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The carapace, rostrum included, measures 12 mm. and, without it, 9,4 mm.; total length 

 39 mm., just as loiii;- as the single female upon which this evidently rare species was established. 

 The rostrum which projects horizontally forward and hardly reaches the end of the eyes, is 

 armed with 8 teeth in addition to the epigastric tooth ; of tliese 8 teeth two are on the carapace, 

 the 3'''^ just before the orbital margin and they reach to the tip; the 3'"^' to the last tooth 

 rapidly decrease in size, so that the foremost tooth is very small. The epigastric tooth, that has 

 the same size as the 2"'^ rostral tooth, is 3-times as far distant from the i^' tooth as the i^' from 

 the 2"''; post-rostral ridge prominent, reaching almost to the hinder margin of the carapace. 

 Outer orbital angle rather sharp. The branchial regions of the carapace are a little pubescent ; 

 they are finely punctate and separated by a strip of larger puncta from the dorsal regions of 

 the carapace. There is a short, tran.sverse suture just above the 4''' pair of legs. 



The y^ abdominal somite is conspicuously carinate along two-thirds of its length, the 

 anterior third part being smooth and there are traces of a carina on the 2"''. Telson distinctlv 

 and rather broadly grooved on its anterior half, the groove fading away posteriorly, its lateral 

 margins are unarmed and it is nearly as long as the uropods. 



Eye-peduncles a little shorter than the first joint of the antennular peduncle, that e.xceeds 

 the antennal scales by a third of the terminal joint; the latter measures two-fifths the 2"'^ article. 

 The upper (outer) flagellum is 17,5 mm. long, one and a half as long as the carapace (rostrum 

 included) ; the basal thickened part of this flagellum measures one-eighth its total length ; 

 the other flagellum is 15 mm. long, little shorter than the upper. 



The external ma.xillipeds reach almost the end of the antennal scales. 



Both the basis and the ischium of the a"'^ pair of legs are armed with a strong spine 

 and there is also a spine on the second joint of the 3''<^ legs. I observe moreover a small, 

 sharp tooth at the far end of the ischium of the i^' pair, but the second joint of these legs 

 seems to be unarmed. The 3''^ pair of legs e.xtends to the end of the antennal scales. The 

 slender legs of the 5''^ pair that measure 23 mm., almost twice as long as the carapace (rostrum 

 included), project with a little more than their dactyli beyond the antennal scales. The petasma 

 fully agrees with Alcock's figure. The short transverse suture on the carapace above the 4"^ pair 

 of legs and the spines with which the chelate legs are armed, are described neither by Henderson 

 nor by Alcock. 



Remarks. Penaeus stenodactylits Stimps. from Hongkong is most closely allied and 

 perhaps identical. The only differences seem to be the following : the posterior fourth part of the 

 carapace is not carinate, the carapace is finely granulated dorsally and the external maxillipeds 

 extend beyond the antennal scales. 



General distribution: Gulf of Martaban (Henderson) ; off the Madras coast (Alcock). 



737. Atypopenaeiis dcarinatus de Man ^). 



J. G. DE Man, in: Notes from the Lcydeii Museum, Vol. XXIX, 1907, p. 135. 



l) dcanntiitis^ disarmed, because this species bears iio hepalic sjiine. 



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