130 K. RAJIUNXI MENON. 



The ovaries reach quite to the anterior end of the branchial 

 region. Median gonads are not present. The ovary (which 

 is solid in the young stages) is a hollow sac : in specimens in 

 which the ova are not fully developed, they are arranged round 

 the lumen. Certain globular, fat-like bodies of varying sizes 

 are also found among the ova. The ovary opens by the ovi- 

 duct to the outside, externally to the branchial pores. 



There can be no doubt that the form here described is 

 different from the three species of the genus described by 

 Spengel, and from the one described subsequently by 

 Benham. I dedicate it to one to whom I owe much. 



Of the two species of Tornaria found in the Plankton, one 

 is T. Krohnii and is very common. This has been previously 

 recorded from the Mediterranean and from the European 

 and American Coasts of the Atlantic. Glossobalauus 

 minutus, which occurs here, has also been recorded from 

 the Mediterranean and from the American Coast of the 

 Atlantic. This may be a mere coincidence, of course ; but it 

 may also be that T. Krohnii is the larva of Glossobalanus 

 minutus. 



The other species of Tornaria cannot be identified with any 

 of those described by Spengel. Figs. 5 and 6 represent the 

 larva from the ventral and dorsal aspects. It is about 

 1| mm. long. With the help of Spengel's terminology, this 

 form may be characterised as follows : — The ventral lobes of 

 the oral area are shallow and broad, and are secondarily 

 lobed. The portion of the pre-oral area which lies below 

 these ventral lobes and to the sides of the mouth is also 

 encroached upon on its outer side by secondary lobes of the 

 oral area. The upper dorsal lobes have secondary and 

 tertiary lobes. Lower dorsal lobes are well developed. 

 There are no lateral lobes. The ventral saddle of the 

 postoral area is long and narrow, as in 'J\ agassizi. There 

 is no secondary perianal ring of cilia. Round patches of 

 yellowish-brown pigment are found along the course of the 

 ciliated bands. They are placed on the side of these bands, 

 turned away from the oi'al area. They are also found along 



