lo8 BULIyETIN OF THE BUREAU OP FISHERIES. 



Cribrilina. 



C. punctata: Common in Vineyard Sound and outer waters, on stones and shells. 

 C. annulata: Only in outer, colder waters. 

 Schizoporella. 



S. unicornis: Everywhere, forming massive colonies; less frequent in outside waters. 



S. biaperta: Throughout our waters, forming flat colonies on stones and shells, or (more frequently) 



forming fanlike expansions on algse, etc. 

 S. auriculata: Only in outside waters. 

 S. sinuosa: Only in outside waters. 

 Hippothoa. 



H. hyalina: Of general distribution on algse, shells, stones, etc.; best developed on stems of algae 



and hydroids, where it forms nodular crusts. 

 H. divaricata: Locally, not at all common and found only in the outer waters, though not else- 

 where restricted by temperattu-e. 

 Lepralia. 



L. americana: Throughout our waters on stones and shells, especially in deeper waters. 



L. pallasiana: On stones, shells, piles, and eel grass; of general occurrence, but more frequent in 



shallow waters. 

 L. pertusa: Of general distribution; most common on shells and pebbles. 

 Mucronella. 



M. peachii: Occasional in Sound and in outside waters, forming flat crusts on stones and shells. 

 M. pavonella: In outside waters only, forming flat colonies upon stones and shells, or rising into fan- 

 like expansions on stems of hydroids, etc. 

 Smittia. 



S. trispinosa nitida: Of very general occiirrence, growing upon all sorts of objects, and forming 



massive nodular crusts on stones and shells. 

 S. porifera: In outer waters, on stones and shells; smaller colonies sometimes taken in inner waters. 

 Cellepora. 



C. americana: Of general distribution on stems of hydroids or algae, forming nodules or irregular 



masses. 

 C. canaliculata: In outside waters, forming rounded, pisiform colonies on stems of hydroids, etc. 

 Alcyonidium. 



A. verrilli: Western end of Vineyard Sound, erect and branching. 



A. parasiticum: In outside waters, incrusting stems and stones; argillaceous matter combined in 

 zoarium. 



A. mytili: In various situations in inside waters, incrusting, not argillaceous. 

 Bowerbankia. 



B. gracilis and its variety caudata: Creeping over stems of other organisms, or upon piles; occurring 



together. 

 Hippuraria. 



H. armata: Of general occurrence; creeping upon stems, etc., or erect. 

 H. elongata; Commensal in branchial chamber or on carapace of Crustacea. 



The following list comprises the Bryozoa collected by us in the course of the Sur\'ey 

 dredging. A considerable number of these species were not taken, however, at any of the 

 regular (numbered) stations, and a good many have been recorded only from outlying 

 points, such as Crab Ledge or the shoals to the east of Nantucket. Those species which 

 were taken at lO or more of the stations in Vineyard Sound and Buzzards Bay are, as 

 usual, designated by an asterisk. 



Pedicellina cemua. 

 Barentsia major. 

 Barentsia discreta. 

 *Crisia ebumea (chart 27). 

 Crisia cribraria. 



*Tubulipora liliacea (chart 28). 

 Tubulipora atlantica. 

 Tubulipora flabellaris. 

 Stomatopora diastoporoides. 

 Lichenopora vemicaria. 



