CORELLA. 25 



running forward in contact with the lower margin of 

 the stomach, it passes upwards attached to the left 

 side of the intestine, and opens into the cloaca 

 close by the anal tube. The male secreting vesicles 

 (fig. 34) are much larger than usual and are spread 

 over both sides of the stomach and intestine asso- 

 ciated with the ovary. They are elongated, branched, 

 and irregular in form ; showing a disposition to dicho- 

 tomous division ; and are combined into dendritic 

 clusters or systems from which extremely delicate 

 tubes pass off that unite and go to form the vas defe- 

 rens, which accompanies the oviduct in its course to 

 the cloaca, where it opens close to the termination of 

 that conduit. 



1. Corella parallelogramma (O. F. Miiller) Hancock. 



(Plate XI, figs. 8 and 9 ; PL XXI, fig. 9 ; and figs. 



30-34 in text.) 



Ascidia parallelogramma 0. F. MULLER Zool. Dan. Prodr. 

 [1776], p. 226, no. 2737; [Zool. Dan. Icon. II (1780), 

 pi. xlix, ff. 1-3; Zool. Dan. Descr. II (1784), p. 25; and] 

 Zool. Danica, II [1788], p. 11, pi. xlix, tf. 1-3; [BRD- 

 GUIERE Hist. Nat. Vers, I (1789), p. 153, in Encycl. Meth ; 

 BOKY DE ST. VINCENT Vers, etc. I (1791), p. 135, pi. Ixiv, 

 if. 8-10, in Tabl. Encycl. Meth ; GMELIN Linnaai Syst. 

 Nat. ed. 13, I, pt. 6 (1791), p. 3125; Bosc Hist. Nat. 

 Vers, I (1802), p. 107; TURTON Gen. Syst. Nat. IV (1802), 

 p. 93; FLEMING in Edinb. Encycl. II (1811), p. 544; 

 LAMARCK Hist. Nat. Anim. sans Vert. ed. 1, III (1816), p. 

 124, and ed. 2, III (1840), p. 529; THOMPSON in Ann. 

 Nat. Hist. (1) V (1840), p. 94;] FORBES & HANLEY 

 Brit, Moll. I [1848], p. 34; [RUPERT JONES in Cyclop. 

 Anat. IV, pt. 40 (1850), p. 1201 ; CARUS in Proc. Aslimol. 

 Soc. II (1851), p. 266;] THOMPSON Nat. Hist. Ireland 

 [IV (1856)], p. 360; NORMAN in Zoologist, [XV, (1857), 

 p. 5708; DICKIE in Rep. Brit. Assoc, for 1857 (1858), p. 

 Ill; SARS in Forli. Vid.-Selsk. Christ. 1858 (1859), p. 

 64; SCHULTZE in Arch. f. mikr. Anat. XII, 2 (1862), pp. 

 178, 183 ; ALDER in Ann. Nat. Hist. (3) XI (1863), p. 157, 

 pi. vii, ff. 1, 2; in Nat. Hist, Trans. Nortlmmb. Durli. I 

 (1865), p. 11; and in Rep. Brit. Assoc. for 1866 (1867), 



