1894.] Zoology. 71 
In parvus the ratio of mastoid breadth to greatest ante-orbital jugal 
breadth is 88.8, in simiolus it is 82.6, in similis it is 86.8. 
Of the two, parvus much more nearly resembles similis than simiolus 
in cranial characters and it is possible that a fuller series will show 
parvus to be merely a small, dark subspecies of similis. 
SamuEL N. Ruoaps. 
Zoological News, Vermes.—lIn a recent paper on the Ocnero- 
drilus, Mr. Gustav Eisen gives a detailed description of the anatomical 
structure of the 10 known species of this genus. All are tropical or 
semi-tropical in their habitat, and appear to be restricted to the Amer- 
ican Continent. According to the author, the systematic position of 
this genus is a most interesting one, as showing the affinities with both 
the water and with the land Oligocheeta, and bear a close relationship 
to Beddard’s new genus Gordiodrilus. 
The paper includes a diagnosis and a synoptic arrangements of the 
species. (Proceeds. Cal. Acad. Sci., Vol. III). 
Mollusca.—A list of the land and marine shells of the Galapagos 
Islands, compiled by Mr. R. E. C. Stearns, has been published in the 
Proceeds. U.S. Nat. Mus., Vol. XVI. The list is based on the collec- 
tion made during the voyage of the Albatross in 1887-88, supple- 
mented by examples contained in the U.S. Nat. Mus. and in other 
collections from authentic sources. The total number of species is 288, 
varieties 30, making in all 318, which are segregated as follows. Ma- 
rine Lamellibranchs 61; Scaphopods 1; Gastropods, marine species 
205, with 13 varieties; Gastropods, land species 31, with 17 varie- 
ties. 
Pisces.—A_ new shark, Centrina bruniensis, from the Tasmanian 
Coast, and a new species of pelagic fish Centrolophus maoricus, from 
New Zealand, are described by Mr. J. D. Ogilby in the Records of the 
Australian Museum, Sept., 1893. The latter, according to the author. 
is quite as interesting a discovery as that of Tetragonurus some years 
ago at Lord Howe Island, and bears a close analogy to it, both genera 
being Mediterranean types. 
A new Cyprinoid fish, Couesius greenii from the headwaters of 
Frazer River, B. C., is described by Dr. D. S. Jordan. The species is 
related to Cowesius plumbeus of the upper Missouri and Lake Superior 
region, from which species it differs in the larger size of the scales and 
in some details of form. The head is especially large and heavy. 
(Proceeds. Nat. Mus., Vol. XVI). 
