394 FUNAFUTI ATOLL. 



ASPIDOSIPHON. STEENSTRUPII, Diesing. 



Aspidosiphon steenstrupii (Diesing), Selenka, Semper's Reisen. 

 Arch, der Philippinen iv., Die Sipunculiden, p. 116, pi. i., 

 figs. 12, 13; pi. xiii. figs. 190-192. 



A single specimen is here doubtfully referred to this species. 

 The body and proboscis are of a uniform pale brown colour, the 

 anterior and posterior shields are darker, the latter is granular 

 and radiately grooved, the former is slightly granular ; an encircling 

 series of about twenty small tubercles mark the line of union of 

 the proboscis with the body. 



The proboscis is clothed with a series of chitinous bodies of two 

 kinds, those on the anterior half consist of flat curved bidentate 

 hooks arranged in rings, each hook is about 0'05 mm. in height 

 and 0-04 in width at the base. On the posterior half the chitinous 

 bodies are scattered, they are elongate, three sided, slightly bent 

 but not hooked at the summits, they are O04 mm. in height and 

 0'025 in width at the base. Numerous papillate skin glands 

 occur between the rows of hooks, one to every four or five hooks. 



The retractor muscles are 15 mm. in length, they are attached 

 about 3 mm. from the posterior end of the body and are joined 

 together at about 4 mm. from their point of attachment. The 

 segmental organs are equal in length to the combined portion 

 of the retractors, and are free from the body-wall for three fourths 

 of their length. At the posterior third of the body there are 

 twenty-five longitudinal muscle bands. 



This form comes very near to A. speculator, Selenka, but the 

 retractors are united much nearer the posterior end of the body, 

 and the segmental organs are free for a greater distance than in 

 Selenka's species. 



CLOEOSIPHON ASPERGILLUM, Quatrefages. 



Cloeosiphon aspergillum (Quatrefages), Selenka, Semper's Reisen. 

 Arch, der Philippinen iv., Die Sipunculiden, p. 126, pi. ii. 

 figs. 23, 24; pi. xiv. figs. 214-216. 



A solitary example is somewhat doubtfully referred to this 

 species. The specimen is 6 cm. in length, the proboscis is 

 damaged and no hooks were available for examination. In other 

 respects it agrees fairly well with the published description. 



