158 CLASS IV. 



Oncinolabes BRANDT. Body covered all over with recurved 

 booklets. (Differs from Pentacta by defect of respiratory organs.) 



Thyone OKEN, Mulleria FLEM. (not JAEG.) Feet equal, nume- 

 rous, scattered through the whole body. Body cylindrical. 



a) Tentacles ramose, often unequal (Phylloporus GKUBE, Anaperus 

 TROSCH., Orcula TROSCH.) 



Sp. Thyone papillosa, Hoi. papillosa, Zool. dan. Tab. 108, fig. 5, FORB. Brit. 

 Starf. p. 233 ; in the North Sea, &c. 



6) Tentacles peltate (Sporadipus BRANDT). 

 Sp. Sporadipus Ualanensis BR. &c. 



Holothuria nob. (Species of genus Holothuria L.) Feet of two- 

 fold structure and figure, some cylindrical, dilated at the tip, 

 usually occurring in the abdomen only, others situated on the back, 

 not dilated at the tip, emerging from warts on the back. Body 

 cylindrical, or flattened in the abdomen. 



a) Tentacles peltate or umbellate usually 10 (Stichopus BR., Diploperi- 

 deris BR., Holothuria BR., Bohadschia JAEG., Mulleria JAEG., Trepang 

 JAEG.) 



Sp. Holothuria tubulosa, Fistularia tubulosa LAM.; Holothuria tremula GMEL., 

 Cuv., BOHADSCH de quibusd. Animal, marin. 1761, Tab. vi., TIEDEMANN 

 Anat. Tab. I., Cuv. R. Ani. ed. HI. Zoo'ph. PI. 20, fig. 3 ; one of the largest 

 of the species in the Mediterranean. Twenty tentacles, placed alternately 

 in two circles, surround the mouth. Holoth. argus, Bohadschia argus 

 JAEGER de Holoth. Tab. II. fig. i, on the coasts of Celebes and Timor. 

 Holoth. edulis, Trepang edulis JAEG., LESS. Cent. Zool. PL 46, fig. 2, 

 GUERIN Iconogr. Zooph. PI. 4, fig. 7 ; this species lives on the coral-reefs of 

 the Molucca, Philippine and Carolina islands, and is fished up in large 

 quantities with other species under the name of Trepang, to be dried and 

 smoked and prepared with condiments for the use of the Chinese and 

 Malays, who consider it an exceedingly nutritive and stimulating (aphro- 

 disiacum) article. 



V) Tentacles ramose. 



Genera : Cladolabes BRANDT (tentacles 20), Colochirus TROSCH. 

 (Tentacles ten, two smaller). 



Psolus OKEN (in part). Feet equal, disposed on a ventral flat 

 disc, on the back none. Tentacles ramose. 



Psolus JAEG., BR. Body attenuated backwards, covered with 

 skin rugose or scaly. Three rows of feet in the ventral disc. 



Sp. Psolus phantapus, Holoth. phantapus L., Zool. dan. Tab. 112, FORB. Br. 

 Starf. p. 203, GUE'R. Iconogr. Zooph. PI. rv. fig. i ; in the North Sea. 



