J\/*ova Acta Academics J\i\iturce Curiosorum. 379 



the rudimental bones found in some Cephalopodous Mollusca. The 

 details of the modifications observed in different fishes, which constitute 

 the principal value of this paper, will not admit of a satisfactory analysis; 

 we can therefore only indicate them as containing much interesting 

 information for the comparative anatomist. They are partly original and 

 partly selected from the works of previous writers on the Osteology of 

 Fishes. 



Two species oi Auricula, Lam., found in turning over the plants collec- 

 ted by him in the Island of 0-Wahu, constitute the " Species Novas 

 " Conchyliorum Terrestrium, (quas) ex Insulis, Sandwich dictis, attulit 

 " Adelbertus de Chamisso." They are here described and figured as the 

 Auriculm 0-waihiensis and sviistrorsa ; and an indication is also given 

 of a third, of which only a fragment was observed. 



Dr. Otto's " Beschreibung einiger neuen, in den Jahren 1818 und 

 '• 1819, in Mittellandischen Meere gefundener Crustaceen," contains 

 detailed descriptions, accompanied by coloured figures, of nine new 

 species of Crustacea from the Mediterranean Sea. These are referrible 

 to the genera Portunus, Inachus, Alpheus (2 species), Callianassaf 

 Praniza, Cymothoa and Caliyus (2 species) . The localities in which 

 they were found are Nice and the Bay of Naples. 



The Memoir " Ueber die Daphnia sima und ihren Blutkreislauf," by 

 Dr. Gruithuisen, is a valuable contribution to the anatomy of this singular 

 genus. In young individuals of Daphnia sima the valves are so transparent 

 as to allow of the circulation of the blood being traced through the entire 

 body with little difficulty ; and this circumstance has enabled the authour 

 to give an outline of its course on the plate which accompanies his memoir. 

 The following is the summary with which he concludes his more detailed 

 account. " The veins descending from the arms, and ascending from 

 " the cheliferous tail and from the valves, pour the blood into the venous 

 " heart : the venous heart empties itself through a foramen into the 

 " arterial heart; from which the great mass of blood is sent upwards to 

 " the arms, to the head and to the mantle, and downwards to the tail, 

 " whence it returns by the veins, &c." Both the arterial and venous 

 hearts are stated to consist of sac-like muscular membranes, capable of 

 quick and powerful contraction, especially the former, in which the 

 vivacity of the pulsations has been noticed by several writers. Only 



