154 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



The Genital Organs are placed in the intestinal loop 

 close to the stomach. The ovary forms a small rounded 

 lump in the centre, and is surrounded by the testis, com- 

 posed of a very large number of elongated spermatic 

 ■resides arranged in a crescentic curve around the ovary. 

 The spermatic vesicles are united in twos and threes by 

 line ducts (PI. VI, fig. 9), which converge to the centre of 

 the ovary, and finally all unite to form two ducts which 

 run side by side dorsally till they pass between the horns 

 of the crescent formed by the testis, when they join to 

 form the vas deferens, which turns anteriorly and first 

 crosses the intestine, so as to reach the ventral side of 

 the rectum, and then crosses that tube obliquely and 

 terminates on its dorsal side not far from the anus (PI. VI, 

 fig. 9, v. cl.). 



This species,* which was dredged in the Gulf of 

 Manaar, is closely related to Ecteinascidia turbinata from 

 Bermuda, and E. diaphanis from the Malay Archipelago, 

 but differs from both notably in the condition of the 

 tentacles and the dorsal lamina, and less markedly in 

 other points. The dorsal lamina is in a particularly 

 interesting state as it shows a transition from the ten- 

 tacular languets of E. turbinata to the broad membrane 

 with marginal teeth of Sluiter's E. (Sluiteria) rubricollis, 

 as described by Ed. Van Beneden. 



The course of the alimentary canal also shows an 

 approach to the latter species in the abrupt right-angled 

 bend between the intestine and the rectum. The course 

 of the vas deferens is remarkable, and differs from that of 

 E. diaphanis. There is not the least doubt that it 

 crosses the rectum, as shown in fig. 9. 



* The type specimen has been returned to Mr. Thurston, and will, I have 

 no doubt, be deposited in the Government Central Museum, Madras. 



