152 BRITISH TUNICATA. 



The genitalia are placed in the loop of the intestine 

 near to the lower extremity of the abdominal cavity, 

 the ovary appearing on the right of the alimentary 

 tube, the testis being spread over both sides of it. 

 The ovary is a rather conspicuous organ in the form 

 of a bunch of grapes, in which the berries are of various 

 sizes. The oviduct or central support, like the stem 

 of the fruit, is seen in the midst of the ova; but how 

 the eggs find their way to the atrium, where they 

 appear to be incubated, is not known. 



The testis is a much-branched organ, the ramifica- 

 tions are extremely fine, and, dividing dichotomously, 

 terminate in numerous, elongated, fusiform vesicles 

 which are united in pairs ; or in other words the 

 ultimate twigs may be said to bifurcate, each branch 

 being immediately enlarged so as to form an elongated 

 ca3cal vesicle. The vas deferens originating in this 

 organ is sufficiently conspicuous; passing up by the 

 right side of the alimentary tube, it penetrates the 

 lower wall of the cloaca, and terminates by the side of 

 the anal outlet. 



1. Clavelina lepadiformis (0. F. Miiller) Savigny. 

 (Plate XLIX, figs. 1 and 2 ; PI. L.) 



AscliUa lepadiformis 0. F. MULLER Zool. Dan. Prodr. [1776], 

 p. 226, no. '2738; [Zool. Dan. Icon. II (1780), pi. Ixxix, 

 f. 5; Zool. Dan. Descr. II (1784), p. 119; and] Zool. 

 Danica, II [1788], p. 54, pi. Ixxix, f. 5 ; BEUGUIEEE Hist. 

 Nat. Vers [I (1789),] p. 151, in Encycl. Metli. ; [BoEY 

 DE ST. VINCENT Yers, etc. (1791), p. 1H5, pi. clxiii, f. 10, 

 in Tabl. Encycl. Meth. ; GMELIN Linna?i Syst. Nat. eel. 13, 

 I, pt. 6 (1791), p. 3126; Bosc Hist. Nat, Vers (1802), 

 p. "106; TUETON Gen. Syst. Nat. IV (1802), p. 95;] 

 LAMAECK Hist. Nat. Anim. sans Vert [ed. 1, III (1816), 

 p. 126, and] eel. 2, III [1840], p. 533; [STARK Elem. Nat. 

 Hist. II (1828), p. 117; (?) SCHULTZE in Zeits. f. wiss. 

 Zool. II, 2 (1862), p. 178]. 



Awidia gelatina EATHKE in Miiller's Zool. Danica, IV 

 [1806], p. 26, pi. cxliii. (Non \_A*cidia, gelatinosa] 

 LINNJEUS [Syst. Nat, ed. 12, I, pt. 2 (1767), p. 1087].) 



