1879. | Zovlogy. 785 
mens; fins uncolored. It attains a length of nearly three feet. It 
ascends the streams in thousands in the spring, and is taken and 
dried in great numbers by the Klamath and Modoc Indians. The 
former call it Tswam. 4. Chasmistes brevirostris sp. nov. This fish 
does not exceed 14-16 inches in length, and has a differently formed 
head and muzzle from the C. Zzxatus. They are shorter, especially 
the muzzle, and the latter is without the hump produced by the 
protuberant premaxillary spines. Parietal fontanelle small. The 
lower lip-fold is only present at the sides of the mandible. Body 
nearly cylindric. Scales 12-74-11; radii, D. 11, A. 9. Color 
dusky above, silvery below; fins colorless. This fish is abundant 
in the lake, but I was informed by a Klamath Chief, that it does 
not ascend Williamson’s river in spring with the C. Zuxatus and 
Catostomus. Klamath name Xooptu. 4. Catostomus labiatus 
Gird. Very abundant; ehani ofthe Klamaths. 5. ? Mylophar- 
odon sp. Not certainly of this genus, and resembling the genus 
Anchybopsis, found fossil in the Idaho and Oregon Pliocenes. I 
was interested to find this species quite abundant. I am not yet 
able to ascertain whether the present species is one of those 
already named or not. 6. Gila. A species of medium or small 
size, and rather robust proportions. 8. Uvranidea. Undeter- 
mined ; a stout species, and very abundant.—Z£. D. Cope. 
New CLASSIFICATION OF THE CRUSTACEA.—The recent studies 
on the embryology of the king crab (Limulus polyphemus) has 
shown that there are some unexpected resemblances to Miem ode 
of development of the Arachnida, and while in our essay? on the 
development of this Crustacean we attempted to show that the 
arachnidan features were also to be found in certain crabs and 
shrimps whose development was exceptional, one or two natu- 
ralists, as E. Van Beneden and Dohrn, claim that Limulus is not 
a true Crustacean, but belongs next to or with the Arachnida. 
This seems to us an extreme view. Then followed the beautiful 
anatomical researches of Alphonse Milne-Edwards on Limulus 
polyphemus, in which he showed the singular relation between the 
vascular and nervous systems; the latter being enveloped by 
a ventral system of the arteries. The differences between the 
rvous system of the king crab and Arachnida has been already 
indicatacs It has not been, we think, sufficiently taken into 
account that a att isa generalized or synthetic type, combining 
with features of its own, certain resemblances to the Arachnida 
and to the normal acne, In its mode of paige its 
external gills, and in its circulatory organs it is, as we have pre- 
viously stated?. essentially a Crustacean, but should placed 
1 The Deepan Limulus polyphemus. By A. S. Packard, Jr. (Memoirs of 
the Boston Soc. of Nat. Hist.) Published March, 1 1872. 
2 AMERICAN NATURALIST, Vol. 9, p. 422, 423. July, 1875. 
3 Farther Observations on the Embryology of Limulus, with notes on its affinities 
2 AMERICAN NATOKALDT, À Nov., 1873, Vol. 7, p. 675- 
