454 Records of the Indian Museum. [Vol,. XXIV, 



Siriella quadrispinosa Hansen. 



Siriella quadrispinosa, Hansen, 1910, p. 32, pi. ii, figs. 5a-/. 



Locality. — Pamban, Gulf of Manaar, from weeds, 0-2 fathoms. 

 February 24th, 1913. Four males and two females ; largest male, 

 75 mm., largest female, 5-5 mm. 



Remarks. — These specimens are in substantial agreement 

 with Hansen's description and figures. They differ mainly in 

 having the spines on the outer margin of the proximal joint of 

 the exopod of the uropod never more than six in number and 

 confined to the distal third of the margin. In the smaller speci- 

 mens the inner pair of spines at the apex of the telson is equal 

 in size to the outer pair but in larger specimens these spines are 

 as figured by Hansen. 



Distribution. — Hitherto only known from the ' Siboga ' speci- 

 mens taken among the Islands of the East Indies, near Saleyer. 



Siriella vulgaris Hansen. 



Siriella vulgaris, Hansen, 1910, p. 34, pi. iii, figs. 2a-k. 



Locality, — Port Blair ; Andaman Islands. 

 St. 3. Seventeen specimens, 4-7 mm. 

 St. 11. Seven specimens, 4-7 mm. 

 St. 13. One male, 7 mm. 



St. 19. One male and two females, d'S~7'5 mi n. 

 St. 21. Two males and one female, 6-7 mm. 

 St. 32. Two males, fourteen female^. 



'Investigator' St. 556:— 12° 40' N., 98° 26' 30" E , one 

 specimen. 



Distribution. — Found at 21 stations in the East Indian Archi- 

 pelago by the ' Siboga.' Hansen states that it is common near 

 the shores throughout the area explored by the ' Siboga.' It is 

 evidently a common species at Port Blair in the shallow waters 

 down to 12 fathoms. 



biriella affinis Hansen. ? 



Siriella affinis, Hansen, 1910, p. 35, figs. 3a-/. 



Locality. — Kilakarai, Gulf of Manaar, from weeds, 0-2 fathoms, 

 February 1913. Four males and four females, 5-7 mm. 



Remarks : — I am doubtful about the identification of these 

 specimens. They belong to Hansen's group I and are closely 

 allied to S. vulgaris and S. affinis. From the former they are 

 distinguished by the much smaller terminal lobe to the antennal 

 scale and by having only 3-5 spines on the outer uropod. In 

 these respects and indeed in most of their characters they agree 

 with S. affinis but they differ as follows : (1) the male specimens 

 agree with the females in the characters of the rostral plate and 

 antennal scale, Hansen described marked difference between the 

 sexes in these characters ; (2) the large spines on the lower inner 



