Ko. 1555. jrAWAIIAN HOLOTnURIANS—FLSIIER. 733 



rods are fairly common. All the rods are rather evenly scattered and 

 are found in the tentacles, beino- there different in shape and more 

 elaborately branched at the tips and subterminally. (Plate LXXXII, 

 figs. 3(^, c. ) These rods are also larger, measuring commonly from 0. 048 

 to (».076 mm. . The grains (fig. 'Sa) are very numerous along the 

 longitudinal muscles and are O.Ult* to 0.03 mm. in length. 



The species to which Juiwalleiisis shows nearest relationship are 

 rigida Semper, Jthtnita Sluiter, and amlolnensls Ludwig. From 

 rigida the species difiers in having constantly 8 to 10 digits to the 

 tentacles instead of 13; in having less numerous wheel papilla?, espe- 

 cially on the ventral interamlndacra; in possessing much heavier 

 spokes to the wheels, and pro])ably also in the presence of numerous 

 oval and dumbbell grains along longitudinal muscles. The calcareous 

 ring is nearly identical with that of llherata. From liherata^ hawaii- 

 cnsis differs in distribution of papilh^, in the presence of branched 

 rods in integument, in the greater number of Polian vesicles. Ainbo- 

 inensis is very close to rigida, according to Ludwig's short description, 

 and differs from JimraUeni<lH in the same respects as rigida. It is not 

 possible to tell from any of the descriptions of the alwve forms 

 whether the much branched rods in the tentacles of liajwallensls are 

 peculiar. If they are, tlie}^ will afford an additional character of 

 importance. 



These little animals were found by the writer in digging for Enter- 

 opneusta, Pfychodera laymnlca Spengel being rather common in the 

 same habitat. The broad, flat reef which extends from Honolulu 

 Harbor toward Waikiki is uncovered by the receding tide for a con- 

 siderable width. Many little pools are left in the coral, and it is in 

 the sand}' bottoms of these that Chirldota liatnallrnxl.s is so conunon 

 a few inches l)eneath the surface of the sand. The alimentary canal is 

 always gorged with coral sand. C. llherata Sluiter lives on live or 

 dead coral over which it creeps. 



CHIRIDOTA UNISERIALIS, new species. 

 Plate LXXX, iig. 4; Plate LXXX, tigs. 5, ha-c. 



Tentacles 12; digits 10 to ll^, the 2 terminal larger than the rest, the 

 subterminal nearly as large, and the rest graduated in size, the proxi- 

 mal digits being very small. Middorsal interaml>ulacrLmi only with 

 "wheel papilla?," which are scattered very irregularly in a single 

 lineal series the whole length of body, or are confined mostly to pos- 

 terior half. Papilla' are of conspicuous size and 9 to 50 in number. Sur- 

 face of bo ./, as in preceding species, is slightly roughened by small, 

 low, ffattish, wart-like eminences, which are apparent only when ani- 

 mal is contracted. Deposits: Wheels larger than those of hawaiiensis^ 

 and sniootii straight or curved rods slightly swollen at middle and 

 with two oi Jiree blunt incipient spines at tips. In muscle bands are 



