294 BIOLOGICAL SURVEY OF 



ESCHAROIDES ROSACEA (Blisk) 

 POSTERULA SARSI (Smitt) 



Stomachetosella producta (Packard) 



HiPPODIPLOSIA RETICULATOPUNCTATA (Hincks) 



HiPPODiPLOsiA SMiTTi (Kirchenpauer ) 



HiPPOPONELLA HIPPOPUS ( SlTlitt ) 

 SmITTINA BELLA (Busk) 



MucRONELLA ABYSsicoLA (Normaii) 



MUCRONELLA SPINULIFERA Hincks 



Khamphostomella radiatula (Hincks) 

 Rhamphostomella scabra (Fabriciiis) 

 PoRELLA SKENEi (Ellis and Solander) 

 Porella plana Hincks 

 Alcyonidium mamillatum Alder 



In Osburn's list of about eighty species from the AVoods 

 Hole Region (1912) there are twenty-three species not found 

 in the present list. These are chiefly species of more south- 

 ern distribution, which find Cape Cod their northern limit. 

 A few of them, however, occur farther north and may be 

 looked for in the future about Mt. Desert Island. 



Four species are described as new. One of these, Oncou- 

 soecia canadensis n.sp., has been confused with 0. {Stomafo- 

 pora) diast op rides Norman by Hincks, Norman, and Whit- 

 eaves, and Canadian records for diast op orides, at least in 

 part, refer to it. Another, Diaperoecia harmeri n.sp., has 

 been listed as Entalophora clavata Busk by Cornish, without 

 much question. A third, Smittina reduplicata n.sp., was con- 

 fused with S. {Porella) concinna Busk by Osburn and prob- 

 ably by other writers on New England and Canadian Bryo- 

 zoa. The fourth, Smittina novanglia n.sp., has been 

 separated from S. {Porella) bella Busk. 



The illustrations for this paper were, for the most part, 

 made by Dr. S. J. Conrad, and were completed before the 

 collection came into my hands for study. Miss Mary D. 

 Rogick, my assistant, has contributed some additional draw- 

 ings in ink, especially of details of structure. Three others, 

 done by Mr. Howard J. Shannon, for the Bryozoa of Woods 

 Hole, are repeated here. 



