44 Memoirs of the Indian Museum. [Voi,. Ill, 



(7) The large coarsely granular cells of unknown function occur in the peduncle in 

 the young stages of the male. They are spherical, and are filled with large spherical 

 granules or more properly vesicles. I have not been able to distinguish the nucleus. 

 They have a degenerate appearance. 



III. ABSENCE OF A RUDIMENTARY OVARY IN THE 



MALE OF SCALBELLU^I PEBONII, GRAY. 



Through the kindness of Dr. Caiman and of the authorities of the British 

 Museum I was able to examine a specimen of the male of S. peronii. This specimen 

 was most excellently preserved, and after examining it entire in cedar- wood oil I 

 obtained a complete set of sections. 



These sections were first of all examined for the cells which Gruvel regards as 

 the rudimentary ovaries, but none were found. The only cells with large nuclei and 

 distinct nucleoli were the cells of the cement glands. I could not find any cells 

 differing from them in appearance in the situation defined by Gruvel — namely, above 

 the cement glands. 



The rostral duct in S. peronii resembles very closely that of the male of 5. 

 squamuliferum. As in the latter species, the walls of this structure were examined in 

 vain for any trace of a rudimentary ovary. 



Cement glands of the male of 5. peronii.^OmYel (7) states that the cement 

 glands are entirely contained in the peduncle — " acineuses très lobées." His figure 

 (pi. iii, fig. 4) represents them as occupying the upper half of the peduncle. 



In my specimen they did not extend below the upper eighth of the peduncle, 

 but they extended well into the lower portion of the capitulum. In fact they formed 

 a cup, the hollow of which was the lowest portion of the paUial cavity. They were 

 compact, and not lobate. The cells are entirely uniform, and are identical in appear- 

 ance with the non-granular cement cells of 5. squamuliferum. I was able to trace one 

 cement duct into their substance. 



IV. THE ANATOMY OF THE MALE OF SCALPELLUM 



BEXGALENSE, ANNANDALE. 



Plate vi, fig. 7, represents the general outline of the male of 5. hengalense. 

 There is no marked outward boundary between the peduncle and capitulum. The 

 appendages, etc., have been described by Dr. Annandale (i). 



The mouth cavity is small in comparison with the size of the capitulum; since the 

 wall of the capitulum is relatively thick, the true body is also of course small. 



The adductor scutorum muscle persists in its usual situation, although in the 

 majority of specimens there are no scuta. It may be able to narrow the opening of 

 the palliai cavity. 



Alimentary system. — The alimentary canal has the usual V-shape. Both mouth 

 and anus are open. The stomach is a fairly large sac, but it, as well as the other 



