84 THE APODOTJS HOLOTHURIANS 



cles, and the small number (3) of polian vessels are notable characters, but 

 it is by no means improbable that this species will prove to be the young of 

 some other member of the genus, in spite of the fact that in Semper 's specimen 

 the gonads were "completely developed." The tentacles were very slender, 

 with 20 digits, and even in alcohol were two-fifths of the body length. 



SYNAPTULA PSABA. 



Synapta psara Sluiter, 1888, p. 219. 

 Chondroclcea psara Ostergren, 1898&. 



LENGTH. 400-500 mm. 



COLOR. Clear or dark gray, with irregular scattered darker patches, and 

 more or less clearly sprinkled with white dots, due to the calcareous deposits. 



DISTRIBUTION. Reported from the Bay of Batavia, Java (Sluiter), and 

 Saleyer, D. E. I. (Sluiter). Apparently entirely East Indian. 



REMARKS. This species appears to be well characterized by its color and 

 the peculiar miliary granules. Sluiter ( '88) says that it has in life the 10 rows 

 of prominent verrucas characteristic of the large Synaptas, and is in its general 

 appearance very similar to 0. grisea and serpentina. Like those species, it 

 occurs about the reefs. 



SYNAPTULA RECTA. 



Synapta recta Semper, 1868, p. 14. Calcareous particles, pi. iv, figs. 2-3. 

 Synapta striata Sluiter, 1888, p. 216. Anchor and plate, pi. n, figs. 39-40. 

 Chondroclcea recta Ostergren, 1898&. 

 Chondroclcea striata Ostergren, 18986. 

 Chondroclcea albopunctata Sluiter, 1901, p. 127. 

 Chondroclcea striata var. incurvata Vaney, 1905. 



LENGTH. 100-240 mm. 



COLOR. Apparently very variable; clear grayish yellow, variegated with 

 a network of dark brown or purple lines (Sluiter), or with alternate longi- 

 tudinal bands of dark and light gray (Bedford), or dark violet finely reticu- 

 lated with yellowish white (Semper), or striped lilac on a white ground (Pear- 

 son) ; more or less speckled with white, due to the calcareous deposits. 



DISTRIBUTION. Reported from Bohol, Philippines (Semper) ; Owen Island, 

 Mergui Archipelago (Bell) ; Dutch East Indies (Koehler, Sluiter) ; China 

 Strait, New Guinea (Bedford) ; near east end of Timor (Sluiter) ; Batavia, 

 Java (Sluiter); Saleyer (Sluiter); Dutch East Indies (?) (Ludwig) ; Ceylon 

 (Pearson), and Gulf of Aden (Vaney). Apparently an East Indian species, 

 extending southward to New Guinea and westward to the coast of Africa. 



REMARKS. Although Semper lays much stress on the fact that in his type 

 specimen the alimentary canal was straight (that is, without the customary 

 loop), I quite agree with Ostergren ( :05) that this is purely an individual 



