146 Transactions of the Canadian Institute. [vol. ix 



Dendrodoa {Styelopsis) carnea (Agassiz)? 



Many specimens were obtained at low tide near the station and by 

 the dredge at nearly every point, but never in large numbers. I have 

 identified this with the Ascidia carnea of Agassiz with some hesitation. 

 Hartmeyer, after examining specimens of this genus from Casco Bay, 

 Maine, has considered Agassiz' species to be synonymous with D. ag- 

 gregata (Rathke). I have not been able to find in my material any speci- 

 mens that would correspond with Hartmeyer's description of the latter 

 species. They are all more nearly related to D. (Styelopsis) grossidaria 

 (Beneden). They differ from it in having a very small number of lon- 

 gitudinal bars. This form shows, in fact, a much greater reduction in the 

 number of bars than any other member of the genus. In nearly every 

 case the formula is, 



Right side, o (4) o (i) o (i) o (i) o. 

 Left side, o (i) o (i) o (i) o (i) o. 

 In one specimen the formula for the left side is 



o (2) O (l) O (l) O (l) o. 

 In another specimen, which may belong to another species, the 

 formula is — 



Right side, o (4) i (3) o (2) 0(1)0. 

 Left side, o (2) i (2) i (2) o (2) o. 

 This specimen differs from other individuals of the same size in 

 having an immature gonad and no eggs in the brood-chamber. 



The shape varies greatly — from scale-like to elongated oval, occa- 

 sionally attached by a small base. Shallow-water specimens are a bright 

 red. Those from deeper water are paler. As in Cnemidocarpa joannce, 

 the test in the living animal is transparent and the pigment is confined 

 to the 'mantle.' 



In a specimen 8 mm. in diameter there are 35 oral tentacles and 34 

 small tapering atrial tentacles. From 16 to 25 stigmata in each mesh. 



The single gonad is similar to that of D. grossidaria, the ovary 

 forming the inner part and the testicular lobes a layer on the outer side. 

 There are several vasa deferentia. The eggs are retained in a posterior 

 brood-chamber into which the oviduct opens. There is a distinct py- 

 loric caecum. The anus is two-lipped, its margin indistinctly lobed. 



Pandocia fibrosa (Stimpson) . 



Syn. Glandula fibrosa Stimpson, Proc. Bost. N.H., vol. IV, p. 230. 



Specimens agreeing with Stimpson's description and obtained from 

 the same locality as his specimens (the Hake Bay, off Grand Manan), 

 prove to be closely related to the Cynthia comata of Alder. According to 

 Hartmeyer, Pandocia conchilega Fleming the type of Fleming's genus 

 Pandocia, is the same as Cynthia comata. Heller has specified Glandula 



