26 U.S. NATIONAL MUSEUM BULLETIN 2 78 



99.— Scott, 1906, p. 175.— Sinel, 1906 (1907), p. 222.— Tichy, 1911, p. 1134.— 

 Thomson, 1913, p. 245.— LaFollette, 1914, pp. 224-225, pi 5.— Briggs, 

 1914 (1915), pp. 79-80.— Kunkel, 1918, pp. 180-181.— Thomson and Ander- 

 ton, 1921, p. 113.— Galdiano, 1924, p. 392.— Chevreux and Fage, 1925, 

 pp. 455-456, fig. 433. — Schellenberg, 1926, p. 470. — Johnson and Snook, 



1927, pp. 280-281, fig. 235.— Stephensen, 1927a, p. 150; 1927c, p. 355; 



1928, p. 386, fig. 92 (13); 1929a, pp. 180-181, figs. 43-336; 1929b, p. 34; 



1942, pp. 439, 502, 503.— Fischetti, 1932, pp. 1-28, figs. 1-5.— Oldevig, 

 1933, p. 269, fig. 3.— MacGinitie, 1935, p. 701.— Pirlot, 1939, p. 78.— Fioren- 

 cis, 1940, pp. 13-14, figs. 3-4, pi. 1, figs. 3, 4, 7.— Milne, 1940, p. 72.— 

 Oliveira, 1940, p. 139.— Bertrand, 1941, pp. 12, 13, 14, 15, 16.— McDougall, 



1943, pp. 363, 370.— Hewatt, 1946, pp. 196, 199, 201, 204.— Ruffo, 1946, 

 p. 53.— Utinomi, 1947, p. 72.— Ellis, 1950, p. 13.— Reid, 1951, pp. 283, 

 289.— Guiler, 1952, p. 31; 1954, p. 532.— Tuzet and Sanchez, 1952, pp. 26-36, 

 fig. 1-1&2, fig. 2, fig. 3.— Duke Univ. Mar. Lab., 1953, p. 22.— Belleudy, 

 1958, pp. 355-356.— Costa, 1960a, pp. 99, 100.— Luther and Fiedler, 1961, 

 p. 158, pi. 24.— Peyrot and Trilles, 1964, pp. 1-28, figs. 1-19. 



Caprella ultima Bate, 1862, pp. 364-365, pi. 57, fig. 9. 



Caprella monacantha Heller, 1866, pp. 54-55, pi. 4, figs. 17-19. — Stalio, 1877, 



pp. 1125-1126.— Stossich, 1881, p. 230. 

 Caprella obtusa Heller, 1886, p. 54, pi. 4, fig. 16.— Stalio, 1877, p. 1390.— Stossich, 



1881, p. 230. 



Caprella megacephala A. Edwards, 1868, pp. 89-91, pi. 20, fig. 12. 



Caprella aeguilibra. — Bate, 1878, p. 510. 



Caprella caudata Thomson 1878 (1879), p. 246, pi. 10, fig. D-5.— Mayer, 1882, 



pp. 71-72; 1890, p. 76. 

 Caprella obesa [not van Beneden] Haswell, 1880, pp. 348-349, pi. 24, fig. 1; 



1882, p. 314. 



Caprella AEquilihra. — Chevreux, 1888, p. 351. 



Caprella linearis [not Linnaeus]. — Barrois, 1888, pp. 56-57, 77. — Chevreux, 1899, 



p. 484 [in part]. — Chevreux and Fage, 1925, pp. 456-457, fig. 434 [in part]. — 



Pearse, 1936, p. 193.— Wells, 1961, p. 247. 

 Caprella mendax Mayer, 1903, p. 114, pi. 5, figs. 9-11, pi. 8, fig. 22. 



Diagnosis. — Basis of gnathopod 2 less than one-half length of 

 pereonite 2, propodus without small proximal accessory tooth; pereo- 

 nite 2 usually with spine between insertions of gnathopods 2 ; pereo- 

 nites 1-2 elongated in large males. 



Description. — Body smooth except for spine between insertions of 

 gnathopod 2, caphalon flattened anteriorly. Length of largest male 

 22 mm, largest female 12 mm, smallest ovigerous female 6.4 mm. 



Large males with articles 2-3 of peduncle of antenna 1 slightly 

 shorter than antenna 2, article 3 subequal in length to article 2, article 

 1 less than one-half length of article 2, articles of peduncle expanded. 

 In females and small males peduncle of antenna 1 sometimes shorter 

 than antenna 2. 



Mouthparts typical of genus, lacinia mobilis of right mandible 

 5-toothed. 



Propodus of gnathopod 1 with 2 proximal grasping spines, grasping 

 margin of dactylus and propodus serrate. Basis of gnathopod 2 short 



