66 



PROCEEDINGS OF THE NATIONAL MUSEUM 



K. praelongacicula) . The diagnostic characteristics of the new species 

 are the setal formula for the exopodite of each of the four pairs of 

 thoracic legs (the total number being 5, 7, 7, 7 for thoracic legs 1-4 

 respectively) , the presence of distinct denticulations on the endopodite 

 of each of the four legs, the length of the aciculum and its peculiarly 

 bifid tip. 



Table 2. — Armature of thoracic legs I-IV of the female of Kr0yeria praelonga- 



cicula, new species 



Remarks. — The name of this species derives from the Latin "prae- 

 longus," meaning very long, and "acicula," meaning small needle, 

 both terms descriptive of the extra length of the two needle-like 

 projections from the posterior surface of the cephalo thorax. 



Family Anthosomatidae 



Anthosoma crassum (Abildgaard, 1794) 



Figures Aa-h, 5a-h, 6a-j 



Caligus crassus Abildgaard, 1794, p. 46, pi. 5, figs. 1-3. — Lamarck, 1818, p. 210. 



Anthosoma smithii Leach, 1814, pi. 181; 1816, p. 406, pi. 20, figs. 1-6. — Latreille, 

 1817, p. 198.— Leach, 1819, p. 533.— LatreUle, 1829, p. 198.— Burmeister, 

 1835, p. 328.— Kr0yer, 1838, p. 295, pi. 2, fig. 2.— Milne-Edwards, 1840, p. 

 483, pi. 39, fig. 5.— Guerin-Meneville, 1843, pi. 35, fig. 9.— White, 1857, pp. 124, 

 323.— Van Beneden, 1870, p. 9.— Richiardi, 1880, p. 5.— Valle, 1880, p. 62. 



Caligus imbricatus Risso, 1816, p. 162, pi. 3, fig. 13. — Lamarck, 1818, p. 211. 



Caligus smithii. — Lamarck, 1818, p. 210. 



Anthosoma crassum.— Latreille, 1825, pi. 335, figs. 11-16.— Gould, 1841, p. 340.— 

 Steenstrup and Liitken, 1861, p. 397, pi. 12, fig. 24.— Stossich, 1880, p. 259.— 

 Rathbun, R., 1884, p. 490.— Carus, 1885, p. 364.— Thomson, 1889, p. 365, 

 pi. 27, fig. 3.— Brian, 1898, p. 5.— Bassett-Smith, 1899, p. 468.— Scott, T., 

 1905, p. 112, pi. 5, figs. 15-16.— Rathbun, M. J., 1905, p. 97.— Wilson, 1905b, 

 p. 555.— Brian, 1906, p. 62, pi. 3, fig. 1.— Fowler, 1912, p. 477.— Scott and 

 Scott, 1913, p. 108, pi. 23, figs. 5-6.— Wilson, 1922, p. 23, pi. 1, figs. 1-8; 1932, 



