706 KEPORT OF COMMISSIONER OF FISH AND FISUEKIKS. 



tlio miscM'oscopo, have tlio snrfaco eovorod with i)rojootin,q,- points. Snr- 

 iat'O <it' the crusts covovod with small, int\i;iilar, scattoiotl inominoiu'os, 

 ill which the braiu'hial oritiees are situated. CMoacal oriliees lew and 

 distantly scattered. Systems irrejiular, the zoiiids scattered, but often 

 airaiiged in rather indistinct concentric groups around the doacal open- 

 ings, and connected with them by doai-al ducts, wliicli are variously 

 bran died, often showing through the integument as dark dendritic lines, 

 converging toward the doacal oritices from dillerent directions. 



(\)lor white, the zoiiids light yellowish. 



The colonies often become L'OO""" to ;>()()„„u across; thickness seldom 

 more than 2.5'"'", commonly about l.lio '"'" ; zooids .5'"'" to .75""" long ; 

 diameter .25""" to .30""". 



Long Island Sound to Labrador. Thimble Islatuls, near New Ilaven, 

 4 tot) fathoms, rocky; ottStoniugton, 4 fathoms, rocky; common in Vine- 

 yard Sound, 8 to 15 fathoms ; abundant in Casco r>ay, (> to 40 fathoms; 

 abundant in the l>ay of Fundy, low-water to SO fathoms. ]>anks of 

 >Jewfoundland (T. M. Cotlin). Mingan Islands, 10 fathoms (A. E. V.). 

 Saint George's l>ank (S. I. Smith). 



Leptoclinum luteolum Verrill. (p. 403.) 



Aiuoiioau Jonr. Science, loc. cit., p. 44(5, 187*i. 



This species forms thin, coriaceous crusts, like the preceding, tilled in 

 the same way with similar spherical corpuscles. Tlie branchial oritices 

 open at the summits of low verruca^. The doacal oritices are small, 

 ■with four to six lobes, and distantly scattered. Color deep salmon, or 

 somewhat rosy. 



The crusts are of all sizes up to 300""" or more in diameter, and are 

 usually somewhat thicker than in the preceding species, with larger and 

 darker colored zooids. 



Connecticut to l>ay of Fundy ; ott" Stonington, Connecticut, 4 fathoms, 

 rocky; Vineyard Sound, (> to 14 fathoms, common ; Casco Hay, 10 to 40 

 fathoms, common; Bay of Fundy, low-water to 80 lathoms, common. 



TiENIOBRANCIIIA. 



Salpa Caboti Desor. Tlate XXXIII, figs. 254, 255. (p. 445.) 



Proc. Boston Soc. Nut. History, vol. iii, p. 75, 1848 (not doscribtHl) ; A. Agassiz, 

 op. cit., vol. xi, p. 17. tins. 1 to ;">, IHOt?; Binnoy, in Gould, Invert., od. ii, p. l>, 

 lif^s. 3r>0 to 354, 1870 (description and iigures copied from A. Agassiz). 



In the typical variety, as described by Mr. Agassiz, the color is pale 

 ]>iiikorrosy; the nucleus deep chestnut. Long Island Sound to Saint 

 George's Bank. Common in Buzzard's Bay and Vineyard Sound. Oft' 

 Saint George's Bank (S. I. Smith). 



Var. v!/<x>iea. (p. 440.) 



Nucleus and the borders of the mantle are bright Prussian-blue ;. sur- 

 foce of the latter delicately reticulated with tine blue lines. 



Vineyard Sound, especially oft' Gay Ileiul, in September. 



