TYLOCARCINUS STYX. 95 



Alph. Milne Edwards (Nouv. Arch. Mus. Hist. Nat. VIII , 

 p. 247. pi. XI , fig. 4), but in the third specimen the 

 hands are slender , the fingers straight and meeting over 

 their whole length. I regard these differences as indi- 

 vidual ones , as has been done also by Mr. Miers (Descript. 

 of new or little known Spec, of Maioid Crustacea , in : 

 Ann. and Mag of Nat. Hist, for July 1879). 



Lophactaea c rist at a Alph. Milne Edwards. 



Lophactaea cristata, Alph. Milne Edwards, Nouv. Arch. 

 Mus. t, I , pag. 246 , pi. XVI , fig. 1. There are 5 speci- 

 mens collected , one nearly adult male, one nearly adult female 

 and three young females. — In all these specimens the 

 crest on the upper margin of the hand is very distinctly 

 developed, though being granular, but it is not only by 

 this crest, that our species may be distinguished from the 

 nearly allied granulosa Rupp., but especially also by its 

 quite different facies, by the much coarser granules of the 

 carapace , which are found also on the mesogastrical and 

 cardiacal regions. — 



Breadth of carapace of the largest male specimen 32 mm. 

 » » » » » » female » 36 mm. 



Lophactaea granulosa Rupp. 



As has been remarked already by Mr. Hilgendorf (Mo- 

 natsberichte Berlin. Akad. Nov. 1878, pag. 787), also a 

 small granulated crest-like ridge often appears to occur 

 on the upper margin of the hands of the common Lo- 

 phact. granulosa , a species distributed throughout the whole 

 Indo-Pacific region. I therefore think a very young male 

 specimen of the collection (Breadth of carapace 17 mm.) 

 to belong to the granulosa , the granules of the carapace 

 being much smaller than in equally-sized specimens of the 

 preceding species , and the mesogastrical and cardiacal re- 

 gions being nearly smooth. 



Notes iroin the Ijeycleii JVLusseuin , \'ol. 111. 



