NAUPLIOID STAGE IN PALINURUS. 231 



phyllosoma, which is more adapted to a horizontal mode o£ progression. The 

 biting and grasping seta^ of the mouth-parts and other appendages are not yet 

 developed, and the larva does not appear to feed during this stage. The Cape 

 Crawfish occurs in sreat abundance on the West Coast of South Africa in 

 marked contrast to the comparative scarcity of the European Palinurus. Is 

 it possible that the occurrence of this short stage, which appears to be of a 

 little assistance in the life-history of the animal, may have something to do 

 with this relative abundance ? If so, the Cape Crawfish might with profit be 

 introduced into the fisheries of Europe, an undertaking which would be 

 comparatively easy, owing to the hardy nature of this animal. 



Bibliography. 



1 DoHRN, A. — Untersuchungen, &c. 6. Zur Entwicklungsgeschichte der 



Panzerkrebse (Decapoda Loricata). Zeitschr. f. Wiss. Zool. Bd. xx., 



1870. 

 2. Claus, C. — Untersuchungen zur Enforschung der genealogischen Grund- 



lage des Crustaceen-S-ystems. Wien, 1876. 



Ueber einige Schizopoden und niedere Malakostraken. Zeit. f. Wiss. 



Zool. Bd. xiii., 1863. 

 3 RiCHTERS, F. — Die Phyllosomen. Ein Beitrag zur Entwicklungsgeschichte 



der Loricaten. Zeit. f. Wiss. Zool. Bd. xxiii., 1873. 



LINN. .TOTIEN.— ZOOLOGY. VOL. XXXII, 20 



