Iy6 CEYLON PEARL OYSTER REPOET. 



Polypus, juv., B Plate II., fig. 4. 



A smooth form, with very prominent eyes and a few scattered granules on the 

 upper surface. 



Locality : Station LVI. (?), half-a-mile east of Dutch Modragam, second haul. 

 One specimen, sex (!) [244]. 



Polypus, juv., C Plate II., figs. 2 and 5. 



The specimens enumerated below all appear to me to be the young of one and the 

 same species, which it is just possible may be P. granulatus (Plate II., fig. 2). Their 

 most conspicuous characters are a plum]), rounded body, short arms, with a rudi- 

 mentary umbrella between them, a slight but distinct granulation on the back and 

 between the eyes ; there is a single row of rather large pale chromatophores on the 

 outer surface of the arms, and one or more bands of them run along the under surface 

 of the mantle parallel with the opening (fig. 5). 



Localities : Station L. (?), pearl banks, Cheval Paar, 4.3.02. One specimen [196]. 



Station XVIII., Palk Bay, S.E. of Catchetivo Island, 7 fathoms. One specimen [199]. 



Station II. or III., West Ceylon Two specimens [203, 204]. 



Pearl banks, Cheval neighbourhood, Gulf of Manaar. Fifteen specimens [247-2G1]. 



Polypus, juv., D Plate II., fig. 11. 



A young form, 10 millims. in length from the hinder end of the mantle to the eye, 

 with a short, rounded body, prominent eyes, with a small wart over each, long slender 

 arms (25 millims. to 30 millims. in length), united by a broad umbrella (10 millims. in 

 breadth, except between the dorsal arms, where it is much less), two irregular rows 

 of small chromatophores along the outer surface of each arm, and a conspicuous patch 

 of chromatophores on the ventral surface. There are two or three moderate-sized 

 warts on the back and a number of small ones on the broad portion of the upper 

 arms. The measurements are taken from specimen 227. 



Locality : Pearl banks, Cheval neighbourhood, Gulf of Manaar. Two specimens 

 [227, female ; 267, male]. 



This form agrees with that which I have marked A in the conspicuous jjatch of 

 chromatophores on the ventral surface and the rather wide, delicate umbrella, but it 

 differs in the presence of well-marked warts over the eyes, and in the chromatophores 

 on the aims being much less delicate and regular. I think they are the young of 

 distinct species. 



Polypus, juv., E. 



This specimen, 6 millims. in length from the hinder extremity to the eye, has a 

 roughish surface, small warts over the eyes, and two rows of chromatophores widely 

 separated along the outer surface of the arms, which are of moderate length 

 (10 millims. to 12 millims.). 



Locality : Station II., off Chilaw, west of Ceylon. One specimen, sex (?) [202]. 



