PEROPIIORA ANNECTENS. 4I 



Apertures both terminal, brtiuchial six lobed, atrial five or six lobed 

 (though the number of lobes is not constant for either orifice). A va- 

 riable number of yellow pigment spots on the lobes of the branchial 

 opening. 



Tentaclen about twelve in number (freqitently more), of different lengths, 

 irregularly scattered on the inner surface of the branchial siphon. 

 Irregular in arrangement. 



Branchial Apparatus. Siiymata in four circles, about eighteen in each 

 half circle. Horizontal membranes present. Internal papilhe con- 

 spicuous, each consisting of a post-like connecting bar, from near the 

 inner end of which project two processes, the one anterior, the other 

 posterior. Dorsal langnets three in ni;mber, one for each transverse 

 vessel. Each turned to the right side. 



Duct of the neural gland is funnel-shaped, opening to the right of the 

 median line. 



Genitalia situated in the loois of the digestive tube, the testes exceedingly 

 variable as to the number of its lobes, from one to eight having been 

 observed in diftereut individuals. 



I. GExNERAL DESCRIPTION. * 



As thus defined, the species is not certainly known to 

 exist elsewhere than in Monterey Bay. I have collected 

 Perophora at Point Reyes, north of San Francisco Bay, 

 and at Santa Catalina Island, off the coast of Southern 

 California. But at neither of these points, nor elsewhere 

 on our coast, though I have searched quite carefully at 

 several places, have I found the compounded form. In 

 addition to the difference in this regard, there are cer- 

 tain other differences, greater or less in different colonies, 

 and apparently different localities, that may be sufiicient 

 in extent and constancy to make it worth while to recog- 

 nize other species than the one now described. 



I leave the question as to what shall be done with the 

 Perophora of our coast that can hardly, in the present 

 state of our knowledge, be included in the new species, 

 as I have defined it, because it seems to me wiser to ten- 

 tatively leave a partially known group without a name, 

 pending further investigation, than to tentatively name 



