THE NAUTILUS. 87 



acters showed noteworthy variation, and I have considered them 

 all P. carolinianus. 



It is worthy of record that the specimens which were sent to 

 me in such excellent condition by Dr. R. C. Rush, were shipped 

 in a small wooden box filled with damp, absolutely clean moss. 

 Every specimen was alive. The slightest amount of dirt or 

 dust in the material in which the specimens are packed is fatal. 

 From one of Dr. Rush's letters I take the liberty of quoting 

 some interesting notes regarding the habits of the species. 



"It is very easy to collect specimens of this species, but very 

 difficult to send them any considerable distance and have them 

 live. If kept too moist they suffocate, and if allowed too much 

 air they dry up. I have had five-inch specimens die in twenty 

 minutes in strong sunlight. To keep specimens alive, place 

 them on the under side of an old piece of bark on the basement 

 floor, making certain that they are absolutely in the dark. 

 Feed them with any fungi and they will live for months. Cur- 

 iously the large specimens of this species are not found in damp 

 places in northern Ohio. They are found here in high, dry, 

 hard-maple and beech forests, on stumps and logs which have 

 not decayed much, in pockets under the bark. They feed at 

 night and go back to tb.3 same nest every morning. Very 

 rarely one will find them feeding on the under side of fungi in 

 dayliglit. It will interest you to know that nine of the speci- 

 mens I am sending came from a crack in a log, seven inches 

 long by two inches wide, and I left seven behind. They were 

 packed in like sardines." 



Philomycus ruhi, sp. nov. 



In alcohol, mantle smooth, drab gray above (Ridgway, 

 Color Standards and Nomenclature, pi. 46, 1912), lighter on 

 the sides, eye peduncles dark gray, eye spots black, tentacles, 

 situated beneath and very slightly outside the eye peduncles, 

 short, gray. Body terminating posteriorly in a sharp point. 

 Foot narrow, half the width of the body, cream- white below, 

 excepting at the anterior end, where it is dark red, fading at 

 the posterior end. The separation of the foot from the body 

 well defined. The body, showing at the sides between the foot 



