270 A. S. PACKARD, Jr., ON THE RECENT 



A small, slender, white species, the erect tubes in the young longer than the width of 

 the branch. It differs from the European & (Alcdo) major in being broader and more 

 expanded. 



r, „.. Idmonea atlantica JonxsT. [fide Sjhtt.) 



lamonea pruinosa Stimps. J """"+•) 



fathoms ient ° n thG bank ' hl the StraItS ° f Bdle ISIG - SqUare Islandj at a de P th 0f thirt ^ 



Hippothoa rugosa Stimps. Hippothoa catenularia Jameson (fide Sm.tt.) 



This species was found in abundance. 

 H. divarica,a Lamx ? Hippothoa borealis D'Okb. 



Found in abundance in the Straits of Belle Isle and Cateau Harbor. 



Hippothoa expansa Dawson. 



Frequent in the Straits of Belle Isle. I have also dredged it at Mount Desert, Maine 

 in fifteen fathoms. ' ' 



Lepralia annulata O. Fabr. 



A group of three cells, with two spines on each side of the distal margin, occurred in 

 the Straits of Belle Isle ; also in Cateau Harbor, Long Island, in fifteen fathoms. 



T . . -,.. Lepralia ciliata Johnst. 



L. crasstspina Stimps. 



This was one of the most abundant species, and occurs on the whole coast in deep water. 



Lepralia n. sp. 



Allied to L. trispinosa Johnst. ; very abundant. It is also abundant in Maine, as far south 

 as Portland. According to Mr. Smitt, this is not the European species, with which it has 

 been confounded in our list in the Canadian Naturalist. 



Lepralia pertusa Thomps. 



_ I cannot distinguish my specimens by any permanent characters from the British spe- 

 cies It is oval or broad oval, somewhat flattened or convex, punctured somewhat coarsely 

 with ridges separating the cells, which are arranged in no special order. Aperture round 

 truncate behind, or with a broad shallow sinus. The ovi-capsules globose, sub-ruo-ose sub' 

 punctate, much as in the British specimens. Found growing in purple patches. Length 

 tjV of an inch, half as broad as long. ° 



What I take to be a second and larger form of this species has the cells laro-e oblono- 

 oval, convex, being closely connected with the ones before and behind in radiating lines' 

 The surface has coarse emarginated punctures. In old specimens the punctures "are so 

 large that the surface is often but a net-work enclosing them. Apertures round slightly 

 raised, with a deep narrow sinus, at the entrance of which are two denticles, one on "each 

 side, which often become obsolete. In some cells the surface is perfectly smooth, and only 

 the marginal punctures are present. It is much larger than the preceding form being X 

 of an inch long, and arranged in more regular rows, and preserves better its oblono- o°val 

 convex form. The ovi-capsules are emarginato-punctate, and proportionally smaller and 



