^ Ivi 



The existence of monstrous specimens of Lepidopterous insects 

 in which the head case of the caterpillar is retained in the 

 butterfly state has long been known, the first instance on record 

 being the Phalfena heteroclita of M tiller, represented in the 

 Memoirs of the French Academy. Professor Wesmael subse- 

 quently published an account and figure of a similar monstrosity 

 in Nymphalis Populi, and Dr. Hagen has supplemented these by 

 a beautiful figure of Morpho Eurylochus, still retaining the head 

 of the larva. Numerous other instances are recorded by Dr. 

 Hagen in his paper on these monsters in the Memoirs of the 

 Museum of Comparative Zoology at Harvard Coll. Mass. (vol. ii. 

 No. 9). 



A short article on the partially retarded development of 

 specimens of both sexes of Anisopteryx vernata and pometaria is 

 given by B. P. Mann in Proc. Boston S. N. H. xviii. 201. 



The interesting peculiarities exhibited in the development of 

 the Crustacea from the egg to the perfect state continue to attract 

 much attention. A memoir on this subject by Mr. Spence Bate, 

 containing descriptions of the larvae of thirty-eight genera of 

 Podophthalmous Crustacea, has been presented to the Royal 

 Societ3^ The memoir of Dr. Claus on this subject has been 

 noticed above. 



A memoir by F. W. Putnam on the habits of the blind crayfish, 

 and the reproduction of lost parts, is published in Proc. Boston 

 Soc. N. H. xviii. p. 16. 



M. Hesse has continued his memoirs on the rare and new 

 Crustacea from the coasts of France in the ' Annales des Sciences 

 Naturelles ' (vol. iii. of the sixth series of the zoological part of 

 that work), containing a memoir on the development of the larvfe 

 of the Paguridie, and vol. iv. Ser, vi. (47th year) comprising 

 "Nouvelles Observations sur les Metamorphoses embryonnaires 

 des Crustaces de I'ordre des Isopodes sedentaires," and descrip- 

 tions of two new species of the parasitic genera, Athelgus and 

 Pleurocryptus, belonging to the family Bopyridse. The plates 

 accompanying this memoir {ire in the usual stjde of the author's 

 designs. 



A memoir on the habits of the hermit crabs, by M. Agassiz, 

 has also been quoted (Ann. Nat. Hist., Jan. 187 G). 



A very important memoir " On the Development of Lepas 

 fascicularis and the Archizoea of Cirripedia," by the late Dr. 



