelipeds very unequal, closely folded beneath the 

 body when at rest ; larger one usually with an angular and grooved 

 propodus and cup-shaped or angular carpal segment. Larger 

 chela in typical species has the cutting edges of the fingers ser- 

 rulate, shutting together closely ; palm usually angular and carinate, 

 its inferior surface deeply grooved to fit on the merus when folded ; 

 merus angular, elongated. The following species has the palm 

 smooth. 



Carpus of second pair of legs 5-jointed ; first article longest. 

 Third and fourth legs have simple dactyls ; fifth legs have 10 to 

 12 oblique rows of hairs, as a brush, on the propodus. Mandible 

 has a 2-jointed palpus ; its cutting process is much reduced. 



Uropods not movable. Telson much narrowed distally ; tip 

 narrow, usually with only a single pair of plumose hairs between 

 the four spines at the angles. No anal tubercles. Branchial 

 formula as in Alpheus. 



Jousseaumea ortmanni (Rankin) Coutiere. 



Athanas ortmanni Rankin, Ann. N. Y. Acad. Sci., xi, p. 251, pi. xxx, 

 fig. 7, 1898. Verrill, Trans. Conn. Acad. Art. Sci., x, pt. 2, p. 579, 

 1900 (Bermuda). 



