254 BULLETIN OF THE 



Ophioglypha sinensis, Lym. var. ? 



Ophionereis dubia ? Lym. 



Ophiopsammium Semperi sp. nov. 



Ophiothela isidicola Ltk. (young) 



Astrophyton asperum Agas. (young) 

 << it 



' ' nudum sp. nov. 



In all, forty-five species, whereof eleven are new. These possess great 

 value as illustrating the fauna of the shallower waters about the Philippine 

 group, because Professor Semper passed several years in that region, and 

 searched diligently for animals of all sorts. On the whole, this collection 

 faithfully represents the fauna of the great ocean, although some rather com- 

 mon species, notably Ophiocoma Valencies and 0. pica, are missing. This 

 well may be, because species are often thus lacking in corners of faunal 

 regions, e. g. Ophiura brevicauda, abundant at St. Thomas, is almost wanting 

 in Florida. Of Astrophyton, besides .1. asperum, there is a new and beauti- 

 ful species, A. nudum, which, with A. clavatum and A. verrucosinn, make 

 four for the great ocean. To these may perhaps be added A. exiguam, in the 

 Garden of Plants, brought by Peron and Lesueur, in 1803, from the South 

 Sea. It is apparently a young one, having a disk of only 8 mm. in diameter, 

 which, with the upper surface of the arm, is granulated finely, and has larger 

 rounded grains among the smaller. Dr. von Martens need have no doubt 

 as to the occurrence of this genus in the limits of the Indian Ocean. We 

 have A. asperum not only from China and the Philippines, but also from the 

 Straits of Malacca, brought to the Garden of Plants by Eydoux, in 1832. 

 A. verrucosinn rests on the authority of a specimen from "Indian seas," in 

 the Garden of Plants, which may well be good, since such species as 

 Opldocnemis marmorata are found from Port Natal on the south to the Philip- 

 pines on the north. It seems in every way probable that deep dredging will 

 bring up not only plenty of these species, and of others like Trichaster 

 jMlmiferus, but also additional forms, in the neighborhood of Astromorpha. 



Homologies of Chewing Apparatus in Opiiiut.id;e. 



The skeleton of an Ophiuran within the circle of the disk (PI. VII.) con- 

 sists of the line of arm-bones, jointed one on the other, like vertebra? ; the 

 genital plates (Fig. 13, o) ; the radial shields (/) ; of certain irregular pieces 

 arranged along the margin of the disk (Figs. 5 and IS, s) ; and, finally, of the 

 strong forked pieces (Figs. 5, 11, 13, 18,/) which form the five angles of the 

 mouth, support the teeth, and thus make up the chewing apparatus. It is 



