244 CEYLON PEARL OYSTER REPORT. 



taken to England, consisting mostly, but not entirely, of duplicates of some of the 

 species contained in the first set, was sent out to me by Professor Herdman. These 

 had also passed through the hands of Mr. Arnold T. Watson, who kindly forwarded 

 to me such notes and drawings as he had made, some of the latter being reproduced 

 on Plate VIII. A species of Polydora which attacks the pearl oyster was subsequently 

 forwarded by Mr. Horn ell. 



Some new facts of systematic importance relating to previously described species 

 are recoi'ded here. Among the species described as new are some of considerable 

 interest, e.g., Autolytus orientalis, Branchiomma quadrioculatum, Ceratonereis 

 falcaria, Grymcea cespitosa, Halosydna zeylanica, Leprea inversa, Paramarphysa 

 orientalis, Serpula watsoni, TJialenessa stylolepis. 



The occurrence of Onupliis conchylega and the recovery of Harmothoe dictyophora 

 are also noteworthy features of the collection. 



Family: AMPHINOMID^E. 



Chloeia flava (Pallas) Plate I., figs. 1 and 2. 



Chloeia ceylonica, Grube, 1874, "Ann. Ceylon," 'P. Zool. Soc,,' p. 326. 

 Chloeia flava (Sav.), Grube, 'Ann. Semp.,' 1878, p. 10. 



Four rather small specimens from Station LVL, Dutch Modragam Paar, 9 fathoms ; 

 average length about 28 millims., with 24 setigerous segments. Another smaller 

 specimen is also in the collection. 



Examples of dorsal and ventral bayonet setae, the former barbed, are shown in 

 Plate I., figs. 1 and 2. The branchife commence on the fourth segment ; mediad of 

 the violet tinted dorsal cirrus of the first four segments there is an accessory cirrus, 

 that on the fourth segment being very slender. The caruncle of this well-known 

 species is attached to the first two segments, and is produced backwards over the 

 next two ; it consists of an upper and lower series of lamellae, those of each series 

 united together in a zigzag manner by their lower ends ; those of the upper series are 

 further united together in couples along the crest of the caruncle. 



The Amphinomidfe are not, I believe, as a rule, rapacious Annelids, but swallow 

 sand and small stones, &c. Probably they are preyed upon by the Aphroditidoe, since 

 the small specimen (No. 64) was penetrated by some of the enormously long barbed 

 spines of Hermione. 



A small worm taken in 24 fathoms, at Station LXIIL, west of Periya Paar, seems 

 to be a form of the same species ; it is 9 millims. long, 20 segments. The tentaculum 

 impar is nearly as long as the caruncle, and, like the dorsal cirri and the stems of the 

 gills, deep purplish crimson in colour. No colour marks were observed along the 

 hack, and the crimson cirri stood out prominently from the midst of the very long and 

 delicate setae. Branchias commence as usual on the fourth segment ; accessory dorsal 

 cirrus observed on the first three segments only, as described by Grube ; the folds of 



