162 THE APODOUS HOLOTHUBIANS 



specimens is noteworthy, but we know very little yet about the constancy of 

 color in the Molpadiidae, and what little we do know makes us skeptical of its 

 value for specific distinctions. The calcareous particles of all ages are fully 

 figured by Koehler and Vaney. 



MOLPADIA INTERMEDIA. 



PLATE XII, FIGS. 5-15. 



Trochosioma intermedium Ludwig, 1894, p. 161. Calcareous deposits, pi. xvi, figs. 

 7-21. 



LENGTH. 110-140 mm., the caudal appendage about 20-25 per cent of the 

 total length. 



COLOB. Gray or yellowish gray, more or less spotted, blotched and con- 

 cealed by the reddish-brown or reddish-violet color caused by the phosphatic de- 

 posits. 



DISTBIBUTION. Reported from Gulf of Panama and Gulf of California 

 (Ludwig) and numerous stations along the Pacific coast of North America 

 (Clark, antea). 



REMARKS. This is undoubtedly the common Molpadia of the North Pacific, 

 and while it is nearly related to oolitica, it is very readily distinguishable. It is 

 one of the species in which the young are provided with anchors and rosettes 

 (antea, pp. 18 and 33), and even large specimens often show the presence of 

 a few. 



MOLPADIA ANDAMANENSIS. 

 PLATE X, PIG. 15. 



Trochostoma antarcticum Lampert, 1889 (non Theel, 1886a). 



Trochosioma andamanense Walsh, 1891, p. 203. 



Trochostoma scabrum Sluiter, 1901, p. 119. Calcareous particles, pi. x, fig. 9. 



Trochostoma scabrum spinosa Sluiter, 1901, p. 119. Calcareous particles, pi. x, fig. 



10. 

 Trochostoma andamanense Koehler and Vaney, 1905, p. 90. Calcareous particles, 



pi. XIH, figs. 11-15. 



LENGTH. 90-150 mm., of which the caudal appendage is about 8-12 per 

 cent. 



COLOR. "Dirty flesh-color with closely placed deep chocolate spots, the 

 crown (tentacles) being a sort of raw-meat color" (Giles, in Walsh, loc. cit.). 

 "In spirit, the ground color has become greenish gray and the spots are more 

 or less blood-red. The tentacles are yellow and between each two there is, 

 near the base, a blue-black triangular mark" (Walsh, loc. cit.). Curiously 

 enough, Koehler and Vaney do not refer to the color, so that we do not know 

 whether the remarkable coloration of the tentacles and oral disc given by Walsh 

 is a constant feature or not. Sluiter describes the color very much as it occurs 



