Vou. 2] Ritter-—The Pelagic Tunicata. 79 
Salpa cylindrica Cuvier. 
Salpa cylindrica Cuvier, 1817, p. 22, figs. 8 and 9. (Solitary 
generation. ) 
Salpa cylindrica Sav. 1816, p. 124, Pl. XXIV, figs. 2,, 2., 23. 
(Tasis cylindrica in description of figures.) 
Salpa cylindrica Traustedt, 1884, p. 377, Pl. II, figs. 35, 36, 37. 
Salpa cylindrica Herdman, 1888, p. 72, Pl. VII, fig. 10. 
Salpa cylindrica Brooks, 1893, Pl. ITI, figs. 5, 6, 7; P1.VIII, fig. 2. 
Salpa cylindrica Apstein, 1894, p. 16. 
Fig. 22.—S. cylindrica, solitary generation. 
(a) Solitary (budding) generation. Wig. 22. Body nearly 
uniform in diameter from end to end, the anterior end slightly 
larger; long axis quite straight; both orifices terminal. Test for 
the most part thin and soft, though in some zooids a pair of 
rather prominent flanges with finely serrated edges situated 
dorso-laterally at the posterior end. Largest zooid seen, 23 mm. 
long. Lips of anterior orifice of equal size. 
Body muscle bands nine, all interrupted ventrally and unin- 
terrupted dorsally, first four confluent dorsally. All the bands 
rather broad and heavy. Two narrower bands in dorsal anterior 
hip and two in ventral; a segment of a cireular band behind the 
angle of the anterior orifice, and a pair of short, longitudinal- 
oblique bands in the dorsal lip. Several delicate bands in each 
lip of the posterior orifice, the dorsal and ventral groups coming 
together on each side in an acute angle. Endostyle nearly 
straight, extending the entire leneth of the body; rather slender. 
Gill likewise unusually long and slender. Hypophysis long, 
elliptical, situated at the immediate anterior end of the gill. 
Ganglion with the specially conspicuous eye spot situated a little 
nearer the hypophysis than the level of the first body muscle 
band. Nucleus small, spherical, situated a little short of the 
