76 University of California Publications. [| ZooLocx 
Salpa zonaria-cordiformis, Pall.-Quoy et Gaim. 
Holothurium zonarium Pallas, 1774, Fasl. X, p. 26, Pl. I, figs. 17, 
A, B, and C. 
Salpa polycratica Forsk., 1775, p. 116, Pl. 36, fig. F. 
Salpa zonaria Cham., 1819, p. 12, Pl. figs. 1A to G. 
Salpa cordiformis Quoy et Gaim., 1327, p. 225, Pl. 8A, figs. 3-6. 
Salpa cordiformis-zonaria Krobn, 1846, p. 112. 
Salpa cordiformis-polycratica Vogt, 1854, p. 7. 
Salpa cordiformis-zonaria Traustedt, 1884, p. 382, Pl. II, figs. 
18, 19, 20, and 21. 
Salpa cordiformis-zonaria Herdman, 1888, p. 70, Pl. VII, figs. 1-9. 
Salpa cordiformis Brooks, 1893, p. 10 (particularly); Pl. IU, 
figs. 2 and 3; Pl. IV, figs. 3, 5, 6; Pl. VIII, fig. 5. 
Salpa zonaria Apstein, 1894, p. 19; 1901, p. ITT, 10, figs. 10a, 10b. 
Fig. 20.—S. cordiformis-zonaria, solitary generation. 
(a) Solitary (budding) generation.—Fig. 20. Body unusu- 
ally firm and hard, probably more so than in any other species; 
form regular, of nearly uniform diameter throughout, though 
slightly larger at posterior end; somewhat quadrilateral, though 
this perhaps due to shrinkage, and may be characteristic of pre- 
served animals only. Long axis almost perfectly straight. Wholly 
colorless except for light lemon yellow of nucleus. Maximum 
length of zooids so far obtained in our area, 35 mm., though a 
length of 60 mm. is recorded by other observers. 
Anterior end strikingly truncate, the orifice being exactly 
terminal, the usual salpa lips scarcely suggested, and the lateral 
angles clear cut and almost exactly right angles. The somewhat 
larger posterior end produced into three ridged, sharp pointed 
processes, two of which are shorter and dorso-lateral in position, 
and the third, considerably longer, situated in the median ven- 
tral plane and directed somewhat ventrad as well as backward. 
Body muscle bands six in number, exceedingly broad, all 
quite parallel with one another in the course around the body; 
all interrupted both dorsally and ventrally, and by about the 
