1913.] Clark, Echinoderms from Lower California. 227 



HOLOTHURIOIDEA. 



Leptosynapta inhserens. 



Holothuria inhaerens 0. F. MULLER, 1776. Zool. Dan. Prod., p. 232. 

 Leptosynapta inhcerens VERRILL, 1867. Trans. Conn. Acad., Vol. 1, p. 325. 



There are two S3 r naptids in the collection, which agree in all respects 

 with each other, and except for color and texture of the body wall, I cannot 

 distinguish them from L. inhaerens. But the body wall is soft and rather 

 thick and the color is nearly black. The texture of the body wall may be 

 the result of having been at first preserved in formalin, though there is no 

 other indication of that reagent, but for the color I am quite unable to 

 .account. Each specimen is about 40 mm. long; the anchors are .16 mm. 

 and the plates .14 mm. long in the posterior part of the body. Unfortu- 

 nately the locality of these specimens is quite uncertain; one was in a jar 

 with the specimens of Holothuria lubricn, which lacked a locality label; 

 while the other was in a vial with the label "Station 5684." Now since the 

 depth at station 5684 was 1760 fms., it is impossible to believe that this 

 characteristically littoral genus occurs at that place. The appearance of 

 the two specimens is such that I have little doubt both came from the same 

 littoral station where the Holothuria lubrica were taken. 



Protankyra abyssicola. 



Synapta abyssicola THEEL, 1886. "Challenger" Holoth.: Pt. II, p. 14. 

 Protankyra abyssicola OSTERGREN, 1898. Ofv. Kong. Vet. Ak. Forhandl., Vol. 

 55, p. 116. 



The specimens are all more or less fragmentary and in poor condition. 

 The largest one is about 90 mm. long and was probably 150 mm. in life. 

 The anchors have 2-7 teeth on each arm, so that the specimens cannot be 

 referred to P. pacifica. Further material is necessary to show whether 

 the latter species can be maintained. In the light of the present material, 

 it seems quite improbable. These specimens are strongly tinged with red, 

 due to a red pigment in the skin. In one specimen, this pigment was of a 

 blackish-brown color. 



Station 5673. Off Pt. San Tomas, west coast of Lower California, 

 1090 fms. 



Station 5684. Southwest from Magdalena Bay, west coast of Lower 

 California, 1760 fms. 



