GAHMAN: THE CIIIMAEEOIDS. 261 



"The specimen (male) was bought in the Tokyo market and is marked as from 

 Kurihama, Province of Sagami ; there can be no doubt that fishermen of tiiat villaj;e 

 cauglit it in the deep waters (two hundred fathoms or more) ccmtiguous to ilisaki. 

 Its unique characters liad long been noted by us. 



" Unfortunately, I am not yet in possession of the original description of Hariotta 

 ralelghana by Messrs. Goode and Beax. But the sliort description, ' the extremely 

 elongate muzzle and tlie feeble claspers' as well as the comparison of the two 

 figures leave no doubt in my own mind that the two individuals figured belong to 

 the same genus. 



" Tliere can also be very little question that they belong to different species. 

 (1) Tiie general shape of the body, (2) the shape and size of the pectoral and ven- 

 tral fins, ('i) the point to which these fins reach when laid back, (4) the shape and 

 disposition of the dorsal fins, (5) distribution of the lateral-line sense-system all 

 seem to point to the specific distinction of the Atlantic and Pacific specimens. 

 The name Hariotta pacijica will be most appropriate to the Japanese species." 



It would be a matter of some difficulty from tliis notice, or from the outlines 

 accompanying it, to make a satisfactory identification ; it was only by com- 

 parison with the type that it might be done. No other description had been 

 published when the specimen of which the present writing treats was brought 

 by Dr. Agassiz from Tokyo. This specimen was dissected from one side and 

 drawings and descriptions were made from the preparations. In the second 

 volume of tlie Proceedings of the Now England Zoological Club, page 75, a 

 short preliminary to the present paper was published, in 1901, under the title 

 " Genera and Families of the Chimaeroids," in which it was shown that Pro- 

 fessor Mitsukuri's species did not belong to the genus Ilarriotta, known from 

 the Atlantic, that it represented a new genus, which was then characterized 

 and named Rhinochimaera, and that it with Harriotta constituted a new family, 

 the Rhinochimaeridae, of equal rank with the Chimaeridae and the Callorhyn- 

 chidae, the last also a new family. The genera and the families were briefly 

 characterized in the preliminary; the characterizations, of greater length and 

 slightly modified by the anatomical studies, are repeated in the present paper. 

 One question raised by the subsequent studies relates to the presence or ab- 

 sence of tritors in Rhinochimaera. On teeth the cutting edges of which have 

 not been worn with hard usage no tritors are visible; but if the extremities of 

 the minute calcigerous tubes to be seen with a lens on the cutting edges of 

 worn teeth are to be accepted as tritors, it is incorrect to say Rhinochimaera 

 has no tritors. Besides the possession of several series of molar-like tritors, 

 the structure of the proboscis in Harriotta, depressed instead of compressed, is 

 a very patent distinction. It was stated in the preliminary that the frontal 

 tenaculum is present on the males of Harriotta, as on males of Rhinochimaera, 

 Chimaera, and Callorhynchus, a fact which was denied in the original diag- 

 nosis of that genus. It was added that the frontal tenaculum is only acquired 

 by the young male somewhat late in his existence, about the time he becomes 

 sexually mature and the intromittent "claspers" have approached functional 

 maturity, the advent of the tenaculum coinciding nearly with the beginning of 



