LIST OF THE PLATES. 



PLATE 



Anatomy. 



A. The Alimentary Canal and the Brain. 



B. The Reproductive Organs. 



C. Sections. 



Species. 

 I. LENTUNGULA ALGIVORANS. 



II. HlSTIOSTOMA ROSTRO-SERRATUM. 



III. Genus HISTIOSTOMA. 



IV. HISTIOSTOMA SPINIFERUM and H. PULCHRUM. 



V. PYRIFORME. 



VI. GLYCYPHAGUS DOMESTICTJS. 

 VII. SPINIPES. 



VIII. ., and G. DOMESTICUS. 



IX. PLUMIGER. 



X. CANESTRINII. 



XI. and G. PLUMIGER. 



XII. PALMIPER. 



XIII. 



XIV. PLATYGASTER. 



XV. DISPAR. 



XVI. ,, ORAMERI. 



XVII. and G. PLATYGASTER. 



XVIII. SCIURINUS. 

 XIX. 



