1901.] NATUEAL SCIENCES OF PHILADELPHIA. 169 



ECHINODERMS COLLECTED OFF THE WEST COAST OF GREENLAND BY 

 THE PRINCETON ARCTIC EXPEDITION OF 1899. 



BY WALTER M. RANKIN. 



The following Echinoderms were collected by the Princeton 

 Arctic Expedition of 1899. 



In compiling the list I have eudeavored to give, in addition to 

 the identification of the species, some notes on the specimens — 

 their number, locality and peculiarities, together with a tabulation 

 of the distribution of the species in area and depth. 



I have not attempted to give a complete synonomy of the species, 

 but merely to quote the original author and, ordinarily, the refer- 

 ence where a more complete description or figure of the species may 

 be found. 



HOLOTHURIOIDE A . 



1. Cucumaria frondosa (Gunn.). 



Holothuria frondosa Gunnerus, Abhand. der Kgl. Schwed. Akad. der 



Wissenschaften, p. 115, PL IV, figs. 1, 2, 1767. 

 Cucumaria frondosa Forbes, History of British Starfishes, p. 209, 

 1841. 



Station 49. Olriks Bay, upper narrows, 15-20 fathoms. 1 spec- 

 imen. 



A single small specimen, 47 mm. long, 34 mm. in diameter as 

 contracted in alcohol. One tentacle, the ventral, is dark colored; 

 the others light. 



Distribution. — Florida reefs (dredged), Massachusetts to Labra- 

 dor, Baffin's Bay (Nares Ex.), Assistance Bay (Penny's voyage), 

 Iceland, North Cape, Spitzbergen, Kara Sea, north coast of Alaska. 

 " The form discovered by Ayres at San Francisco may perhaps 

 be C. ealifornicq, a closely alhed species " (Ludwig). 



Ludwig, in Fauna Arctica, Bd. 1, pp. 142, 143 (1900), gives 

 the distribution as a two-thirds circurapolar, the species being still 

 unrepresented in the north Asian region, from 70° E. L. to 170° 

 AV. L. North and south its extreme ])oint3 of distril)utiou are. 



