1885.] PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 167 



of C. maculafus. The ventral and tbe pectoral are not longer in our 

 specimens than they are made to appear in the figure of the alleged new 

 species. 



The notion seems to have got abroad among some of the European 

 ichthyologists that North America is a comparatively benighted and 

 barbarous country, whose natural history is still in its infancy ; it is 

 perhaps owing to this impression that we are startled by information 

 concerning the supposed occurrence of Coiius within the tropics, and of 

 a species of Platycephahis * in tbe Potomac River. 



Our common little Cottus ceneus of Mitchill also has been redescribed, 

 from a New York si:)eciraen, under the name ot Cottus (Acanthocottns) 

 ancepsA 



As a general rule it will be safe to intrust the novelties offish distri- 

 bution in our country to its resident ichthyologists 



DESCRIPTION OF A NEW CRUSTACEAN ALLIED TO HOMARUS 



AND NEPHROPS. 



By SIDNEY I. SMITH. 



Any additions to the small number of known types of existing Ho- 

 maridae are of special interest on account of the relations of the group 

 to the Astacidfe and to several fossil forms, and for this reason it seems 

 desirable to give a special notice of the following species recently taken 

 in the Caribbean sea by the Fish Commission steamer Albatross. 



Eunephrops, gen. nov. 



The species for which this generic name is proposed agrees with Ho- 

 marus and differs from Nephrops and Nephropsis in the number and ar- 

 rangement of the branchiae, and in the evenly swollen branchial regions ; 

 it agrees with Nephrons and Homarus and differs from Nephropsis in 

 l)ossessing antenna! scales and well-developed eyes; it agrees with Ne- 

 phropsis and differs from Homarus and Nephrops in having very large 

 antennal spines, and in being without any spine on the second segment 

 of the peduncle of the antenna; and it agrees with Nephrops and differs 

 from Homarus and Nephropsis in having slender and carinated chelae. 



Eunephrops Bairdii, sp. uov. 



Female. — Tlie carapax is nearly as broad as high, and the branchial 

 r«vi<''i''^ ^ud the dorsum, except in front, are evenly conv^ex and rounded. 

 The cervical suture is conspicuous and very deep, extends round be- 

 neath tbe narrow lateral lobe of the gastric region and joins the middle 



* Platijcephalus americanua, Sauvage, Nouv. Archiv. Mus. (2), i, 148, pi. ii, f . 3 (head 

 only). Potomac River. 



t Cottus (AcanthocottHs) anceps, Sauvage, Nouv. Archiv, Mus. Hist. Nat., Paris (2), 

 i, 1878, p. 145, pi. i, f. xiji, 



