358 MEMOIRS OF THE CARNEGIE MUSEUM. 



ticulated distal half; dorsal fins well developed, the first consisting of about ten 

 relatively stout rays, the second and the anal each comprising at least twice that 

 number of more slender rays; principal caudal fin comprising about eighteen to twenty 

 stout raj^s above and below. Jugular plates four times as long as broad, covered 

 with sparse elongated tubercles; operculum, cheek-plates, and mandible delicately 

 tuberculated. Scales ornamented with numerous irregularly and closely arranged 

 elongated tubercles." (A. S. Woodward, I. c, Pt. II, p. 410). 



The above synonymy and diagnosis are taken from A. Smith Woodward, who 

 regards it as still doubtful whether the Coelacanth remains described by ThioUiere 

 from the Upper Jura of Cerin, under the name of Undina cirinensis (Poiss. Foss. 

 Bugey, pt. i, 1854, p. 10) are not identical with the type-species. 



The status of the specific names hitherto applied to Cerin forms, namely U. 

 cirinensis and U. minuta, will be readily understood from the following observations 

 by Willemoes-Suhm (Palseontographica, 1869, Vol. XVII, p. 79): 



"ThioUiere beschreibt aus Cirin einen kleinen Coelacanthus [= Undina] der 

 sich von Mlinsters penicillatus nur dadurch unterscheidet, dass, wahrend dieser 

 oben 21 und imten 17-18 Strahlen in der Caudale zeigt, oben nur 15 und unten 13 

 vorhanden sind. Wagner fand nun unter den ebenfalls aus Cirin dem Miinchener 

 Museum eingesandten Fossilien einen sehr kleinen Coelacanthen, der im Ganzen 

 gut erhalten ist, doch den hintern Korpertheil von der zweiten Rlickenflosse an 

 verloren hat. Bei Aufstellung dieser Species legt er nun besonderes Gewicht auf 

 die Kleinheit des gefundenen Exemplars die ihm als Charakter genligt. Ich kann 

 mich dieser Ansicht nicht anschliessen. . . . Falls vollstandigere kleinere Exem- 

 plare gefunden werden, wird sich vielmehr wahrscheinlich herausstellen, dass auch 

 der Coelacanthus minutus zum Thiollieres Ccelacanthus cirinensis gehort." 



Thiolliere's description of his so-called Undina cirinensis was published in 

 1854, and the small form named by Wagner Undina minuta, likewise from Cerin, 

 was not described until 1863, hence Thiolliere's name has priority, in case both are 

 not synonyms of U. penicillata. The original of the French author's description 

 is stated to have had a total length of 28 cm. and maximum depth of about 6 cm. 

 Wagner's type was considerably smaller, and may well have been an immature 

 individual. A much larger specimen of Undina than any hitherto made known, 

 and one which presents differences apparently having specific value, is that 

 described below. 



3. Undina grandis sp. nov. (Plate XLVIII, fig. 2). 



A large and imperfectly definable species, estimated to have equalled U. 

 gala in size, and differing from it and other described forms in the structure. 



