365 



The specimens are much smaller than those in the Indian Museum from Persian Gulf. 

 The length of the first pair of walking legs exceeds that of the arms bv about the last 

 segment only, as Nobili (N., p. 105) found in his Persian Gulf specimens. H.b. H.l. 

 is of same order as ratio recorded by Nobii.i and by Calmax (G, p. 28). 



There is no distinct abdominal tooth in the males; just a slight convexity in (a) 

 adult male, more marked in (b) adult male. 



Pseudophilyra melita, de Man, 1888 A.2, p. 253. 



Localities : Trincomalee, six specimens ; coral reefs. Gulf of Manaar. one specimen ; 

 pearl banks, Gulf of Manaar, four specimens. 

 Description : d, g, h,j, adult. 



{'j)6- (A) J. (;")<?. 



10-25 12-75 13-50 



0-88 0-90 0-89 



1-93 1-90 1-96 



0-50 0-52 0-50 



(a)yg.6". (c)yg-c?. (<*)<? 



G.l. . . . 8-75 9-50 9-75 



C.b.-C.l. 0-88 0-89 0-87 



Ch.l.-C.l. 1-94 1-89 1-87 



H.b.-=-H.l. 0-50 0-48 0-50 



(J)yg. ?.(<")? OV. (/) ? OV. (l) ? OV. (/.:) ? ov. 



9-00 975 10-00 13-00 1375 



0-92 0-90 



1-67 1-67 



0-53 0-53 



Sex difference negligible in G.b. and in H.b., but marked in Ch.l. 



C.b.-C.l. , 

 H.b. -H.l. 

 Ch.l. -G.l. 



Mean adult d" = 0"89 

 ? = 0-90 

 <S = 0-50 

 ? = 0-51 

 6" = 1-91 

 ? =1-69 



range of variation c = 



Heterolithadia fallax (Henderson), 1893 A.2, p. 261. 



Localities : Pearl banks, Gulf of Manaar, two specimens (a, e) ; coral reefs, Gulf of 

 Manaar, two specimens (b, d) ; Trincomalee, one specimen (<). 

 Description : () young J. ('/) young $ . (<) ovigerous $ . 



13 



1 

 1 

 I 

 



00 

 04 

 50 

 45 

 66 



The gastro-cardiac groove is very inconspicuous in all 



