Pacific Salpidae — YoUNT 
305 
Fig. 17. Weelia cylindrica. a, Solitary form, left side; b,c,d, diagrams of muscle variation in the solitary form; 
in b and d, M IV is represented as being drawn out on one side (c after Sewell, 1926); e, gut of solitary form, 
right side; /, aggregate form, dorsal aspect. 
1913: 243; Oka, 1915: 31; Ihle, 1935: 527- 
529; Tokioka, 1937: 223; Thompson, 1948: 
161 . 
lasts cylindrica Savigny, 1816: 235. 
Salpa coerulescens Chamisso, 1819: 22. 
Salpa elongata Blainville, 1827: 113. 
Salpa garnotti [.^] Lesson, 1830: 271. 
Salpa truncata [.^] Quoy and Gaimard, 1834: 
588. 
Salpa coerulea Quoy and Gaimard, 1834: 589. 
Salpa {Salpa) cylindrica Metcalf, 1918: 93; 
Sewell, 1926: 77; Stiasny, 1926: 429. 
SOLITARY form: Over 10 specimens exam- 
ined with a length range of 14-38 mm. (Fig. 
