Verrill, Notes on Radiata. 593 



the acute angle, are much larger and irregular in form. There are 

 four, round, genital orifices, of which the two anterior are largest and 

 nearest together. 



Agassizia scrobiculata Vai 



Voyage de la Venus, Zooph., PI. 1, figures 2-2 f, 1840 ; Agassiz and Desor, Ann. des 

 ScL nat., viii, p. 20. 1847 ; A. Agassiz, Bulletin Mus. Comp. Z06I.. i, p. 276, 1870. 



Agassizia suhrotunda G-ray, Ann. and Mag. Jfat. Hist., vii, p. 133, 1851 ; Catalogue 

 Echinida of British Mus., p. 63, tab. 3, fig. 2, 1855 ; Verrill, Proc. Best. Soc. Nat. 

 Hist, vol. xii, p. 381, 1869; Amer. Jour. Sci., xlix, p. 95, 1870. 



A ovulum Liitken, Vidensk. Medd., p. 134, tab. 2, fig. 8; VerrOl, these Trans., p. 320. 



Of this species there are from La Paz about a dozen specimens, 

 mostly more or less broken, which show but little variation. They 

 agree well with Gray's figure, but not with those in the Voyage de la 

 Venus. Mr. A. Agassiz has, however, seen the original of the latter, 

 and finds it identical with the A. suhrotunda of Gray. The figure is 

 inaccurate. ^4. ovulum Ltitk. is the young of the same species, and is 

 more oblong in form than the larger specimens. 



One of our larger specimens is I'YO inches long; 1-55 broad; 1-25 

 high. A smaller one is 1"50 long ; 1*35 broad ; 1'05 high. 



1 have taken several small specimens from the stomach of a fish, 

 collected at Panama by Mr. F. H. Bradley. Mr. J. A. McNiel also 

 sent larger specimens from Panama. 



No. 9. — The Echinoderm-Fauna of the Gulf of California and 

 Cape St. Jjucas. 



In order to give a better idea of the fauna of the Gulf of California, 

 I have brouglit together, in the following list, all the species hitlierto 

 recorded from there.* The Holothurians are entirely unknown, and 

 doubtless many additional species of the other orders remain to be 

 discovered, when systematic dredgings shall have been undertaken. 

 All the species hitherto described belong to the littoral and laminarian 



* Dr. Chr Liitken ha>; informed me by letter that the Museum of Copenhagen has 

 received a collection from Altata. nearly opposite La Paz, which contained Ophiolepis 

 variegata; a new species of OpMoglypha, aUied to 0. Sarsii; Heliaster Kuhiniji ; R. 

 microhrachia; a new genus and species of Star-fish, with 30-35 long arms, and allied 

 to Acanthaster and Pedicellaster ; a second species of Cidaris ; Astropyga depressa; 

 Boktia rosea; and Meoma grandis. Also from Mazntlan a new species of Luidia, 

 with remarkably short margmal spines {L. brevispina Ltk). These were probably ob- 

 tained by dredging in deeper water. 



