84 BRITISH TUNICATA. 



developed, and extends over the left side of the stomach; 

 it is composed of two lobes, one being larger than the 

 other, and is broken up into irregular lobules which 

 are composed of minute dendritic tufts the csecal 

 extremities of which give to the surface of the organ 

 a pimpled appearance. 



The reproductive organs (PL XXXI, fig. 7) form 

 two elongated masses, each composed of a double series 

 of rounded lobes or masses attached in regular order 

 along the excretory ducts (PI. XXXI, fig. 8). The ova 

 are placed in the proximal extremity of the lobes, the 

 sperm-vesicles, which are distinguished by their large 

 size and pale colour, at the distal or outer extremity. 



We first met with this pretty species in (luernsey in 

 1853. It has since been sent to us from Lulworth 

 Cove by Mr. Jeffreys, and it was also dredged in the 

 Channel Islands by Messrs. Jeffreys and Norman in 

 18(35. [Other localities are given on p. 82.] 



4. Cynthia ovata sp. nor. 



(PI. XXX, figs. 4 and 5 ; PI. XXXII, figs. 3-5 ; PI. 

 XXXIII, fig. 1 ; and figs. 54 and 55 in text.) 



Bod i/ regularly ovate, inflated, smooth, yellowish 

 white, deepening into fawn colour towards the aper- 

 tures ; laro-elv attached bv the left side or near the 



Of/ V 



back. Apertures wide apart ; the branchial terminal, 

 the atrial about three quarters down, or near the base ; 

 both rather prominent. Test thin but tough, regularly 

 and delicately squamose. Mcu/tle thin and transparent, 

 flesh-coloured, covered with fine interlacing muscular 

 fibres. Tf'itfttrttliir filamfitts simply pinnate, about 

 fifteen, nearly of equal length. Branchial *<ir with 

 six folds on each side. Oral laiit-iinr with filaments. 

 Reproductive <>r</nitx forming a double row on each 

 side; those of the left side enclosed within the loop 

 of the intestine. 



Length nearly an inch ; Ircmltli one third less. 



Hah. Adhering to shells. 



