RATHBUN— MARINE BRACHYURA 



209 



Providence, 29 fms., Sta. D 3 ; 1 ? juv. : 50 — 78 fms., Sta. D 4 ; 1 $. Amirante, 

 34 fms., Sta. E 9 ; 1 ? juv. : 20—25 fms., Sta. E 13 ; 1 $ soft shell : 35 fms., Sta. E 14 ; 

 1 ? ovig. : 39 fms., Sta. E 16 ; 2 ? soft shell : 30 fms., Sta. E 21 ; 2 $, 1 ?. Seychelles, 

 34 fms., Sta. F 8 ; 4 J, 6 ? (2 ovig.), 4 juv. : 37 fms., Sta. F 9 ; 1 $. 



Largest specimen, $, Sta. E 21, C. 1. 9 mm., C. b. 13*3 mm. 



In large specimens the fifth lateral tooth is larger, in proportion to the first three 

 teeth, than in smaller specimens. There are 3, 4 or 5 spines on the palm : in adults 3 

 or 4 ; in young specimens 4 or 5. 



53. Thalamita exetastica macrospinifera, subsp. no v. 



Providence, 50 fms., Sta. D 11 ; 1 juv. Amirante, 39 fms., Sta. E 16 ; 1 $ type. 



$, C. 1. 10-2 mm., C. b. 14*3 mm. 



Combines the characters of T. exetastica spinifera Borradaile and T. exetastica 

 macrodonta Borradaile *, that is : 



1. There are spines along the hinder edge of the propodite of the last leg. 



2. The last side-tooth is nearly as large as the third and projects somewhat more 

 than the rest. Fourth tooth rudimentary. 



3. The median frontal lobes are only a trifle narrower than the submedian 

 (as 8 : 9). 



In No. 1 it resembles spinifera, in No. 2 it resembles macrodonta, in No. 3 it is 

 typical exetastica. 



Our subspecies resembles Borradaile's specimens in having the granulation of the 

 cheliped more dominant than the squamiform markings. 



54. Thalamita gardineri Borradaile. 



Thalamita gardineri Borradaile, in Gardiner, Fauna Maldive and Laccadive Arch., i. 

 1902, p. 205, text-fig. 36. 



Coetivy; 2 f, 3 $ (2 ovig.). 



Largest specimen ($), C. 1. 14 - 8 mm., C. b. 23 mm. 



Agrees with points i to iv of Borradaile's description. The chelipeds of the adult $ 

 (larger than his type) are distinctly unequal ; the upper surface of the arm beyond the 

 carapace is covered with squamiform markings, as is also, but faintly, the lower part 

 of inner surface of palm. There are from five to seven spines on the hinder edge of 

 the last propodite. 



55. Thalamita sexlobata Miers. 



Thalamita sexlobata Alcock (4), p. 87. 



Amirante, 28 fms., Sta. E 6 ; 1 $ : 34 fms., Sta. E 9 ; 1 $: 25—80 fms., Sta. Ell; 

 1 $ : 20—25 fms., Sta. E 13 ; 1 ?. Seychelles, 34 fms., Sta. F 8 ; 1 $. Praslin, from 

 weed ; 1 juv. 



* Gardiner, Fauna Maldive Arch., i. 1902, p. 203. 



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