150 AMERICAN HYDROIDS. 



I'l.ATK XXXI. 



FKI. 1. nifilinxlii pulclirrt Nutting. Two hvdnilhec:r (greatly enlarged). 



2. JHjiliiixiii juilrlirii. Part of colony (enlarged). 



3. DijiliuKin jiiilr/n-n. Part of branch (enlarged). 



4. Dijilnixiii iHiiiriiiiiiiiii Nutting. Part of branch with male gonangia (enlarged). 



5. Diphasia paarinanni. Female gonangium (enlarged). 



(>. filjiJiiixin jHiiii-niinnii. Kml of hydrotheca, showing opcrculum (much enlarged). 



7. Di/iliiixin iiiimiiji (Nutting). Distal end of branch, with gonangia (enlarged). 



8. Dijiliaxiu Hxcriitli. Four hydrothec;e (greatly enlarged). 

 II. lHjiliiixin l.-inniiili. (.ionangium (greatly enlarged). 



PLATE XXXII. 



FIG. 1. AbieHnarianbirlinn (Linn.Tns). Part of colony (enlarged). 



_'. Abii-iiiiin-iii iiliii-tiiin. Part of a branch nmich less magnified). 



.'!. Aliifliiniriii iiliiiiiiin. Two hydrothecic, showing operculum (mucli enlarged). 



4. Aliiiiiiniriii i-in-iiiliilix (Clark). Part of colony, showing hranching (enlarged). 



5. Aliii-liiiiii-in rni-iiibilix. Four hydrotheca^ (much i-ulargcil ). 

 I). Aliii'liiini'iii I'lirinlii/ix. Group Of gonangia (enlarged). 



7. Alili-iiiinrin mri'ilii/is. Gonangium (greatly enlarged). 



PLATE XXXIII. 



FIG. 1. Abietinaria inconstant (Clark). Part of colony (enlarged). 



2. Aliii'liiini-lii iiii-iiiixlniix. Part of branch (enlarged). 



3. Aliii'liiiin-iii i-ni'i (Nutting). Part of branch, with gonangia (enlarged). 



4. . I liii'liniifin nii-i. Single hydrotbeca, showing sinuation of margin (enlarged). 

 ">. Aliiiiiiiiirin fin-!. Top-shaped gonangium (enlarged). 



6. Alii,ihiiir/ii li-iix/.-i (Torrey). Part of colony, showing branching (enlarged). 



7. Aliii-liiiin-in trtixki. Two hydrotliecic (greatly enlarged). 



8. II. Abit'lli, uriii Iniski. Kinls of hydrother;e, showing opercula (greatly enlarged). 



10. Abii'liiiiiriii li-itsH. Branch, with gonangium (enlarged). 



11. Aliiclhinrin triixki. Three hydrotbec;e from another colony (greatly enlargi'd). 



PLATE XXXIV. 



FIG. 1. Aliiiiiiiiirin iHirnlij (Ellis and Solauder). Part of lirancli (much enlarged). 

 ~2. Abii-tiniiriii iniijiliiii-d Nutting. Part of branch (enlarged). 



3. Aliii'liiiin-i/t iiiiijilini-ii. Distal part of branch (enlarged). 



1. . l/i// tnmriii iiiiijiltnrii. Part of branch, with gonangium (enlarged). 



5. Aliiiiiinii'iii iiiii/iiiini (Trask). Part of branch, with very slender h yd rotheese (enlarged). 

 ('. Aliii-liiiiii'in niii/iiiiiii. 1'art of branch with gonangia (enlarged I. 



7. Abiiiiiiin-iii ungiiinii. Single gonangium (enlarged). 



PLATE XXXV. 



FIG. 1. Aliii-liniifin f/rr/rilis Nutting. Part of colony with gonangium (enlarged). 



2. Aliiiiiiiiirin f/nicilix. Four hydrotbeca^ (greatly enlarged). 



!!. Abietinaria compressa (Mereschkowsky) . Part of branch (enlarged). (After Mereschkowsky.) 



4. Abii/ii/iirin niiiijin-xxii. Single hydrothecae (much enlarged). (After Mereschkowaky. ) 



5. Aliii'liiini-iii ii/i.i'in/'li'i-i Nutting. Part of stem and branches (enlarged). 

 <>. Alii/iiiKii'in iil,.iiuli-ri. Part of branch and gonangium (enlarged). 



7. Aliiiliiiiifiii iili'.iiniiln-i. ( ionangium, showing meridional lines (enlarged). 

 s. Abietinaria alexanderi. <ionangium (much enlarged). 



PLATE XXXVI. 



Fin. 1. Aliii'/iiKiriii i/ri'i in'i t Murray). Part of branch (enlarged}. 



2. Aliii-linin-iii ijri't'ini. Four hydrotbeca/ (enlarged). 



3. A/iiitiiiiii-in iji-irin-i. Pair of hydn>thec;e with toothed margins (much enlarged). 



4. A/iitliitm-iii i/i-iini'i. Pair of hydrothei-e with even margins (much enlarged). 



5. Aliii-Hiuiriit //finii'i. Side view of hydrothecre (enlarged ). 



6. Alii' limn-in (/''<"'". Side view of hydrotheeje (much enlarged). 



7. 8. Aliiitiiiiii-ln i/i-i-i-ni'i. Gonangia (enlarged). 



'.i. .\liiiiiiiin-iii rnxlnlii (Nutting). Part of branch (enlarged). 

 10. Aliii-lii/iiriii i-iixliiln. Part of main stem, showing branch origins (enlarged). 



