1906.] OF SOUTHERN INDIA AND CEYLOX, 673 



small pear-shaped sperma.tocyst (9 mm. x 3 mm.) full of brownish 

 matter. Below thi.s is the roughly spherical spermatotheca with 

 a diameter of about 20 mm., sessile, or rather forming simply a 

 dilatation of the tube. From the spermatotheca runs a tube 

 about 45 mm. long to the vestibulum genitale, and at the point 

 where it enters it there is a much laminated body of glandular 

 appearance which is probably the Blase of Bergh {I. c. p. 962). 

 No other organs could be identified with ceitainty. A foUiculate 

 gland found detached among the genitalia may perhaps have 

 been the blood-gland dragged out of place, and have had no real 

 connection with them. 



The eversion and protrusion of the buccal parts found in this 

 specimen have also occurred in the three smaller specimens, but 

 are less conspicuous owing to the relatively small size of the 

 organs. In the specimen examined by Bergh the buccal parts had 

 disappeared. No doubt they had been protruded and then acci- 

 dentally torn off. In Farran's specimen, too, " the whole buccal 

 mass had been everted through the mouth-opening, so that the 

 radula lay along the u.nder surface of the everted organ." It is 

 therefore clear that the buccal parts are habitually protruded in 

 pr^erved specimens ; but it is impossible to say whether this pro- 

 trusion is due to convulsive action at the moment of death, or 

 whether the living animal can protrude its radula voluntarilj'^. 

 Information as to its feeding-habits is much to be desired, for 

 whatever may be the cause of the protrusion, it is evident that 

 the buccal organs are of unusual size and strength. 



An inspection of the parts protruded in all Alder and Han- 

 cock's specimens, particularly of their musculature, suggests that 

 the portion nearest to the body of the animal (PI. XLVII. 

 fig. 2 a;) is everted, that is to say turned inside out, but that 

 the distal portion (fig. 2 h) is in its natural condition and 

 simply protruded. The smaller (but badly preserved) specimens 

 entirely support this view, because, in them, if the protruded 

 portion is straightened the radula is, or appears to have been, on 

 the upper side. But in the large specimens and in j\Ir. Farran's 

 specimen the radula lies on the under side ; a position which it is 

 diificult to explain, unless we suppose that the radula has been 

 dragged round and is not in its normal place. 



Phyllidiid^. 



Few recent additions have been made to this family, which, 

 though abunda,nt in the Indo- Pacific, has not hitherto proved 

 nvimerous in species. It appears to me, however, that Phyllidia 

 zeylanica Kelaart mvist be regarded as separate from Ph. varicosa, 

 vfith which Bergh unites it. The beautiful a^nimal described by 

 Bergh as Ph. ccelestis (Siboga, pp. 182-3) is perhaps a distmct 

 species ; but its coloration, though lighter and brighter, is 

 essentially that of Ph. varicosa. Many specimens at any rate of 



45* 



