244 PERCY SLADEN TRUST EXPEDITION 



H. b. 1-6. 



W. L. 1. 48 ; merop. 1. 14 ; carp. 1. 5'5 ; prop. 1. 15 ; dact. 1. 1T5. 

 W. L. 2. 45 ; merop. 1. 13-6 ; carp. 1. 6 ; prop. 1. 13*4 ; dact. 1. 9. 

 W. L. 3. 37-5 ; merop. 1. 12 ; carp. 1, 6'5 ; prop. 1. 10*5 ; dact. 1. 6. 

 W. L. 4. 32-3 ; merop. 1. 10-5 ; carp. 1. 6 ; prop. 1. 8 "6 ; dact. 1. 5 -3. 

 This species is distinguished from all others of the genus* by its slenderness, scarcity 

 of hair, and flattened rostral spines. 



201. Lambrachceus ramifer Alcock. 



LambrachcBUS ramifer Alcock (1), p. 1G8, pi. 3, fig. 1 ; Illus. Zool. Investigator, 

 Crust., pt. iv, 1896, pi. 18, fig. 3. 



Amirante, 30 fms., Sta. E 21 ; 1 $. 



The rostrum is broken off near its base. The specimen is somewhat larger than the 

 figured type, being 7 '6 mm. wide, and 10'4 mm. long from the anterior of the supraorbital 

 spinules to the posterior margin. The carapace appears considerably rougher, and the 

 tubercles of the third abdominal somite more prominent. 



202. Achceus lorina (Adams and White). 



AchcBUS lorina de Man, Abh. Senck. naturf. Ges., xxv. 1902, p. 645. 

 Amirante, 22 — 85 fms., Sta. E 10 ; 1 ? : 35 fms., Sta. E 14 ; 1 £ ovigerous. Seychelles, 

 39 fms., Sta. F 3 ; 3 $, 1 ? : 34 fms., Sta. F 8 ; 1 $, 1 ? ovigerous. 

 These specimens agree with de Man's description above cited. 



203. Achceus brevifalcatus, sp. nov. \ 

 Achceus affihis Rathbun, 1906, p. 877 ; not A. affinis Miers, Alcock. 

 Seychelles, 39 fms., Sta. F 4 ; 1 ? : 44 fms., Sta. F 5 ; 1 $. 



£. — The body is much like that of A. lorina, but more elongate. The rostral horns 



Fig. 2. Acliceus brevifalcatus, sp. nov. 



end in small slender spines ; the angle separating them is less than a right angle, is 

 rounded at the base, and is continued posteriorly by a deep furrow. Upper margin of 



* Type, M. rostrata (Linnseus) = Stenorhynchus rostratus of authors. 



