197 



SPECIES 

 ... .. of the distal end of this carpus 



Length of the chela 



Length of the palm 



Length of the fingers 



Length of the nierus of the simple leg . . 



Width „ „ „ „ „ „ „ . . 



Length of the carpus „ „ ^ ^ • • 

 Width of the distal end of this carpus . 

 Length of the propodus of the simple leg. 



Width of the propodus „ „ „ „ . 



Length of the dactylus „ „ , „ . 

 Length of the merus of third leg . . 



Length of the carpus , „ „ . . . 



Length of the propodus „ „ „ . . . 



Length of tiic dactylus „ „ „ . . . 

 Length of the merus of fourth leg 



Length of the carpus „ r, n ■ • 



Length of the propodus „ „ , . . 



Length of the dactylus , „ „ . . 



Length of the merus of fifth leg . . . 



Length of the carpus , „ , . . . 



Length of the propodus „ ,, „ . . . 



Length of the dactylus „ „ „ . . . 



4 



0,43 

 1,76 

 1,04 

 0,72 



N" I, Stat. 71; N" 2, Stat. 260; N° 3 and 4, Stat. 274; N" 5, Stat. 282. 



Processa Leach. 



1,8 



0,275 

 0,76 

 0,22 



1,38 

 1,06 

 0,32 



Thirteen species of this genus have hitherto been described, but some must, no doubt, 

 be considered as invahd or as synonyms. Processa Couc/iii Bell from off the Cornwall coast 

 and from off Great Yarmouth was, as has been several times suggested, probably founded on 

 an abnormal specimen of the common Proc. canaliculata Leach: both the type and the only 

 other specimen known are, unfortunately, lost. Proc. sinuolafa (Risso) from Nice has not been 

 found back since its first description in 1816: a specimen from Nice, that once belonged to 

 the collection of Dr. Leach, exists, however, in the British Museum, according to Gr.w's "List 

 of the specimens of Crustacea in the collection of the British Museum, London 1847" and 

 it appears therefore desirable that a new detailed description of this rare animal should be 

 published. A third species, Proc. niediterratiea., from Nice was described in 1 9 1 5 by B. Parisi 

 (in: Monitore Zoolog. Italiano, Anno XXVI, N" 3, p. 65), but in the reprint which I had the 

 honour to receive from him, the author wrote in 191 8 with his own hand "non e nuova, ma 

 e la Processa canaliculata Leach (= N. edulisY'. Proc. macrognatha (Stimps.) from Hcmg Kong, 

 only known by Stimpson's short diagnosis, is perhaps identical with the common european 

 species, which is also recorded from Nagasaki and other Japanese localities; it should differ from 

 it by the stouter shape of the body and the shorter rostrum, but just in these characters 

 Proc. canaliculata is known to vary. 



Proc. canaliculata Leach, the type species of the genus, shows an almost cosmopolitan 



