NO. 3 deichmann: holothurioidea ; part i, dendrochirota 81 



Depth. — Not recorded for the type and paratypes. 



Specimens examined. — A single specimen from Vclero III Station 

 699-37, Angeles Channel, Gulf of California, 30 fms., March 18, 1937. 



Remarks. — The name chilensis has been re-established, since it is al- 

 most unbelievable that the species from China is identical with the 

 Chilean form. Ludwig evidently considered the 2 species as different and 

 then decided to unite them in spite of the differences which they ex- 

 hibited. It is not clear from his description whether he found any cross- 

 shaped bodies in the Chilean specimens (present in C. exigua from 

 China). The combination of characters, viz., simple ring and small ven- 

 tral tentacles and the unusually narrow supporting rods in the feet, is 

 such that it seems almost certain that the present species is identical with 

 the one described by Ludwig. Most of the plates found in the Velero 

 specimen are considerably more complex than indicated by Ludwig, but 

 simple 4-holed buttons are also present, and it is well known that the 

 spicules are often more or less reduced in this group. (The earlier 

 authors, often on general principle, avoided figuring the more complex 

 spicules, as study of certain holotypes has revealed, and figured only those 

 which could be easily reproduced.) 



The Velero III specimen measures 3 cm. in length, but is so strongly 

 retracted that it probably measured 10 cm. or more when expanded. Lud- 

 wig's types measured about the same, but it is not known whether they 

 were very strongly contracted or not. 



3. Gucumaria dubiosa Semper 

 Plate 11, Figs. 1-2 



Cucumaria dubiosa Semper, 1868, p. 238, pi. 39, fig. 19. — Lampert, 



1885, p. 151.— Theel, 1886, p. 111. 

 Cucumaria leonina Ludwig, 1898, p. 36. — Ekman 1925, p. 52, text fig- 

 ure 10. 

 Nee Cucumaria leonina Semper, 1868, p. 53, pi. 15, fig. 9. 



Diagnosis. — Medium-sized form, length up to 10 cm. Feet in 5 

 bands and numerous in the dorsal interambulacra. Tentacles bushy, of 

 unequal size. Color uniformly parchmentlike (in alcohol). Calcareous 

 ring simple, other features as in the typical forms. Spicules numerous, 

 oblong, knobbed plates, often with spinous handle- and 4-holed buttons. 



2 In very young specimens (1 cm. long) a number of almost circular plates 

 with a long narrow handle are found (see Ekman's text figure). Such plates with 

 handles have not been discovered in Cucumaria lubrica from the western coast 

 of North America. 



