275 



The common miliary granules (Fig. 53. 6) are small, perforate 

 plates. They are usually of a rather constant shape, but sometimes 

 they may be very varying (Fig. 53. 6). Among these plates there 

 are found many curved rods (Fig. 53. 7) and in the ambulacra there 

 are oval bodies (Fig. 53. 3). In the tentacle-base there are some 

 few, perforated plates, but the larger part of the deposits here, 

 as well as in the digits, are rather large, curved rods (Fig. 53. 4). 

 In the tissue around the anchors there are the "sehr eigentümliche 

 Stützstäbchen" observed by Sluiter (Fig, 53. 5). 



As to the identification of the specimens at hand I have no 

 doubt that they are the same species as the specimens described 

 by Sluiter ("Siboga" Holothurien. pag. 129, Pl. X fig. 13) and I do 

 not think it wrong to refer them to Ludwig's species. In the "Apod. 

 Holoth." Clark writes: "It is virtually certain that neither Lud- 

 wig nor Théel would have overlooked such calcareous bodies 

 (i. e. Sluiter's Stützstäbchen), so we are safe in assuming that 

 they were not present in the specimens from Banka. The question 

 naturally arises whether their presence in Sluiter's specimens 

 would not indicate an important specific difference." I do not think 

 so. The specimens at hand show that the number of the "Stütz- 

 stäbchen" may vary very much, and in some specimens they may 

 be nearly quite wanting, and though they may be present around 

 some of the anchors, they may be totally wanting around others. For 

 this reason both Ludwig and Théel may have made preparations 

 without including a single "Stützstäbchen" though such bodies do 

 occur in the examined specimen. Thus we have no reason for 

 regarding neither Sluiter's specimens nor those at hand as specific- 

 ally different from the Banka-specimens. 



Protankyra vamiuvna n. sp. 



The West-Indies. Ravn. 1 specimen. 



The specimen at hand is lacking the anterior end. It measures 

 9 cm in length and 1,5 cm in diameter. The intestine has a loop, 

 the anterior curve of which is present. 



The ciliated funnels are only found on the body-wall in the inter- 

 ambulacra and seem to be totally wanting on the mesenteries. They 

 are as in asymmetrica dichotomously branched (Fig. 54. 1) and the 



18* 



