153 



NK rii HOPS, Leach. 



Hepln-i>)it. l.csu'h. Mulac. Pod. Rrit. text preceding pi. xixvi : Milne Kdwanls, Hist. N't. Crnit. II. :' 

 8 pence Bute, Chnlleiiifnr Crust. Macrura, p. 184. 



Nostrum of good length, tit-pressed at least in its pro xinial half, armed with 

 tcrtli. Carapace (without rostrum) more than half the length of the abdomen, 

 divided into two portions by a very broad and deep cervical groove, usually 

 sculptured with longitudinal ridges. Telson almost square, about as long as the 

 caudal swimmerets, the outer of which is transversely fissured. 



Eyes very large, reniform, deeply pigmented. The basal joint of the anten- 

 uular peduncle is as long as the 2nd and 3rd joints combined, and has no 

 " stylocerite " : the antennular flagella are shorter than tin cant pace proper, the 

 outer being slightly shorter and stouter than the inner. Antenna I scale toliaceous, 

 of moderate length, not concealing the terminal joint of the antennal peduncle. 



1st pair of thoracic legs chelate, longer and vastly stouter than any of the 

 others, but little unequal in the male, their joints prismatic. l!nd ~>th legs sub- 

 cylindi'ical, comparatively slender, the 2nd and 3rd chelate. 



The abdominal appendages from the 2nd to the 5th have short toliaceous 

 rami. The modified 1st pair of the male are pointed and scoop-shaped, tin- 

 anterior lip of the scoop having at its far end a roughened facet for making fast 

 when these appendages are apposed. The male appendix of the endopodite of 

 the 2nd pair of appendages is short, spatulate and ecurvate. 



The branchial formula is as follows : 



I'leurobranchiir. 



Total 6 + 7 ep. 10 4 = 20 + 7 ep. 



The podobranch of the 2nd maxillipeds is small but well plumed. 



89. Nephrops thomsoni, Spence Bate. 



thomsoni, Spence Bate, Challenger Crust. Macrura, p. 185. pi. v\r. 

 Sygt. Ac., X. 1897-98, p. 273. 



ri : Ortmunn. /ool. Jahrb. 



Nephrops thomsoni var. attdamanica, Wood-Mason. 



Nephrops andamanica Wood-Mason, Alcock, Ann. Mag. Nat. Hist., March 1894, p. 226: Ortmann, loc. cit. 

 ILLUSTRATIONS OF THE ZOOLOGY OF THE INVKSTIGATOI, CBDSTACKA PLATE IV. PIG. I AND VIII. Via. 5. 



The rostrum, which reaches beyond the antennal peduncles and is about 

 20 



