THE NAUTILUS. 71 



ing are proposed as new : S. hachitana bowiensis, S. granidatissima 

 parva, S. g. latior, S. virilis (looks like a variety of hachitana, but 

 anatomy peculiar), S. v. circumstriata, S. v. huachucana. 



Oreohelix is carefully defined, but only the species of Arizona and 

 New Mexico are treated, and not even all of those. The very var- 

 iable series grouped under 0. strigosa huachucana is fully described 

 and illustrated. The new forms are 0. strigosa socorroensis (allied 

 to metcalfei), 0. barbata (very remarkable, the adult with an epi- 

 dermal fringe), 0. yavapai, 0. y. neomexicana (this species and sub- 

 species separated mainly on the anatomy ; the neomexicana has been 

 reported heretofore as hemphilli, which it much resembles), and 0. 

 chiricahuana. The last, along with 0. clappi Ferriss and 0. aval- 

 onensis Hemphill, goes in a new subgenus, named Radiocentrum, 

 distinct by the smaller number and the sculpture of the embryonic 

 whorls, and the somewhat modified genitalia. 



I wish to call attention to a few apparent peculiarities of distribu- 

 tion, which should be confirmed or disproved by future observers: 



(1.) On the east side of the Rio Grande, Oreohelix appears to get 

 no further south than the Sandia Mountains. It is totally unknown 

 in the Organs, Sierra Blanca, etc. On the west side of the river it 

 goes nearly to the Mexican boundary, at least. 



(2.) Sonorella gets as far east as the Organ Mts., but I have not 

 seen it from Sierra Blanca or the Sacramentos ; nor does it seem to 

 range northward even as far as the Sandias. 



(3.) The Organ Mts. mark the eastern limit of the levettei group 

 of Ashmunella, the species found there being mearnsi. One has only 

 to cross the valley to the Sacramentos to meet with the very different 

 rhyssa series. 



PUBLICATIONS RECEIVED. 



Antarctic Nudibranchs — Sir Charles Eliot has just published in 

 the Transactions of the Royal Society of Edinburgh a very inter- 

 esting paper on the Nudibranchiata of the Scottish National Ant- 

 arctic Expedition. In the preface he remarks on the absence or 

 extreme rarity of Dorids in the Antarctic, while in the tropics Dorida 

 are greatly more abundant than Aeolids. This seems the more 

 singular from the fact that the Dorids are tough and well-protected 

 animals for the most part, while the Aeolids would seem too delicate 

 for the stormy and cold seas (often below 30° Fahr.) of the extreme 



