142 Addis on E. Verrill, 



Leander Desmarest. 



Lcander Desmarest, Ann. Soc. Ent. France, vol. vii, pp. 87, 91, 1849. 



Stimpson, op. cit., 1860, p. 40. Ortmann, op. cit., vol. v, p. 513, 1890. 



Stebbing, op. cit., 1893, p. 246; op. cit., 1914, p. 286. 

 Palamon Bate, op. cit, 1888, p. 781. M. J. Rathbun, op. cit, 1901, pp. 



123, 125. 



The carapace is usually not much thickened ; it has no hepatic 

 spine, but has antennal and branchiostegal spines. Mandibular 

 palpus either 2-jointed or 3~jointed. The legs of the second pair 

 are not unusually elongated. Telson subacute, with apical spines. 



Mostly marine and of rather small sizes, as compared with the 

 species of Palcemon. 



Leander affinis (H. Milne-Edwards). Transparent Shrimp. 

 Palemon affinis Milne-Edwards, Hist. Nat. Crust., ii, p. 391, 1837. 

 Palcemon affinis Dana, Crust. U. S. Expl. Exped., p. 584, 1852; Atlas, 



pi. xxxviii, figs. 5-5g, 1855. Bate, Challender Reports, Zool., xxiv, p. 



782, pi. cxxviii, fig. 5, 1888. Stone in Heilprin, The Bermuda Is., p. 



151, 1889 (Bermuda). Rathbun, M. J., Brachyura and Macrura of 



Porto Rico, p. 125, 1901. 



Leander affinis Ortmann, Zool. Jahrb., vol. v, p. 521, 1890. Stebbing, 

 Ann. S. African Mus., vol. iv, p. 386, 1910; Trans. Royal Soc. Edin- 

 burgh, vol. 1, part 2, No. 9, p. 287, 1914. 



PLATE XLIII, FIGURES 3, 30, 3^. PLATE XLVII, FIGURE 7. (Both after 

 Bate.) PLATE XLVIII, FIGURES 4-4d. By A. E. V. 



The rostrum is rather long, acute, usually with 8 to 10 teeth 

 above (sometimes 7), 2 or 3 of them are on the carapace; and 

 with 3 or 4 below. From the rostrum a dorsal carina extends 

 back to the middle of the carapace. Antennal scale is usually 

 broad ; its spine shorter than the scale. 



The following description is from Bermuda examples : The 

 antennular scale is large, flat, and reaches the second segment of 

 the peduncle; it has two sharp spines on its edge. The antenna 

 has two small basal spines and a large scale, longer than the 

 antennular peduncle and nearly as long as the rostrum; its spine 

 is not quite so long as the lamellar part. The mandibular palpus 

 is 3-jointed. 



The rostrum is elongated, curved upward distally; acute at tip, 

 which appears bifid ; its upper edge has ten teeth, of which three 

 are behind the eye-socket and the last is close to the tip ; about four 



