148 N. Annandale : A Polyzoon from the Himalayas. [VOL. I, 1907. 



1887) is right, as I believe him to be, in regarding the forms consti- 

 tuting Hyalindla as synonyms of Plumatella punctata, Hancock, 

 Rousselet's proposal is open to very grave objections. One of the 

 most characteristic differences between Lophopus and Plumatella 

 is the comparatively large size of the statoblasts of the former. 

 This is well illustrated by the following table : — 



; Free Statobi,asts. 



I^ength. Breadth. 



1. Plumatella princeps, Krae-'j 



pelin = same author ' s Co-36 — 0-37 mm. 0-2 — 0*3 mm. 

 " emarginata, Reihe " . . J 



2. Plumatella polymorpha, Kiae-"^^ 



^^ pelin = same a u t h o r's ^0-214 — 0*53 ,, 9-2 — 0"4i3 



'' repens, Reihe " . , J 



3. Plumatella philippinensis, ) 



Kraepelin .. ;[o-4-o-47i „ o-2-o-4i3 



4. Plumatella javanica, Krae- > 



pelin .. _ ^ o" 347— 0-420 , , c 2— 0*260 



5. Plumatella punctata, Hancock 0*4 — 0*54 ,, 0*27 — o"4i 



6. Lophopus crystallinus (Pallas) i — 1*3 ,, o'6 — 0*7 



7. Lophopus ledenfeldi, Ridley. . 0*85 — ©'95 ,, 0*7 



8. Lophopus ledenfeldi var. indi- > ^ 



t^ t- > \ 0-9 — i-i ,, o'5 — o*6 



ca, var. nov. . . ^ ^ ?> ^ 



9. Lophopus carteri (Hyatt) . . (approx.) o'S ,,{approx.) 0-63 

 10. Lophopus jheringi, Meissner i ,, o'8 



For the figures as regards species i, 2, 3, 5 and 6 I am in- 

 debted to Kraepelin's Deutschen Siisswasser-Bryozoen, and as re- 

 gards 4 to the same author's account of a new species in Mitt. 

 Naturh. Museum Hamburg, xxiii, p. 146 ; the measurements of the 

 statoblast of the typical L. ledenfeldi are taken from Ridley's 

 original description, those of that of L. carteri deduced from 

 Carter's figure, and those of L. jheringi derived from Meissner's 

 description in the Sitzh. Nat. Freund. Berlin, 1892, p. 260. 

 P. punctata is not uncommon in Calcutta and its statoblasts here 

 are generally smaller than those from Europe, although their 

 form and proportions agree well with Kraepelin's figures. I have 

 been unable to detect in the ectocyst of this species any trace of 

 the cells characteristic of that of Lophopus. 



I take the opportunity to note a description of a new Asiatic 

 freshwater Polyzoon, viz., Pectinatella davenporti , Oka, described 

 from Japan in the Zoologische Anzeiger, vol. xxxi. No, 23, 

 May, 1907. It is noteworthy that in the genus Pectinatella one 

 species (P. magnifica, I^eidy, from America and Europe) has 

 hooked processes on the statoblast ; one (P. davenporti. Oka, from 

 Japan) has simple processes, while the third (P. gelatinosa, Oka, 

 also from Japan) lacks processes altogether. 



