542 PROCEEDINGS OF THE NATIONAL MUSEUM VOL.84 



ing a cheval-de-frise of tiiiy spicules — the dactylostyle. Irregularly 

 in depressions among the projections are the ovoid hii'sute gastro- 

 styles. Here and there are tiay secondary dactylo pores without pro- 

 jecting lip, or with only a rudimentary one. In the latter a very tiay 

 style can be detected. 



On the basal part of the colony where there is no crowding (pi. 66, 

 fig. 2) one can find numerous primitive cyclosy stems composed of a 

 central gastrostyle with 2 to 5 associated projecting dactylotomes 

 oriented so that the sht and its style face toward the gastrostyle, the 

 top of which may be in the bottom of a very shallow depression or 

 else nearly flush with the general surface of the coenosteum, Tliis is a 

 more generalized condition than in Allopora, where the dactylopores 

 are coordinated with the gastropore to form a circumscribed cup. 

 The simpler arrangement suggests an ancestral stage of both genera. 



In the large colony much of the space between the projecting dacty- 

 lotomes is occupied by ampullae, probably female, crowded so close 

 together that only a tliin, often perforated grillelike wall separates 

 them. The external wall is also a perforated grille. The subspherical 

 cavity varies 1.5 to 3 times the diameter of an average gastropore. 

 In a cleaned specimen these crowded ampullae have almost a frothy 

 appearance (pi. 70, fig. la, a). In a small specimen from station 3159 

 are smaller ampullae, which are probably male (pi. 70, fig. la). These 

 form a slight convexity, often at base of a projection, and the cavity 

 varies in diameter from a little less to a little more than that of a 

 gastropore. 



The surface of the coenosteum is minutely fenestrated and spongy, 

 with branched processes more irregular in the hollows than on the 

 projections and more pronoimced on the distal than on proximal parts 

 of branches. 



Color of dried colony, pink, varying from near eosine pink to rose 

 pink of Ridgway's nomenclature. One small specimen is jasper pink. 



Type. — In the United States National Museum and Museum of 

 Comparative Zoology. "A large stone Avith several specimens upon 

 it was obtained by Count Pourtal^s in 1873, and is now in the Museum 

 of Comparative Zoology." A small fragment of this, now in the Na- 

 tional Museum, was used as the type. 



Type locality. — 50 to 100 fathoms about the FaraUone Islands, 

 CaHf. 



Specimens examined.- — The type. Also from Point Sur, Cahf., 50 

 to 90 fathoms, snagged by rock-cod fisherman of Vito Bruno's, 

 Monterey, Cahf., large colony, gift of Dr. G. Van Wagenen; station 

 3158, 8 small specimens; station 3159, 5 small colonies; Gulf of Georgia, 

 A. Agassiz (no other data), 1 large colony. Museum of Comparative 

 Zoology. 



