680 



REPORT OF NATIONAL MUSEUM, 1898. 



Bijyes aud Euchirotes I thought this statement might have been due to 

 badly preserved specimens, but it is quite possible that the two 

 genera may diSer in this respect. 



In the Uuchirotes hiporus the liver is situated far caudal to the heart. 

 Both extremities are bilobate, the caudal extremity unequally, as the 

 right lobe is much produced. It is separated from the left by a deep 

 fissure, and the gall bladder is exposed on the left side, and it is not 

 inclosed as in Auguidiie. The trachea passes above the heart to a 

 point a short distance beyond it, where, without dividing, it enters a 

 single biauriculate lung. The lung lies entirely ventrad of the gut, and 

 extends along the left side of the liver part of its length. The heart is 

 halfway Jjet ween the end of the muzzle aud the caudal end of the liver. 



The intestine presents two expansions proximad to the large intes- 

 tine. The moderate constriction divides the latter into colon and sec- 

 tion, and the former has a proximal caecum. The corpora adiposa are 

 large. The transverse section of the liver is crescentic. It is sup- 

 ported by a gastrohepatic mesentery, and a sheet on the right, which, 

 as it arises from the hepatic border, may be a hepatolateral, but which is 

 probably homologous with the right hepatic of other Annulati. A left 

 gastropulmouary sheet. Hepatoventral single. 



EUCHIROTES BIPORUS Cope. 



Euchirotes hiporus Cope, American Naturalist, 1894, p. 436, fig. 5. — Van Den- 

 burgh, Proc. Cal. Acad. Sci., 1895, p. 135. 



Chirotes canaliculatus Streets, Bull. U. S. Nat. Mus., No. 7, 1877, p. 37. — Yarrow, 

 Bull. U. S. Nat. Mus., No. 24, 1883, p. 38.— Cope, Bull. U. S. Nat. Mus., No. 

 32, 1887, p. 47.— Belding, West Amer. Scientist, III, 1887, p. 97; not of 

 Lac^p^de. 



Fig. 140. 



Euchirotes biporus Cope. 



X2. 



Lower California. 



Cat. No. 12599, U.S N.M. 



The snout is short, rounded, and very convex. The limbs are very 

 broad and short, with five perfect clawed digits. The larger head 

 plates are a rostral, three labials, a nasal, an ocular, a preocular, two 

 suboculars, one sui)raocular, a very large undivided prefrontal, and a 



