30 U.S. NATIONAL MUSEUM BULLETIN 2 78 



alcyonarians, bryozoans, and colonial ascidians. It was also taken 

 from the egg mass of a blue crab and from the gut of a sea bass 

 Centropristis. This species ranges in depth from the surface to ?3000 m 

 (McCam, 1966). 



In an aquarium it was preyed upon by the grass shrimp Palae- 

 monetes, the blenny Blennius, and the small (2 mm) snail Astyris 

 was observed severing the cephalon from a large male (12 mm). 

 When C. equilibra was offered small pieces of bivalves or bryozoans 

 it would accept them readily. It was also observed catching small 

 gammaridean amphipods such as Ampithoe and Jassa and also several 

 small polychaetes. Initially the prey was seized in gnathopod 1 and 

 then brought to the mouthparts. Gnathopod 2 was seldom used in 

 the capture of prey and even when it was used, the prey was quickly 

 passed to gnathopod 1. 



Caprella linearis (Linnaeus, 1767) 



Figures 14, 22, 51 



Cancer linearis Linnaeus, 1767, p. 1056; 1769, pp. 445-446; 1788, p. 2992; 1793, 

 p. 501.— J. Fabricius, 1793, pp. 517-518. 



Onisci Scolopendroidis Pallas, 1772, p. 80, pi. 4, fig. 15a-c. 



Squilla lobata Miiller, 1776, p. 197. 



Sqtiilla qxiadrilohata Abildgaard, 1788, pp. 21-22, pi. 56, figs 4-6. 



Gammarus quadrilobahis. — Abildgaard, 1789, p. 58, pi. 114, figs. 11-12. 



Cancer (Gammarellus) linearis.— Rerhst, 1793 ,pp. 142-144, pis. 9a, 10b. 



Cancer Linnearis. — Linnaeus, 1800, p. 761. 



Caprella linearis.— Bosc, 1801-02, p. 156; 1830, p. 126, pi. 15, fig. 5.— Latreille, 

 1802-03, pp. 324-326, pi. 57, figs. 2-5; 1803, p. 333; 1816, p. 434.— Desmarest, 

 1823, p. 364; 1825, p. 278.— Johnston, 1835, pp. 671-672, fig. 71.— Drapiez, 

 1837, p. 353.— H. Edwards, 1840, pp. 106-107.— Goodsir, 1842, p. 190, pi. 3, 

 figs. 8-9.— White, 1847, pp. 91-92; 1850, pp. 59-60; 1857, pp. 214-215.— 

 Cocks, 1849, p. 83.— Williams, 1854, pp. 301-312, pi. 17, fig. 6.— Gosse, 1855, 

 p. 131, fig. 223.— Bate, 1856, p. 60; 1857, p. 151; 1862, p. 353, pi. 55, fig. 7; 

 1878, p. 509; 1887, p. 175.— Leydig, 1860, p. 283.— van Beneden, 1861, p. 

 145.— McAndrew, 1861, p. 28.— [?] Dohrn, 1866, pp. 245-250, pi. 13b.— 

 Bate and Westwood, 1868, pp. 52-56.— Miiller, 1869, pp. 40-41.— Metzger, 

 1869-70 (1871), p. 32; 1875, p. 278.— Boeck, 1871a, pp. 273 (193)-274 

 (194).— larzynsky, 1870, p. 316.— Parfitt, 1873, p. 250.— M'Intosh, 1874, 

 p. 272.— Maitland, 1874, p. 245.— Meinert, 1877-78, pp. 168-171; 1880, 

 p. 495; 1890, p. 184.— Hoes, 1879, pp. 97-161, pi. 5, figs. 1-8, 11-13, pi. 6, 

 fig. 2, pi. 7, figs. 1-3, 11-14; 1883-84, pp. 532, 533; 1889, p. 231.— Delage, 

 1881, p. 153.— Mayer, 1882, pp. 58-62, figs. 17-19, pi. 4, fig. 32; 1890, pp. 

 63-65; 1903, pp. 109-113, pi. 4, figs. 27-35, pi. 8, figs. 19-21.— Pelsenner, 

 1883, p. CXXXI; 1886, p. 218.— Schneider, 1883, p. 30; 1891, pp. Ill, 122; 

 1924 (1926), pp. 59-60.— Blanc, 1884, pp. 88-91, pi. 5, figs. 122-129.— 

 Koehler, 1884 (1885), pp. 98-99, 117; 1885, pp. 27, 61.— Wagner, 1885, 

 p. 169.— Fowler, 1886, p. 218.— de Guerne, 1886, p. XLIIL— Norman, 1886, 

 p. 26; 1902, p. 483; 1905a, p. 26; 1905b, p. 85; 1907, p. 370; 1908 (1909), 

 p. 463.— G. Sars, 1886, pp. 69, 89; 1895, pp. 657-658, pi. 236.— [?] Thomson 

 and Chilton, 1886, p. 142.— Bonnier, 1887, pp. 354-356.— ChevTeux, 1887, 

 p. 335; 1898, p. 484.— Robertson, 1886-87 (1888), pp. 71-72.— Scott, 1887 



