376 The American Naturalist. [April, 
ZOOLOGY. 
The Senses of Pilumnus.—-The observations of M. Emile 
Racovitza prove that the otocyst of Pilumnus hirtellus, a small crab 
living in the rocks off Cape Abeille, near Banyuls, is an organ for feel- 
ing vibrations rather than for hearing. The crab feeds on small 
bivalves which live in holes in the rocks. When the bivalve moves 
its shell serapes the rock and the vibration is communicated to the 
crab in his hole, whereupon he promptly sallies forth and proceeds in 
the direction of his prey, feeling for it with his claws. He appears to 
recognize his food by the sense of touch rather than sight, since any 
object used to scratch the rock will attract the crab and be seized by 
him as readily as if it were his favorite bivalve food. (Comptes ren- 
dus de l’Acad. d. Sci., CX VIII). 
More Deep-Sea Fishes.—In the last number of the NATURAL- 
IST, we referred to the publication by Messrs Goode & Bean, of the U. 
S. Fish Commission, of some remarkable forms of deep-sea fishes 
dredged by the U. S. steamer Albatross. These were Hariotta, a new 
genus of Chimeroidei, at depths varying from 700 to 1000 fathoms ; 
Rondletia, a new genus of Iniomi, from 1600 fathoms; and Cetomimus, 
also of the Iniomi, at from 1000 to 1500 fathoms. In the present num- 
ber of the NATURALIST, we give figures of these remarkable forms, 
thanks to the Hon. Marshall MacDonald, U. S. Commissioner of Fish- 
eries. We add to these, figures of three remarkable forms of the order 
Opisthomi, belonging to the families Notacanthidae and Lipogenyidae, 
the latter a new family defined by Prof. Gill. Two new genera of the 
former are called Gigliola and Macdonaldia respectively, and they are 
quite distinct from Notacanthus.. Lipogenys possesses a peculiar suc- 
torial mouth structure. The mandibular bones are said to be attached 
to the extremities of the maxillary, and to be “free behind.” The lips 
are thick, rugose and contractile, and there are no teeth. The spinous 
dorsal fin is very short, and the eye is rather small. The only species 
is the L. gillii, which was taken at a depth of 865 fathoms. 
We should have preferred seeing some more-conspicuous zodlogists 
commemorated by these discoveries than Harriott and Rondelet ; and 
we have a feeling that gentlemen who have passed over to the majority 
like these two and Sir Walter Raleigh, do not appreciate the compli- 
ment as much as they would have done had they been still with us. 
