60 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 14 



In the Atlantic area the species has been recorded by Smitt, Osburn, 

 and Canu and Bassler from the Gulf of Mexico, Florida Straits, north 

 of Cuba and the south shore of the Caribbean Sea, and Hastings recorded 

 it from Gorgona, Colombia, in the Pacific. 



Hancock Stations: 1325-41, Santa Catalina Island, California; 2167, 

 Dewey Channel, west coast of Lower California; 591-36, Puerto Escon- 

 dido, Gulf of California; 129-34, Socorro Island and 219, Clarion Is- 

 land, west of Mexico; 155-34, Albemarle Island and 170-34, Chatham 

 Island, Galapagos; shore to 60 fms. Also, Galtsoff collection. Gulf of 

 Panama, on pearl oysters. The known distribution on the Pacific coast 

 is from southern California to the Galapagos Islands. 



Alderina brevispina (O'Donoghue), 1926 

 Plate 6, fig. 3 

 Callopora brevispina O'Donoghue, 1926:35. 

 Membranipora lacroixii var. triangulata, O'Donoghue, 1923 :25, part. 



This species very definitely belongs in the genus Alderina. It might 

 readily be mistaken for the more southern A. smitti {A. irregularis, Smitt, 

 non d'Orbigny) but for its much larger dimensions. It has the same 

 zooecial and opesial form, the cryptocyst is of the same type and the 

 operculum is a counterpart of that of smitti except for size. Dietellae 

 present. A minute spine, sometimes reduced to a tiny nodule and usually 

 entirely wanting, on each side opposite the operculum. Zooecial length 

 0.65 to 0.80 mm, width 0.50 to 0.60 mm. 



The ovicell is more transverse than that of smitti, less rounded on 

 the distal side and it is much broader, 0.40 mm. 



Known only from British Columbia waters, Gabriola Pass and Banks 

 Island. A specimen from Cadboro Bay, Victoria, British Columbia, in the 

 writer's possession, extends the range slightly southward. 



Genus MOLLIA Lamouroux, 1916 

 Zooecia more or less separated and connected by lateral and proximal 

 tubes ; cryptocyst extensive ; operculum attached to strong condyles ; short 

 dorsal tubes for attachment to the substratum ; no avicularia, no spines. 

 Ovicell hyperstomial. Genotype, Eschara patellaria Moll, 1803:75. 



The position of this genus in the classification has always been ques- 

 tionable. Lamouroux (1816:115) removed patellaria from the old Lin- 

 naean genus Eschara where Moll had described it and placed it next to 

 Flustra. Heller (1867:94) redescribed it as a new species, Diachoris 

 simplex, placing it in that genus because of the connecting tubules. Smitt 



