158 Bulletin, Tanderbilt Marine Museum, Vol. IV 



B, which has the outer surface always roughened witli little, conical, 

 close-set points. The most abundant of these deposits have an oval 

 form, with three pairs of holes in symmetrical series. Some of these 

 deposits are more elongate-oval, as in figure C, and have four to six 

 pairs of holes in successive series. These may have considerable varia- 

 tion or irregularity in their shape and the holes may be quite small, 

 or even lacking, especially in the deposits of the ventral surface. The 

 deposits of the ventral side are the most elongated and the number of 

 holes in each may be as many as twelve to sixteen, as in figure D. 

 The deposits of the dorsal papillae are turriform tables and elongated 

 bars, the latter often dilated in the median region as in figure F. 

 There are also more elongated ones, with seven or eight pairs of holes, 

 on the dorsal papillae, but these deposits are never as large as those 

 on the ventral surface (fig. E). Besides these typical forms there 

 are many intermediate forms between the tables and bars. The ventral 

 pedicels have tables with spires, and elongated perforated buttons, also 

 bars. The tentacles have straight or slightly arched bars of a hyalin 

 tissue with the margins furnished with short, little spikes. There are 

 also much larger bars whose surface is so covered with short, closed 

 spines or spikes, that the bars are not transparent. These are elongated, 

 as in figure G, with no perforations in the middle region, but with 

 the ends perforated by several little pore-like holes. There are no 

 Cuvierian organs present in this species. 



References : Holothuria tubulosa Gmelin, Syst. Nat. Ed. 13, p. 3138, 

 1788 (with early synonymy). — Selenka, Emil, Zeitschr. f. 

 wiss. Zool., Bd. XVII, p. 323, pi. 18, figs. 42, 43, 1867.— Semper, 

 Reisen in den Philippinen, Bd. I, Holothurien, p. 279, 1867-68 

 (with extensive synonymy). — Heller, C, K. k. Zoolog. botan. 

 Ges. Wien, Bd. XVIII, p. 72, 1868.— von Marenzeller, Verhandl. 

 K. k. Zoolog. botan. Ges. Wien, Bd. XXIV, p. 314, 1874.— Theel, 

 Rept. Voy. ''Challenger," Zool., vol. XIV, p. 229, 1886.— 

 Koehler, R., Faune de France, p. 174, fig. 130, 1921 ; Echin. des 

 Mers d 'Europe, vol. II, p. 215, 1924. — Mortensen, Th., Handbk. 

 Echinod. British Isles, p. 393, 1927. 



Mentula marina Janus Plancus, De Conchis minus notis Romae, 

 p. 108, app. tab. VIII, figs. A, B, 1760. 



Die Zitterblase, Bohadsch, Beschrb. einig. minderbek. Seeth. Dresden, 

 p. 67, taf. VI, VII, figs. 1-5, 1776. 



Fistularia tubulosa Lamouroux, Encyclop. method. Paris, p. 400, pi. 

 86, fig. 12, 1824. (Copy from Bohadsch.). 



