208 PERCY SLADEN TRUST EXPEDITION 



46. Thalamita prymna (Herbst). 

 Thalamita prymna Alcock (4), p. 78. 



Egmont, reef; 1 $ juv. Cargados Carajos, reef; 2 $, 1 ¥ juv. Coetivy ; 1 $, 1 ?. 



47. Thalamita poissonii (Audouin). 

 Thalamita poissonii Alcock (4), p. 81. 



Peros, Coin; 2 $, 2 ? immature. Saya de Malha, 150 fms., Sta. C. 1 ; 1 ? 

 immature. 



Largest specimen {$), C. 1. 10'8 mm., C b. 16 mm. 



The tip of the 5th lateral tooth forms a regular curve with a line connecting 

 the 1st, 2nd, and 3rd teeth ; all the teeth, except in some cases the 1st, are spiniform. 

 The posterior boi'der of the propodite of the last pair of legs is armed with 4 to 6 spinules. 

 The teeth on the anterior border of the arm are acute. 



48. Thalamita admete (Herbst). 

 Thalamita admete Rathbun, 1906, p. 874. 



Salomon ; 2 $. Egmont, reef; 1 $, 2 ?. Amirante, 29 fms., Sta. El; 1? juv. : 

 29 fms., Sta. E 2 ; 2 ? (1 ovig.). Seychelles, 31 fms., Sta. F 2 ; 3 juv.: 34 fms., Sta. F 8 ; 

 1 ^juv., 1 ? juv. Coetivy; 1 $. 



49. Thalamita margaritimana, sp. nov. (Plate 15, fig. 12). 



Cargados Carajos, 30 fms., Sta. B 2 ; 2 $ (1 is type), 2 $ ovig. Seychelles, 34 fms., 

 Sta. F 7 ; 1 juv. : 34 fms., Sta. F 8 ; 1 $. 



Type $, C. 1. 15-8 mm., C. b. 26 mm. 



Differs from T. auauensis Rathbun (Bull. U. S. Fish Comm. for 1903, part in, 1906, 

 p. 874, pi. 12, fig. 1) (1) in having the fifth lateral spine longer, being produced as far 

 as the third tooth ; (2) in the great roughness of the whole surface of the hand ; it is 

 covered with flattened bead granules, and the ridges are strong and formed by a row 

 of bead granules. 



Near T. granosimana Borradaile (Fauna Maldives, i. 1902, p. 202) in which the 

 fourth side tooth is small but not vestigial as in this new form. 



50. Thalamita quadrilobata Miers. 

 Thalamita quadrilobata Alcock (4), p. 84. 

 Cargados Carajos, 20 — 25 fms., Sta. B 17 ; 1 ^juv. 



The basal joint of the antenna bears four slender sharp spines. 



51. Thalamita integra Dana. 

 Thalamita integra Alcock (4), p. 85. 



Diego Garcia, lagoon; 1 $ : barachois ; 3 $ (1 soft shell), 1 ?, 3 juv. 



52. Thalamita investigatoris Alcock. 



Thalamita investigatoris Alcock (4), p. 85 ; Illus. Zool. Investigator, Crust., pt. vin, 

 1900, pi. 47, figs. 1, 1 a. 



