I. '08. 



78 



The follov\ing table will show the measurements (in mm.) 

 of a few of the more perfect specimens examined. 



Total 















No. 



length, 





Length 



Length 



Length 



Length of 



Length of 



of dorsal 



rostrum 



Sex. 



of 



of 



of 



first 



fifth 



teeth 



to 





rostrum. 



carapace. 



abdomen. 



pereiopocl. 



pereiopocl. 



on 



telson. 















rostrum. 



73-5 



9 



8-5 



17 



37-5 



27-5 



60 



27 



73 



i 



8 



17-5 



37 



27-5 



58 



27 



72 



9 



8-5 



17 



36-5 



275 



56-5 



29 



70 



9 



9-5 



17 



35-5 



28 



59 



26 



58 



i 



6 



14-5 



30 



23 



47-5 



25 



53 



9 



5 



12-6 



28 



20 



43 



25 



49 



i 



4-5 



12 



25 



20 



43 



24 



47 



9 



5 



10-5 



24-5 



17-5 



38-5 



27 



36 



9? 



3 



9 



19 



14 



... 



27 



The eggs are small, some on the point of hatching do not 

 measure more than I'l x '67 mm.; they are, of course, con- 

 siderably smaller than this when not so far advanced. Smith 

 gives *75 to '8 x "55 mm. as the average size. This author also 

 states (1886) that one female examined was carrying more 

 than 20,000 eggs. 



Colour in life. — The carapace and abdomen are transparent 

 pinkish white ; the anterior portions of the former usually ap- 

 pear dull scarlet owing to the oral appendages and gastric 

 regions showing through the faintly pigmented walls. In the 

 abdomen the intestine show^s through very plainly dorsally ; 

 in some specimens the pink pigment is very faint, in others 

 much darker, becoming quite red at the posterior margin of 

 each of the first four somites. The rostrum is quite clear and 

 transparent. The eyes show traces of red pigment on the 

 stalks; the cornea is black, with orange red reflections. The 

 antennules are faintly reddish basally, with red flagella. The 

 basal joints of the antennae are milk-white ; the scale is milk- 

 white proximally with its distal two-thirds pale red. The 

 outer maxillipedes and j^ereiopods are red, the former almost 

 scarlet ; the basal joints of the pleopods are pinkish , the rami 

 are pale red. The uropods and tip of the telson are pale red. 

 The fringes of setae are colourless, and the small and 

 numerous eggs are dark orange. 



Size. — This species seems to be of much smaller average size 

 in the Easit Atlantic than in the West. The largest specimen 

 examined measures 83 mm., and ovigerous females may mea- 

 sure as little as 60 mm. Smith has recorded an example of 

 145 mm. from the east coast of the United States and num- 

 bers of his specimens were more than 100 mm. in length. 



The East Atlantic specimens here described^ as A', ensifer, 

 var. exilis, differ from Smith's description, of ensifer (1882, 

 1884) in certain details which probably justify the retention of 



