170 THE APODOUS HOLOTHURIANS 



MOLPADIA ELONGATA. 



Trochostoma elongatum Koehler and Vaney, 1905, p. 92 ; pi. i, fig. 5. Calcareous 

 particles, pi. xiv, figs. 1-3. 



LENGTH. 49 mm., of which the tail is more than half; the diameter of the 

 body is only 8 mm. 



COLOE. Grayish. 



DISTRIBUTION/ Reported only from the Gulf of Bengal, 1,660 m. (Koehler 

 and Vaney). 



REMARKS. In the remarkable development of the tail, this species ap- 

 proaches Caudina, but the calcareous deposits are quite like Molpadia. Only 

 one specimen is known; it is said to show only 10 tentacles, but apparently no 

 dissection was made to determine the actual number present. Of course, if 

 there are only 10, the species does not belong in Molpadia, and it becomes an 

 interesting question whether it is nearly allied to Ceraplectana. 



MOLPADIA GRANULATA. 

 PLATE X, FIGS. 20-21. 



Trochostoma granulatum Ludwig, 1894, p. 158. Calcareous particles, pi. xv, figs. 7-9, 

 and pi. xvi, figs. 1-6. 



LENGTH. 75-110 mm., of which the tail is about one-seventh. 



COLOR. Dusky yellowish or yellowish gray to brownish yellow; sometimes 

 very dark at the ends; skin thin, translucent, and rough. 



DISTRIBUTION. Reported from three "Albatross" stations off coast of Cen- 

 tral America, 2,848-4,017 m. (Ludwig) ; near Amboina, 798 m. (Sluiter), and 

 near Ceylon, 3,443-3,585 m. (Koehler and Vaney). Apparently distributed 

 in the deep parts of the tropical Indian and Pacific oceans. 



REMARKS. Although only a few specimens of this species are known, they 

 come from such widely separated localities and show such diversity in size 

 (26-110 mm.) that it is probably safe to say that granulata does not have 

 anchors and rosettes at any age. Koehler and Vaney consider this species very 

 near andamanensis Walsh, but the differences appear to be more striking than 

 the resemblances. 



MOLPADIA DISPAB. 

 PLATE X, FIG. 22. 

 Ankyroderma dispar Sluiter, 1901, p. 122. Calcareous particles, pi. x, fig. 6. 



LENGTH. 30 mm., of which the tail is nearly one-third. 



COLOR. Not given; skin thin and rough. 



DISTRIBUTION. Reported only from near Celebes, 462 m. (Sluiter). 



