153 



P. longogranula differs in the shape of the miliary granules 

 distinctly from the three species described above. From kefersteinii, 

 which occurs in the same locality, it furthermore differs in the 

 shape of the calcareous ring, of the anchors and anchor-plates, 

 and probably also in the shape of the madreporic body. 



Polyplectana zamboangae n. sp. 



St. Crux Island, Zamboanga. 25.— 28.11.1914. Three fragments. 



The fragments at hand are on their dorsal side mud-grey and 

 ventrally pure white. The anterior end has 25 tentacles, which 

 are so contracted that neither the number of the digits nor the 

 presence of a web can be ascertained. The cartilaginous ring is 

 well developed and nearly encloses the calcareous ring, which is 

 quite like that of kefersteinii (Fig. 12. 3). There are many polian 

 vesicles and a single stone-canal. The madreporite is longer than 

 in kefersteinii. The intestine has a loop, but it is not so well 

 preserved that it is posible to state anything about the oesophagus 

 and the ventricle. The ciliated funnels are of the usual shape and 

 size and found on the mesenteries close to the body-wall. 



The anchors are in the anterior end of body ca. 250 fi in 

 length and 150 [i in width. In the posterior end of body they are 

 ca. 170 jn in length and 150 ^ in width. Those from the anterior 

 end of body are of very varying shape (Fig. 13. 2-4), some being 

 quite asymmetrical. This is not the case with those more posteriorly 

 (Fig. 13. 1). The anchor-plates measure in the anterior end of 

 body ca. 190 /n in length and 150 in width. The articular hole 

 and the bridge (Fig. 14. 4) is distinctly serrate. The plates from 

 the posterior end of the specimen (Fig. 14. 5) measure ca. 210 fi 

 in length by 160 // in width. Also here the bridges are serrate, 

 but the articular holes are usually smooth. The miliary granules 

 (Fig. 1 1 . 3-4) are very like the granules in longogranula, and also 

 here the posterior rods are the longest and have the characteristic 

 swollen middle. Besides the miliary granules there are oval plates 

 in the ambulacra. These (Fig. 11.8) measure ca. 30 fi in length. In 

 the oral disk and in the tentacles there are no calcareous deposits. 



P. zamboangae is in the shape of the calcareous ring very like 

 kefersteinii and in that of the miliary granules like longogranula, but 



