MARINE INVERTEBRATA OF GRAND MANAN. 25 



M. CANCELLATA, St. Dredged alive in twenty-five f., shelly, off Duck Island. 

 M. DECUSSATA, St. Specimens here are very small and variable. 



TECTIBRANCHIATA. 



Bulla hiemalis, Couth. In forty f , mud, off Long Island. 

 B. TiuTicEA, Couth. Common. 



B. PERTENUis, Migh. In ten f, sand, off Cheney's Head. 



B. DEBiLis, Gould. Taken alive in six f , coarse sand, off Duck Island boat moor- 

 ings. 



Philine lineolata, St. Common in the shallows among the lower islands. 



Besides the species above catalogued, a few probably new species of univalves 

 occurred, which have not yet been determined for want of opportunity of compa- 

 rison with European examples of the same genera. 



NUDIBRANCHIATA. 



Canthopsis Harvardiensis, Agass., Best. Proc, iv. 191 (no dcscr.). A good 

 colored drawing of this remarkable mollusk is in Professor Agassiz's possession. It 

 is very common in sheltered muddy bays in this region, feeding on filamentous 

 chlorosperms about low-water mark. 



EoLis farinacea, Gould, MSS. This fine species approaches E. angnlata, A. 

 et H., Brit. Nudib., PI. 23, but is much larger, being sometimes an inch and a 

 half in length. Its color is also different, being made up of numerous flake-white 

 blotclies and dots on a dark fawn ground. The papilla3 are short and very nume- 

 rous, so closely arranged that their grouping into rows can scarce be distinguished. 

 It is very numerous, spawning on the rocks above low-water mark in August. 



EoLis stellata, St., n. s. Body small, slender, elongated, pale white, pellucid ; 

 head with a flake-white patch above in front of the oral tentacles. Dorsal tentacles 

 long, but shorter than the orals, slender, wn-inkled transversely, especially in con- 

 traction. They arise very near together, and bear the prominent black eyes at 

 their bases behind. Oral tentacles very long and slender, smooth, and gracefully 

 curved. Papillae or branchia? rather few in lumiber, long and slender, arranged in 

 about five clusters on each side ; those in the second and third clusters being 

 longest. Foot narrow, pointed behind, and strongly auricled in front. Colors : 

 papillfB bright crimson, tipped with a ring of opaque white; tentacles pale pink 

 near their bases, with tlicir anterior halves wliitc. Length, two-fifths of an inch. 

 This species resembles somewhat E. rufihrancJiialis, .Tohnst., but its foot is not so 

 long, nor its dorsal tentacles so tapering ; and its papillae arc fewer and longer. It 

 is found under stones at low-water mark, and wdien disturbed rolls itself up so 

 that its branchias project in all directions like the rays of a star. 



E. purpurea, St., n. s. Body large, full, robust; tentacles rather short, thick, 

 smooth ; the dorsal ones with the eyes fiir behind their. bases. Pajiilla) large, flat- 

 tened, crowded, arranged in five or six clusters on each side, leaving the middle 



