THE NAUTILUS. 119 



very good outline figures of all the species, will be of the greatest 

 use to students of the Unrones of this region. The synonymy given 

 under some species, such as U. huckleyi, obesus, etc. is rather alarm- 

 ingly extensive, and some of his conclusions may cause our Unio- 

 specialists to hurl (verbal) missiles at Mr. S.'s devoted head, "just 

 to show there's no ill feeling ; " but the Uniologist must leai-n 

 to dodge these little things or take them in good part, as they are 

 all incident to the pursuit of a noble science. One new species, U. 

 snbluridus, is described, from Orange Springs, Volusia Co., Fla. 

 AVe are sorry to see that by some oversight., Mr. S. has given to 

 Lea the beautiful Anodonta of the Florida lakes. It was previously 

 described by Thomas Say, and attains a much larger size than the 

 figures given by Lea or Simpson. — jBT. A. P. 



Cypr^a chrysalis Kiener. — This species, which apparently has 

 not been seen by Reeve, Sowerby and Roberts, who quote their 

 descriptions from Kiener, is commented upon and described by 

 Melvill in the October number of the Journal of Conchology, 

 issued last month. He places the species between irrorata Sol. and 

 quadrimaeulata Gray ; and it is considered by him a good species, 

 possessing some of the attributes of the C. fimbriata Gmel. var. 

 microdoii Gray, some of G. (^Naria) irrorata Gray, and others of 

 quadrimaeulata Gray, but differs from all in the produced extrem- 

 ities. 



Cypr.ea amphithales Melv. is also discussed in the same paper, 

 a more perfect specimen than the type having been obtained from 

 Port Elizabeth, S. Africa. This species has the characters of 

 Cypneovula, combined with those of " Luponia " algoensis. It has 

 lately been figured by Sowerby in " The Marine Shells of South 

 Africa," pi. 5, figs. 94-96. 



Post Pliocene Shells. — In the January Nautilus, p. 103, a 

 list of semi-fossil shells from Belten, Texas, is given. The Zonites 

 mentioned without specific name is a large form of Z. indentatus 

 Say. The Planorbis is trivolvis ; and the Physa is a very slender 

 form, like a small Ajilexa hypnorum, or the slenderest sort of a Ph. 

 ptomilia Con. It seems to be new, but is represented in Mr. Cran- 

 dall's collection by a single specimen. 



Spirula fragilis found on the beach near Gay Head, 

 Mass. — The stranding of Spirula fragilis on Nantucket has been 

 described in Binney and Gould's Invertebrates of Massachusetts. 

 It may be of interest as showing the further distribution of this little 



