40 U.S. NATIONAL MUSEUM BULLETIN 2 78 



Arbacia and on hydroids which were attached to the carapace of the 

 spider crab Libiiiia. 



Caprella sanguinca Gould, 1841 



Caprella sanguinea Gould, 1841, pp. 335-336. — de Kay, 1844, p. 41. — Stimpson, 

 1854 (1853), p. 44.— Bate, 1862, p. 360.— Mayer, 1882, p. 67; 1890, p. 73.— 

 Whiteaves, 1901, p. 219. 



Remarks. — This species from Massachusetts was described by 

 Gould as: 



... an inch in length, entirely crimson except its black eyes. The head is blunt, 

 the lower antennae cUiated and extending to the second segment, and the upper 

 ones to the third segment; first two segments nearly as long as the three next, 

 and about one third of the whole length; on the middle of the first is a spine; 

 two last segments short and heart-shaped. Hands having a long curved finger; 

 an imperfect thumb on the second pair of legs; a tubercule at the base of the 

 ovate carpus, and a small spine at the middle. This might be called C. sanguinea, 

 from its color, which it retains in spirits. 



Like Stimpsou's C. lonyimanus, this species is unidentifiable and it 

 might also belong to C. septentrionalis. 



Caprella scaura Temple ton, 1836 



Figures 17, 18, 55 



Caprella scaura Templeton, 1836, pp. 191-192, pi. 20 fig. 6.— H. Edwards, 1840, 



p. 107.— Bate, 1862, p. 355, pi. 56, fig. 4.— Mayer, 1882, p. 65; 1890, pp. 



70-73, pi. 4, figs. 40-51, pi. 6, fig. 41, pi. 7, figs. 2, 35-36 [in part]; 1903, 



pp. 117-120, pi. 5, figs. 13-18, pi. 10, fig. 11 [in part].— Walker, 1916, p. 



346.— Barnard, 1925, pp. 371-372.— Hale, 1927, p. 315; 1929, p. 234, fig. 



229.— Arimoto, 1931, pp. 16-18, pi. 3, figs. 1-6.— Hiro, 1937, pp. 314-315, 



fig. 3, pi. 22, figs. 11-12.— Day and Morgan, 1956, p. 303. 

 Caprella nodosa Templeton, 1836, pp. 192-194, pi. 21, fig. 7.— H. Edwards, 1840, 



p. 108.— Bate, 1862, p. 357, pi. 56, fig. 7. 

 Caprella cornuta Dana, 1853, pp. 816-817; 1855, pi. 54, fig. 5.— Bate, 1862, p. 



356, pi. 56, fig. 5.— Mayer, 1882, p. 68.— Chilton, 1921, pp. 90-91, fig. 4.— 



Oliveira, 1940, p. 139. 

 Caprella cornuta f. ohtusirostris Dana, 1853, p. 817; 1855, pi. 54, fig. 6. 

 Caprella attenuata Dana, 1853, pp. 817-819; 1855, pi. 55, fig. 1.— Bate, 1862, 



p. 364, pi. 57, fig. 7.— Mayer, 1882, pp. 67-68, figs. 24-25; 1890, p. 73.— 



Haswell, 1885, p. 1000. 

 Caprella attenuata f. subtenuis Dana, 1853, pp. 818-819; 1855, pi. 55, fig. Ic. 

 Caprella scaura f. typica Mayer, 1890, p. 71, pi. 4 figs. 48-49; 1903, p. 118.— 



Miyadi and Masui, 1942, p. 10.— Utinomi, 1947, p. 77. 

 Caprella scaura f. diceros Mayer, 1890, p. 71; 1903, p. 118.— Miyadi and Masui, 



1942, p. 10.— Utinomi, 1943a, p. 279; 1943b, p. 285, fig. 5; 1947, p. 77. 

 Caprella scaura f. cornuta Mayer, 1890, pp. 71-72, pi. 4, figs. 50-51; 1903, pi. 118. 

 Caprella scaura f. undetermined Mayer, 1903, p. 120. 

 Caprella scaura f. hamata Utinomi, 1947, p. 77, fig. 7. 



Diagnosis. — Cephalon with anteriorly directed spine, pereonites 

 1-2 elongate in males, basis of gnathopod 2 approximately length 

 of pereonite 2. 



