Verrill.] 354 



The genus Lepidopsolus (Bronn, Thier. Reichs, ii, p. 404) proposed 

 for P. squamatus (Miill. sp.) is said to liave the suckers scattered be- 

 neath, and other characters very different from the present group. 



Lophothuria Fabricii Yerrill. 



Holothurkt squamata Fabr. Fauna Groen; Gould, (not of Miiller). 

 Cuvieria Fabricii Dub. and Kor. ; Stimpson, Inv. p. 16. P solus 

 Fabricii Liitken, Gron. Ech. p. 13. Cuvieria squamata A. and E. C. 

 Agassiz, op. cit. p. 98. figs. 127-129 (original). Psolus phantapus 

 Clark, Mind in Nature, p. 192, fig. 117 (original, a good figure). 



Massachusetts Bay to Greenland. Common in two to eight fathoms 

 in a few localities at Grand Menan, adhering firmly to rocks. Occa- 

 sionally a specimen of large size is exposed at low-water of spring 

 tides. Young under stones at low-water, A. Agassiz. Rockland 

 Harbor, Me., in five fathoms, C. B. Fuller. Called "Sea-orange" by 

 American fishermen. 



Synapta tenuis Ayres. 



Sandy beaches of Massachusetts Bay at low-water, not uncommon. 



Chirodota Iseve Grube, (Fabr. sp.) 



Trochinus pallidus Ayres, op. cit. p. 243. Synapta coriacea Ag. 

 Proc. A. Acad. 1851, (no description). Chirodota Iceve Stimp., op. 

 cit. p. 17 ; Packard, Can. Nat. Dec, 1863. 



Eastport, Me., and Grand Menan, under stones at low-water, com- 

 mon. Labrador in ten fathoms, sandy bottom. Dr. Packard ; Green- 

 land, Dr. Liitken. 



Caudina (Molpadia) arenata Stimp. op. cit. p. 17, 1853. 



CJdrodota arenaf a Gould, op. cit. p. 346, 1841; Ayres, op. cit. p. 

 143 ; Pourtales, Proc. Am. Ass. 1851, p. 13. Caudina arenata A. 

 and E. C. Agassiz, op. cit. p. 97, fig. 126 (original) ; Clark, op. cit. p. 

 187, figs, ll^to 116 (original). 



Sandy and muddy shores of Massachusetts Bay. Often throAvn on 

 Chelsea Beach, Mass., after storms. 



This genus is very closely allied to, if not identical with, Molpadia 

 Cuvier. (SeeM. borealis in Sars, Norges Ech. tab. 12 and 13). 



Doubtful Species. 



The following are, as yet, quite obscure, and are, perhaps, synon- 

 ymous with some of the preceding. 



Cucumaria fusiformis Desor, these Proc. iii, p. 67. South 

 Shoals, Mass., twenty-two fathoms. Chirodota oolitica Pourtales, 

 Proc. Am. Ass. 1851, p. 13. From fish-stomachs. 



