90 THE NAUTILUS. 
mulina occurring in New Zealand, five are represented in Tas- 
mania. Most remarkable is the preponderance of Gerontia, a sec- 
tion represented in New Zealand by two species only, and of Phriz- 
gnathus, which is also well represented in New Zealand. A very 
striking feature is the almost total absence of Endodonta, there 
being one species of Endodonta s. str. (E. dispar Braz.) and one of 
Charopa known from Tasmania. Rhytida is more abundant in 
Tasmania, whilst Rhenea is represented by two species in each 
country. 
There can be no doubt about the great antiquity of these forms, 
as they must date at least from the Cretaceous period. 
New Zealand, Christchurch, October 4, 1893. 
IN MEMORIAM—ROBERT WALTON. 
[Ss 
It is with sad hearts that we record the death of our young friend 
Robert Walton. While out collecting on Saturday, November 11, 
along the steep bank at West Conshohocken, he slipped and fell as a 
freight train was passing below, receiving a terrible gash on the 
head and having one of his legs crushed beneath the wheels, from 
which he died at 8 p. M., the accident occurring about noon. He 
was born in Halifax, England, July 17, 1875, and came to this 
country in the summer of 1889. He was a collector from boyhood, 
studying nature with that enthusiasm which only a born naturalist 
can. He was not content with a collection of shells alone; his was a 
collection of the mollusca. He studied their anatomy, working out 
their jaws and dentition, the darts from the Zonites, and the testa- 
ceous shell-plates, from the Limaces. He was a close observer, and 
by his zealous collecting he found many forms not before recorded 
from this section. Among his rarities were reversed specimens of 
Zonites celiarius and Zonites ligerus, and I remember his saying, 
when we met only a few days before his sad accident, that he found 
the reversed Zonites cellarius at West Conshohocken. He was to be 
appointed as a Jessup student at the Academy of Natural Sciences, 
and was looking forward, as only a young heart can, to the day 
when he would be studying and working there among the objects 
he so dearly loved. Mr. Pilsbry was looking forward with a great 
deal of pleasure to the time when he would have such a valuable 
