NO. 3 DEICHMANN: HOLOTHURIOIDEA ; PART I, DENDROCHIROTA 91 



in length. In the type the gonads are large ; many tubes measure almost 

 2 cm. ; presumably it is a male, as no traces of eggs were seen. 



It is possible that an external layer of more delicate spicules normally 

 is present but has been destroyed. The spicules are slightly reminiscent 

 of those characteristic of Eupentacta pseudoquinquesemita Deichmann, 

 from the Alaskan waters, but they are smaller, and the tails on the cal- 

 careous ring are distinctly longer in the present species. 



The name anexigiia is given because it was at first glance assumed 

 that the present species was identical with Ludwig's Cucumaria exigua 

 from China and, supposedly, also Chile (see p. 81). The species from 

 Chile is now called C. chilensis, as indicated in Ludwig's figures; it was 

 actually rediscovered by the Allan Hancock Expedition (see p. 80). 

 Dissection revealed, however, that the calcareous ring was entirely dif- 

 ferent — with long tails — and the species must therefore be regarded as 

 new. 



Genus 4. APENTAMERA, new genus 



Diagnosis. — Small forms (few cm. long) with tube feet in 5 bands, 

 papilliform toward the ends where 5 valves are formed ; a few smaller 

 papilliform tube feet are scattered in the dorsal interambulacra, may be 

 lacking in small individuals. Tentacles 10, the 2 ventral smaller. Skin 

 rigid, packed with spicules. Calcareous ring with long posterior prolon- 

 gations; other internal features almost as in Pentamera. 



Spicules an external layer of flattened baskets almost rosettelike, 

 easily overlooked and may possibly be lost in older individuals, and an 

 inner layer of regular 4-holed knobbed buttons. Feet with end plate 

 smaller in the terminal appendages; walls packed with curved supporting 

 tables with 2 pillars and a few blunt teeth. Introvert with oblong tables 

 or plates with slightly knobbed edge. Tentacles packed with plates and 

 rods which gradually decrease in size in the branches; apparently no 

 rosettes. 



Type species. — Apentamera lepra, new species. 



Remarks. — The material of the type species was originally referred 

 to 2 genera related respectively to Pentamera and Pentacta, possibly with 

 affinities to some of the Thyone-\\\it forms. After all other species had 

 been classified, it became evident that these two "genera" represented 

 only one, which in spite of its affinities to the Thyone-\\\ic forms could 

 not be placed among these. 



